diff --git a/Java/commons-lang-MethodUtilsTest_711/Dockerfile b/Java/commons-lang-MethodUtilsTest_711/Dockerfile
new file mode 100644
index 000000000..7b7fbe349
--- /dev/null
+++ b/Java/commons-lang-MethodUtilsTest_711/Dockerfile
@@ -0,0 +1,18 @@
+FROM ghcr.io/kupl/starlab-benchmarks/java-base:commons-lang
+
+ENV TZ=Asia/Seoul
+
+COPY ./metadata.json .
+COPY ./npe.json .
+COPY ./buggy.java /tmp/buggy.java
+RUN export BUGGY_PATH=$(cat metadata.json | jq -r ".npe.filepath") \
+    && export BUGGY_LINE=$(cat metadata.json | jq -r ".npe.line") \
+    && export BUGGY_MTHD=$(cat metadata.json | jq -r ".npe.npe_method") \
+    && mv /tmp/buggy.java $BUGGY_PATH \
+    && echo "[{\"filepath\": \"$BUGGY_PATH\", \"line\": $BUGGY_LINE, \"method_name\": \"$BUGGY_MTHD\"}]" | jq . > traces.json
+
+RUN git init . && git add -A
+
+RUN $(cat metadata.json | jq -r ".buildCommand")
+
+RUN $(cat metadata.json | jq -r ".testCommand"); if [ $? -eq 0 ]; then exit 1; fi
diff --git a/Java/commons-lang-MethodUtilsTest_711/buggy.java b/Java/commons-lang-MethodUtilsTest_711/buggy.java
new file mode 100644
index 000000000..943c7a905
--- /dev/null
+++ b/Java/commons-lang-MethodUtilsTest_711/buggy.java
@@ -0,0 +1,788 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.lang3.reflect;
+
+import static org.hamcrest.Matchers.hasItemInArray;
+import static org.hamcrest.Matchers.hasItems;
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNotSame;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertSame;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.Type;
+import java.util.Arrays;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.commons.lang3.ArrayUtils;
+import org.apache.commons.lang3.ClassUtils;
+import org.apache.commons.lang3.ClassUtils.Interfaces;
+import org.apache.commons.lang3.math.NumberUtils;
+import org.apache.commons.lang3.mutable.Mutable;
+import org.apache.commons.lang3.mutable.MutableObject;
+import org.apache.commons.lang3.reflect.testbed.Annotated;
+import org.apache.commons.lang3.reflect.testbed.GenericConsumer;
+import org.apache.commons.lang3.reflect.testbed.GenericParent;
+import org.apache.commons.lang3.reflect.testbed.StringParameterizedChild;
+import org.apache.commons.lang3.tuple.ImmutablePair;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * Unit tests MethodUtils
+ */
+public class MethodUtilsTest {
+
+    private static interface PrivateInterface {}
+
+    static class TestBeanWithInterfaces implements PrivateInterface {
+        public String foo() {
+            return "foo()";
+        }
+    }
+
+    public static class TestBean {
+
+        public static String bar() {
+            return "bar()";
+        }
+
+        public static String bar(final int i) {
+            return "bar(int)";
+        }
+
+        public static String bar(final Integer i) {
+            return "bar(Integer)";
+        }
+
+        public static String bar(final double d) {
+            return "bar(double)";
+        }
+
+        public static String bar(final String s) {
+            return "bar(String)";
+        }
+
+        public static String bar(final Object o) {
+            return "bar(Object)";
+        }
+
+        public static String bar(final String... s) {
+            return "bar(String...)";
+        }
+
+        public static String bar(final Integer i, final String... s) {
+            return "bar(int, String...)";
+        }
+
+        public static void oneParameterStatic(final String s) {
+            // empty
+        }
+        
+        @SuppressWarnings("unused")
+        private void privateStuff() {
+        }
+
+        @SuppressWarnings("unused")
+        private String privateStringStuff() {
+        	return "privateStringStuff()";
+        }
+        
+        @SuppressWarnings("unused")
+        private String privateStringStuff(final int i) {
+        	return "privateStringStuff(int)";
+        }
+        
+        @SuppressWarnings("unused")
+        private String privateStringStuff(final Integer i) {
+        	return "privateStringStuff(Integer)";
+        }
+        
+        @SuppressWarnings("unused")
+        private String privateStringStuff(final double d) {
+        	return "privateStringStuff(double)";
+        }
+        
+        @SuppressWarnings("unused")
+        private String privateStringStuff(final String s) {
+        	return "privateStringStuff(String)";
+        }
+        
+        @SuppressWarnings("unused")
+        private String privateStringStuff(final Object s) {
+        	return "privateStringStuff(Object)";
+        }
+
+
+        public String foo() {
+            return "foo()";
+        }
+
+        public String foo(final int i) {
+            return "foo(int)";
+        }
+
+        public String foo(final Integer i) {
+            return "foo(Integer)";
+        }
+
+        public String foo(final double d) {
+            return "foo(double)";
+        }
+
+        public String foo(final String s) {
+            return "foo(String)";
+        }
+
+        public String foo(final Object o) {
+            return "foo(Object)";
+        }
+
+        public String foo(final String... s) {
+            return "foo(String...)";
+        }
+
+        public String foo(final Integer i, final String... s) {
+            return "foo(int, String...)";
+        }
+
+        public void oneParameter(final String s) {
+            // empty
+        }
+
+        public String foo(final Object... s) {
+            return "foo(Object...)";
+        }
+
+        public int[] unboxing(int... values) {
+            return values;
+        }
+
+        // This method is overloaded for the wrapper class for every primitive type, plus the common supertypes
+        // Number and Object. This is an acid test since it easily leads to ambiguous methods.
+        public static String varOverload(Byte... args) { return "Byte..."; }
+        public static String varOverload(Character... args) { return "Character..."; }
+        public static String varOverload(Short... args) { return "Short..."; }
+        public static String varOverload(Boolean... args) { return "Boolean..."; }
+        public static String varOverload(Float... args) { return "Float..."; }
+        public static String varOverload(Double... args) { return "Double..."; }
+        public static String varOverload(Integer... args) { return "Integer..."; }
+        public static String varOverload(Long... args) { return "Long..."; }
+        public static String varOverload(Number... args) { return "Number..."; }
+        public static String varOverload(Object... args) { return "Object..."; }
+        public static String varOverload(String... args) { return "String..."; }
+
+        // This method is overloaded for the wrapper class for every numeric primitive type, plus the common
+        // supertype Number
+        public static String numOverload(Byte... args) { return "Byte..."; }
+        public static String numOverload(Short... args) { return "Short..."; }
+        public static String numOverload(Float... args) { return "Float..."; }
+        public static String numOverload(Double... args) { return "Double..."; }
+        public static String numOverload(Integer... args) { return "Integer..."; }
+        public static String numOverload(Long... args) { return "Long..."; }
+        public static String numOverload(Number... args) { return "Number..."; }
+
+        // These varOverloadEcho and varOverloadEchoStatic methods are designed to verify that
+        // not only is the correct overloaded variant invoked, but that the varags arguments
+        // are also delivered correctly to the method.
+        public ImmutablePair<String, Object[]> varOverloadEcho(String... args) {
+          return new ImmutablePair<String, Object[]>("String...", args);
+        }
+        public ImmutablePair<String, Object[]> varOverloadEcho(Number... args) {
+          return new ImmutablePair<String, Object[]>("Number...", args);
+        }
+
+        public static ImmutablePair<String, Object[]> varOverloadEchoStatic(String... args) {
+          return new ImmutablePair<String, Object[]>("String...", args);
+        }
+        public static ImmutablePair<String, Object[]> varOverloadEchoStatic(Number... args) {
+          return new ImmutablePair<String, Object[]>("Number...", args);
+        }
+
+        static void verify(ImmutablePair<String, Object[]> a, ImmutablePair<String, Object[]> b) {
+          assertEquals(a.getLeft(), b.getLeft());
+          assertArrayEquals(a.getRight(), b.getRight());
+        }
+
+        static void verify(ImmutablePair<String, Object[]> a, Object _b) {
+          @SuppressWarnings("unchecked")
+          final ImmutablePair<String, Object[]> b = (ImmutablePair<String, Object[]>) _b;
+          verify(a, b);
+        }
+
+    }
+
+    private static class TestMutable implements Mutable<Object> {
+        @Override
+        public Object getValue() {
+            return null;
+        }
+
+        @Override
+        public void setValue(final Object value) {
+        }
+    }
+
+    private TestBean testBean;
+    private final Map<Class<?>, Class<?>[]> classCache = new HashMap<Class<?>, Class<?>[]>();
+
+    @Before
+    public void setUp() throws Exception {
+        testBean = new TestBean();
+        classCache.clear();
+    }
+
+    @Test
+    public void testConstructor() throws Exception {
+        assertNotNull(MethodUtils.class.newInstance());
+    }
+
+    @Test
+    public void verifyJavaVarargsOverloadingResolution() throws Exception {
+        // This code is not a test of MethodUtils.
+        // Rather it makes explicit the behavior of the Java specification for
+        // various cases of overload resolution.
+        assertEquals("Byte...", TestBean.varOverload((byte) 1, (byte) 2));
+        assertEquals("Short...", TestBean.varOverload((short) 1, (short) 2));
+        assertEquals("Integer...", TestBean.varOverload(1, 2));
+        assertEquals("Long...", TestBean.varOverload(1L, 2L));
+        assertEquals("Float...", TestBean.varOverload(1f, 2f));
+        assertEquals("Double...", TestBean.varOverload(1d, 2d));
+        assertEquals("Character...", TestBean.varOverload('a', 'b'));
+        assertEquals("String...", TestBean.varOverload("a", "b"));
+        assertEquals("Boolean...", TestBean.varOverload(true, false));
+
+        assertEquals("Object...", TestBean.varOverload(1, "s"));
+        assertEquals("Object...", TestBean.varOverload(1, true));
+        assertEquals("Object...", TestBean.varOverload(1.1, true));
+        assertEquals("Object...", TestBean.varOverload('c', true));
+        assertEquals("Number...", TestBean.varOverload(1, 1.1));
+        assertEquals("Number...", TestBean.varOverload(1, 1L));
+        assertEquals("Number...", TestBean.varOverload(1d, 1f));
+        assertEquals("Number...", TestBean.varOverload((short) 1, (byte) 1));
+        assertEquals("Object...", TestBean.varOverload(1, 'c'));
+        assertEquals("Object...", TestBean.varOverload('c', "s"));
+    }
+
+    @Test
+    public void testInvokeJavaVarargsOverloadingResolution() throws Exception {
+        assertEquals("Byte...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", (byte) 1, (byte) 2));
+        assertEquals("Short...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", (short) 1, (short) 2));
+        assertEquals("Integer...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", 1, 2));
+        assertEquals("Long...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", 1L, 2L));
+        assertEquals("Float...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", 1f, 2f));
+        assertEquals("Double...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", 1d, 2d));
+        assertEquals("Character...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", 'a', 'b'));
+        assertEquals("String...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", "a", "b"));
+        assertEquals("Boolean...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", true, false));
+
+        assertEquals("Object...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", 1, "s"));
+        assertEquals("Object...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", 1, true));
+        assertEquals("Object...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", 1.1, true));
+        assertEquals("Object...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", 'c', true));
+        assertEquals("Number...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", 1, 1.1));
+        assertEquals("Number...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", 1, 1L));
+        assertEquals("Number...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", 1d, 1f));
+        assertEquals("Number...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", (short) 1, (byte) 1));
+        assertEquals("Object...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", 1, 'c'));
+        assertEquals("Object...", MethodUtils.invokeStaticMethod(TestBean.class,
+                "varOverload", 'c', "s"));
+
+        assertEquals("Object...", MethodUtils.invokeStaticMethod(TestBean.class, "varOverload",
+                (Object[]) ArrayUtils.EMPTY_CLASS_ARRAY));
+        assertEquals("Number...", MethodUtils.invokeStaticMethod(TestBean.class, "numOverload",
+                (Object[]) ArrayUtils.EMPTY_CLASS_ARRAY));
+    }
+
+    @Test
+    public void testInvokeMethod() throws Exception {
+        assertEquals("foo()", MethodUtils.invokeMethod(testBean, "foo",
+                (Object[]) ArrayUtils.EMPTY_CLASS_ARRAY));
+        assertEquals("foo()", MethodUtils.invokeMethod(testBean, "foo"));
+        assertEquals("foo()", MethodUtils.invokeMethod(testBean, "foo",
+                (Object[]) null));
+        assertEquals("foo()", MethodUtils.invokeMethod(testBean, "foo",
+                (Object[]) null, (Class<?>[]) null));
+        assertEquals("foo(String)", MethodUtils.invokeMethod(testBean, "foo",
+                ""));
+        assertEquals("foo(Object)", MethodUtils.invokeMethod(testBean, "foo",
+                new Object()));
+        assertEquals("foo(Object)", MethodUtils.invokeMethod(testBean, "foo",
+                Boolean.TRUE));
+        assertEquals("foo(Integer)", MethodUtils.invokeMethod(testBean, "foo",
+                NumberUtils.INTEGER_ONE));
+        assertEquals("foo(int)", MethodUtils.invokeMethod(testBean, "foo",
+                NumberUtils.BYTE_ONE));
+        assertEquals("foo(double)", MethodUtils.invokeMethod(testBean, "foo",
+                NumberUtils.LONG_ONE));
+        assertEquals("foo(double)", MethodUtils.invokeMethod(testBean, "foo",
+                NumberUtils.DOUBLE_ONE));
+        assertEquals("foo(String...)", MethodUtils.invokeMethod(testBean, "foo",
+                "a", "b", "c"));
+        assertEquals("foo(String...)", MethodUtils.invokeMethod(testBean, "foo",
+                "a", "b", "c"));
+        assertEquals("foo(int, String...)", MethodUtils.invokeMethod(testBean, "foo",
+                5, "a", "b", "c"));
+
+        TestBean.verify(new ImmutablePair<String, Object[]>("String...", new String[]{"x", "y"}),
+                        MethodUtils.invokeMethod(testBean, "varOverloadEcho", "x", "y"));
+        TestBean.verify(new ImmutablePair<String, Object[]>("Number...", new Number[]{17, 23, 42}),
+                        MethodUtils.invokeMethod(testBean, "varOverloadEcho", 17, 23, 42));
+        TestBean.verify(new ImmutablePair<String, Object[]>("String...", new String[]{"x", "y"}),
+                        MethodUtils.invokeMethod(testBean, "varOverloadEcho", "x", "y"));
+        TestBean.verify(new ImmutablePair<String, Object[]>("Number...", new Number[]{17, 23, 42}),
+                        MethodUtils.invokeMethod(testBean, "varOverloadEcho", 17, 23, 42));
+    }
+
+    @Test
+    public void testInvokeExactMethod() throws Exception {
+        assertEquals("foo()", MethodUtils.invokeExactMethod(testBean, "foo",
+                (Object[]) ArrayUtils.EMPTY_CLASS_ARRAY));
+        assertEquals("foo()", MethodUtils.invokeExactMethod(testBean, "foo"));
+        assertEquals("foo()", MethodUtils.invokeExactMethod(testBean, "foo",
+                (Object[]) null));
+        assertEquals("foo()", MethodUtils.invokeExactMethod(testBean, "foo",
+                (Object[]) null, (Class<?>[]) null));
+        assertEquals("foo(String)", MethodUtils.invokeExactMethod(testBean,
+                "foo", ""));
+        assertEquals("foo(Object)", MethodUtils.invokeExactMethod(testBean,
+                "foo", new Object()));
+        assertEquals("foo(Integer)", MethodUtils.invokeExactMethod(testBean,
+                "foo", NumberUtils.INTEGER_ONE));
+        assertEquals("foo(double)", MethodUtils.invokeExactMethod(testBean,
+                "foo", new Object[] { NumberUtils.DOUBLE_ONE },
+                new Class[] { Double.TYPE }));
+
+        try {
+            MethodUtils
+                    .invokeExactMethod(testBean, "foo", NumberUtils.BYTE_ONE);
+            fail("should throw NoSuchMethodException");
+        } catch (final NoSuchMethodException e) {
+        }
+        try {
+            MethodUtils
+                    .invokeExactMethod(testBean, "foo", NumberUtils.LONG_ONE);
+            fail("should throw NoSuchMethodException");
+        } catch (final NoSuchMethodException e) {
+        }
+        try {
+            MethodUtils.invokeExactMethod(testBean, "foo", Boolean.TRUE);
+            fail("should throw NoSuchMethodException");
+        } catch (final NoSuchMethodException e) {
+        }
+    }
+
+    @Test
+    public void testInvokeStaticMethod() throws Exception {
+        assertEquals("bar()", MethodUtils.invokeStaticMethod(TestBean.class,
+                "bar", (Object[]) ArrayUtils.EMPTY_CLASS_ARRAY));
+        assertEquals("bar()", MethodUtils.invokeStaticMethod(TestBean.class,
+                "bar", (Object[]) null));
+        assertEquals("bar()", MethodUtils.invokeStaticMethod(TestBean.class,
+                "bar", (Object[]) null, (Class<?>[]) null));
+        assertEquals("bar(String)", MethodUtils.invokeStaticMethod(
+                TestBean.class, "bar", ""));
+        assertEquals("bar(Object)", MethodUtils.invokeStaticMethod(
+                TestBean.class, "bar", new Object()));
+        assertEquals("bar(Object)", MethodUtils.invokeStaticMethod(
+                TestBean.class, "bar", Boolean.TRUE));
+        assertEquals("bar(Integer)", MethodUtils.invokeStaticMethod(
+                TestBean.class, "bar", NumberUtils.INTEGER_ONE));
+        assertEquals("bar(int)", MethodUtils.invokeStaticMethod(TestBean.class,
+                "bar", NumberUtils.BYTE_ONE));
+        assertEquals("bar(double)", MethodUtils.invokeStaticMethod(
+                TestBean.class, "bar", NumberUtils.LONG_ONE));
+        assertEquals("bar(double)", MethodUtils.invokeStaticMethod(
+                TestBean.class, "bar", NumberUtils.DOUBLE_ONE));
+        assertEquals("bar(String...)", MethodUtils.invokeStaticMethod(
+                TestBean.class, "bar", "a", "b"));
+        assertEquals("bar(int, String...)", MethodUtils.invokeStaticMethod(
+                TestBean.class, "bar", NumberUtils.INTEGER_ONE, "a", "b"));
+
+        TestBean.verify(new ImmutablePair<String, Object[]>("String...", new String[]{"x", "y"}),
+                        MethodUtils.invokeStaticMethod(TestBean.class, "varOverloadEchoStatic", "x", "y"));
+        TestBean.verify(new ImmutablePair<String, Object[]>("Number...", new Number[]{17, 23, 42}),
+                        MethodUtils.invokeStaticMethod(TestBean.class, "varOverloadEchoStatic", 17, 23, 42));
+        TestBean.verify(new ImmutablePair<String, Object[]>("String...", new String[]{"x", "y"}),
+                        MethodUtils.invokeStaticMethod(TestBean.class, "varOverloadEchoStatic", "x", "y"));
+        TestBean.verify(new ImmutablePair<String, Object[]>("Number...", new Number[]{17, 23, 42}),
+                        MethodUtils.invokeStaticMethod(TestBean.class, "varOverloadEchoStatic", 17, 23, 42));
+
+        try {
+            MethodUtils.invokeStaticMethod(TestBean.class, "does_not_exist");
+            fail("should throw NoSuchMethodException");
+        } catch (final NoSuchMethodException e) {
+        }
+    }
+
+    @Test
+    public void testInvokeExactStaticMethod() throws Exception {
+        assertEquals("bar()", MethodUtils.invokeExactStaticMethod(TestBean.class,
+                "bar", (Object[]) ArrayUtils.EMPTY_CLASS_ARRAY));
+        assertEquals("bar()", MethodUtils.invokeExactStaticMethod(TestBean.class,
+                "bar", (Object[]) null));
+        assertEquals("bar()", MethodUtils.invokeExactStaticMethod(TestBean.class,
+                "bar", (Object[]) null, (Class<?>[]) null));
+        assertEquals("bar(String)", MethodUtils.invokeExactStaticMethod(
+                TestBean.class, "bar", ""));
+        assertEquals("bar(Object)", MethodUtils.invokeExactStaticMethod(
+                TestBean.class, "bar", new Object()));
+        assertEquals("bar(Integer)", MethodUtils.invokeExactStaticMethod(
+                TestBean.class, "bar", NumberUtils.INTEGER_ONE));
+        assertEquals("bar(double)", MethodUtils.invokeExactStaticMethod(
+                TestBean.class, "bar", new Object[] { NumberUtils.DOUBLE_ONE },
+                new Class[] { Double.TYPE }));
+
+        try {
+            MethodUtils.invokeExactStaticMethod(TestBean.class, "bar",
+                    NumberUtils.BYTE_ONE);
+            fail("should throw NoSuchMethodException");
+        } catch (final NoSuchMethodException e) {
+        }
+        try {
+            MethodUtils.invokeExactStaticMethod(TestBean.class, "bar",
+                    NumberUtils.LONG_ONE);
+            fail("should throw NoSuchMethodException");
+        } catch (final NoSuchMethodException e) {
+        }
+        try {
+            MethodUtils.invokeExactStaticMethod(TestBean.class, "bar",
+                    Boolean.TRUE);
+            fail("should throw NoSuchMethodException");
+        } catch (final NoSuchMethodException e) {
+        }
+    }
+
+    @Test
+    public void testGetAccessibleInterfaceMethod() throws Exception {
+        final Class<?>[][] p = { ArrayUtils.EMPTY_CLASS_ARRAY, null };
+        for (final Class<?>[] element : p) {
+            final Method method = TestMutable.class.getMethod("getValue", element);
+            final Method accessibleMethod = MethodUtils.getAccessibleMethod(method);
+            assertNotSame(accessibleMethod, method);
+            assertSame(Mutable.class, accessibleMethod.getDeclaringClass());
+        }
+    }
+
+    @Test
+    public void testGetAccessibleMethodPrivateInterface() throws Exception {
+        final Method expected = TestBeanWithInterfaces.class.getMethod("foo");
+        assertNotNull(expected);
+        final Method actual = MethodUtils.getAccessibleMethod(TestBeanWithInterfaces.class, "foo");
+        assertNull(actual);
+    }
+
+    @Test
+    public void testGetAccessibleInterfaceMethodFromDescription()
+            throws Exception {
+        final Class<?>[][] p = { ArrayUtils.EMPTY_CLASS_ARRAY, null };
+        for (final Class<?>[] element : p) {
+            final Method accessibleMethod = MethodUtils.getAccessibleMethod(
+                    TestMutable.class, "getValue", element);
+            assertSame(Mutable.class, accessibleMethod.getDeclaringClass());
+        }
+    }
+
+    @Test
+    public void testGetAccessiblePublicMethod() throws Exception {
+        assertSame(MutableObject.class, MethodUtils.getAccessibleMethod(
+                MutableObject.class.getMethod("getValue",
+                        ArrayUtils.EMPTY_CLASS_ARRAY)).getDeclaringClass());
+    }
+
+    @Test
+    public void testGetAccessiblePublicMethodFromDescription() throws Exception {
+        assertSame(MutableObject.class, MethodUtils.getAccessibleMethod(
+                MutableObject.class, "getValue", ArrayUtils.EMPTY_CLASS_ARRAY)
+                .getDeclaringClass());
+    }
+
+    @Test
+   public void testGetAccessibleMethodInaccessible() throws Exception {
+        final Method expected = TestBean.class.getDeclaredMethod("privateStuff");
+        final Method actual = MethodUtils.getAccessibleMethod(expected);
+        assertNull(actual);
+    }
+
+    @Test
+   public void testGetMatchingAccessibleMethod() throws Exception {
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                ArrayUtils.EMPTY_CLASS_ARRAY, ArrayUtils.EMPTY_CLASS_ARRAY);
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                null, ArrayUtils.EMPTY_CLASS_ARRAY);
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(String.class), singletonArray(String.class));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Object.class), singletonArray(Object.class));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Boolean.class), singletonArray(Object.class));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Byte.class), singletonArray(Integer.TYPE));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Byte.TYPE), singletonArray(Integer.TYPE));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Short.class), singletonArray(Integer.TYPE));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Short.TYPE), singletonArray(Integer.TYPE));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Character.class), singletonArray(Integer.TYPE));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Character.TYPE), singletonArray(Integer.TYPE));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Integer.class), singletonArray(Integer.class));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Integer.TYPE), singletonArray(Integer.TYPE));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Long.class), singletonArray(Double.TYPE));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Long.TYPE), singletonArray(Double.TYPE));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Float.class), singletonArray(Double.TYPE));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Float.TYPE), singletonArray(Double.TYPE));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Double.class), singletonArray(Double.TYPE));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Double.TYPE), singletonArray(Double.TYPE));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                singletonArray(Double.TYPE), singletonArray(Double.TYPE));
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                new Class[] {String.class, String.class}, new Class[] {String[].class});
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "foo",
+                new Class[] {Integer.TYPE, String.class, String.class}, new Class[] {Integer.class, String[].class});
+        expectMatchingAccessibleMethodParameterTypes(InheritanceBean.class, "testOne",
+                singletonArray(ParentObject.class), singletonArray(ParentObject.class));
+        expectMatchingAccessibleMethodParameterTypes(InheritanceBean.class, "testOne",
+                singletonArray(ChildObject.class), singletonArray(ParentObject.class));
+        expectMatchingAccessibleMethodParameterTypes(InheritanceBean.class, "testTwo",
+                singletonArray(ParentObject.class), singletonArray(GrandParentObject.class));
+        expectMatchingAccessibleMethodParameterTypes(InheritanceBean.class, "testTwo",
+                singletonArray(ChildObject.class), singletonArray(ChildInterface.class));
+    }
+
+    @Test
+    public void testNullArgument() {
+        expectMatchingAccessibleMethodParameterTypes(TestBean.class, "oneParameter",
+                singletonArray(null), singletonArray(String.class));
+    }
+
+    @Test
+    public void testGetOverrideHierarchyIncludingInterfaces() {
+        final Method method = MethodUtils.getAccessibleMethod(StringParameterizedChild.class, "consume", String.class);
+        final Iterator<MethodDescriptor> expected =
+            Arrays.asList(new MethodDescriptor(StringParameterizedChild.class, "consume", String.class),
+                new MethodDescriptor(GenericParent.class, "consume", GenericParent.class.getTypeParameters()[0]),
+                new MethodDescriptor(GenericConsumer.class, "consume", GenericConsumer.class.getTypeParameters()[0]))
+                .iterator();
+        for (final Method m : MethodUtils.getOverrideHierarchy(method, Interfaces.INCLUDE)) {
+            assertTrue(expected.hasNext());
+            final MethodDescriptor md = expected.next();
+            assertEquals(md.declaringClass, m.getDeclaringClass());
+            assertEquals(md.name, m.getName());
+            assertEquals(md.parameterTypes.length, m.getParameterTypes().length);
+            for (int i = 0; i < md.parameterTypes.length; i++) {
+                assertTrue(TypeUtils.equals(md.parameterTypes[i], m.getGenericParameterTypes()[i]));
+            }
+        }
+        assertFalse(expected.hasNext());
+    }
+
+    @Test
+    public void testGetOverrideHierarchyExcludingInterfaces() {
+        final Method method = MethodUtils.getAccessibleMethod(StringParameterizedChild.class, "consume", String.class);
+        final Iterator<MethodDescriptor> expected =
+            Arrays.asList(new MethodDescriptor(StringParameterizedChild.class, "consume", String.class),
+                new MethodDescriptor(GenericParent.class, "consume", GenericParent.class.getTypeParameters()[0]))
+                .iterator();
+        for (final Method m : MethodUtils.getOverrideHierarchy(method, Interfaces.EXCLUDE)) {
+            assertTrue(expected.hasNext());
+            final MethodDescriptor md = expected.next();
+            assertEquals(md.declaringClass, m.getDeclaringClass());
+            assertEquals(md.name, m.getName());
+            assertEquals(md.parameterTypes.length, m.getParameterTypes().length);
+            for (int i = 0; i < md.parameterTypes.length; i++) {
+                assertTrue(TypeUtils.equals(md.parameterTypes[i], m.getGenericParameterTypes()[i]));
+            }
+        }
+        assertFalse(expected.hasNext());
+    }
+
+    @Test
+    @Annotated
+    public void testGetMethodsWithAnnotation() throws NoSuchMethodException {
+        assertArrayEquals(new Method[0], MethodUtils.getMethodsWithAnnotation(Object.class, Annotated.class));
+
+        Method[] methodsWithAnnotation = MethodUtils.getMethodsWithAnnotation(MethodUtilsTest.class, Annotated.class);
+        assertEquals(2, methodsWithAnnotation.length);
+        assertThat(methodsWithAnnotation, hasItemInArray(MethodUtilsTest.class.getMethod("testGetMethodsWithAnnotation")));
+        assertThat(methodsWithAnnotation, hasItemInArray(MethodUtilsTest.class.getMethod("testGetMethodsListWithAnnotation")));
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testGetMethodsWithAnnotationIllegalArgumentException1() {
+        MethodUtils.getMethodsWithAnnotation(FieldUtilsTest.class, null);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testGetMethodsWithAnnotationIllegalArgumentException2() {
+        MethodUtils.getMethodsWithAnnotation(null, Annotated.class);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testGetMethodsWithAnnotationIllegalArgumentException3() {
+        MethodUtils.getMethodsWithAnnotation(null, null);
+    }
+
+    @Test
+    @Annotated
+    public void testGetMethodsListWithAnnotation() throws NoSuchMethodException {
+        assertEquals(0, MethodUtils.getMethodsListWithAnnotation(Object.class, Annotated.class).size());
+
+        final List<Method> methodWithAnnotation = MethodUtils.getMethodsListWithAnnotation(MethodUtilsTest.class, Annotated.class);
+        assertEquals(2, methodWithAnnotation.size());
+        assertThat(methodWithAnnotation, hasItems(
+                MethodUtilsTest.class.getMethod("testGetMethodsWithAnnotation"),
+                MethodUtilsTest.class.getMethod("testGetMethodsListWithAnnotation")
+        ));
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testGetMethodsListWithAnnotationIllegalArgumentException1() {
+        MethodUtils.getMethodsListWithAnnotation(FieldUtilsTest.class, null);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testGetMethodsListWithAnnotationIllegalArgumentException2() {
+        MethodUtils.getMethodsListWithAnnotation(null, Annotated.class);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void testGetMethodsListWithAnnotationIllegalArgumentException3() {
+        MethodUtils.getMethodsListWithAnnotation(null, null);
+    }
+
+private void expectMatchingAccessibleMethodParameterTypes(final java.lang.Class<?> cls, final java.lang.String methodName, final java.lang.Class<?>[] requestTypes, final java.lang.Class<?>[] actualTypes) {
+    final java.lang.reflect.Method m = org.apache.commons.lang3.reflect.MethodUtils.getMatchingAccessibleMethod(cls, methodName, /* NPEX_NULL_EXP */
+    requestTypes);
+    Assert.assertNotNull(((("could not find any matches for " + methodName) + " (") + toString(requestTypes)) + ")", m);
+    Assert.assertTrue((toString(m.getParameterTypes()) + " not equals ") + toString(actualTypes), java.util.Arrays.equals(actualTypes, m.getParameterTypes()));
+}
+
+    private String toString(final Class<?>[] c) {
+        return Arrays.asList(c).toString();
+    }
+
+    private Class<?>[] singletonArray(final Class<?> c) {
+        Class<?>[] result = classCache.get(c);
+        if (result == null) {
+            result = new Class[] { c };
+            classCache.put(c, result);
+        }
+        return result;
+    }
+
+    public static class InheritanceBean {
+        public void testOne(final Object obj) {}
+        public void testOne(final GrandParentObject obj) {}
+        public void testOne(final ParentObject obj) {}
+        public void testTwo(final Object obj) {}
+        public void testTwo(final GrandParentObject obj) {}
+        public void testTwo(final ChildInterface obj) {}
+    }
+
+    interface ChildInterface {}
+    public static class GrandParentObject {}
+    public static class ParentObject extends GrandParentObject {}
+    public static class ChildObject extends ParentObject implements ChildInterface {}
+
+    private static class MethodDescriptor {
+        final Class<?> declaringClass;
+        final String name;
+        final Type[] parameterTypes;
+
+        MethodDescriptor(final Class<?> declaringClass, final String name, final Type... parameterTypes) {
+            this.declaringClass = declaringClass;
+            this.name = name;
+            this.parameterTypes = parameterTypes;
+        }
+    }
+
+    @Test
+    public void testVarArgsUnboxing() throws Exception {
+        TestBean testBean = new TestBean();
+        int[] actual = (int[])MethodUtils.invokeMethod(testBean, "unboxing", Integer.valueOf(1), Integer.valueOf(2));
+        Assert.assertArrayEquals(new int[]{1, 2}, actual);
+    }
+    
+    @Test
+    public void testInvokeMethodForceAccessNoArgs() throws Exception {
+        Method privateStringStuffMethod = MethodUtils.getMatchingMethod(TestBean.class, "privateStringStuff");
+        Assert.assertFalse(privateStringStuffMethod.isAccessible());
+        Assert.assertEquals("privateStringStuff()", MethodUtils.invokeMethod(testBean, true, "privateStringStuff"));
+        Assert.assertFalse(privateStringStuffMethod.isAccessible());
+    }
+    
+    @Test
+    public void testInvokeMethodForceAccessWithArgs() throws Exception {
+        Assert.assertEquals("privateStringStuff(Integer)", MethodUtils.invokeMethod(testBean, true, "privateStringStuff", 5));
+        Assert.assertEquals("privateStringStuff(double)", MethodUtils.invokeMethod(testBean, true, "privateStringStuff", 5.0d));
+        Assert.assertEquals("privateStringStuff(String)", MethodUtils.invokeMethod(testBean, true, "privateStringStuff", "Hi There"));
+        Assert.assertEquals("privateStringStuff(Object)", MethodUtils.invokeMethod(testBean, true, "privateStringStuff", new Date()));
+    }
+    
+    @Test
+    public void testDistance() throws Exception {
+        Method distanceMethod = MethodUtils.getMatchingMethod(MethodUtils.class, "distance", Class[].class, Class[].class);
+        distanceMethod.setAccessible(true);
+        
+        Assert.assertEquals(-1, distanceMethod.invoke(null, new Class[]{String.class}, new Class[]{Date.class}));
+        Assert.assertEquals(0, distanceMethod.invoke(null, new Class[]{Date.class}, new Class[]{Date.class}));
+        Assert.assertEquals(1, distanceMethod.invoke(null, new Class[]{Integer.class}, new Class[]{ClassUtils.wrapperToPrimitive(Integer.class)}));
+        Assert.assertEquals(2, distanceMethod.invoke(null, new Class[]{Integer.class}, new Class[]{Object.class}));
+        
+        distanceMethod.setAccessible(false);
+    }
+}
diff --git a/Java/commons-lang-MethodUtilsTest_711/metadata.json b/Java/commons-lang-MethodUtilsTest_711/metadata.json
new file mode 100644
index 000000000..3be27ee5b
--- /dev/null
+++ b/Java/commons-lang-MethodUtilsTest_711/metadata.json
@@ -0,0 +1,21 @@
+{
+  "language": "java",
+  "id": "commons-lang-MethodUtilsTest_711",
+  "buggyPath": ".",
+  "referencePath": null,
+  "buildCommand": "mvn package -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100 -DskipTests=true -DskipITs=true -Dtest=None -DfailIfNoTests=false",
+  "testCommand": "mvn clean test -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100",
+  "categories": [
+    "safety",
+    "npe"
+  ],
+  "npe": {
+    "filepath": "src/test/java/org/apache/commons/lang3/reflect/MethodUtilsTest.java",
+    "line": 709,
+    "npe_method": "expectMatchingAccessibleMethodParameterTypes",
+    "deref_field": "requestTypes",
+    "npe_class": "MethodUtilsTest",
+    "repo": "commons-lang",
+    "bug_id": "MethodUtilsTest_711"
+  }
+}
diff --git a/Java/commons-lang-MethodUtilsTest_711/npe.json b/Java/commons-lang-MethodUtilsTest_711/npe.json
new file mode 100644
index 000000000..09c31736a
--- /dev/null
+++ b/Java/commons-lang-MethodUtilsTest_711/npe.json
@@ -0,0 +1,7 @@
+{
+    "filepath": "src/test/java/org/apache/commons/lang3/reflect/MethodUtilsTest.java",
+    "line": 709,
+    "npe_method": "expectMatchingAccessibleMethodParameterTypes",
+    "deref_field": "requestTypes",
+    "npe_class": "MethodUtilsTest"
+}
\ No newline at end of file
diff --git a/Java/commons-lang-MethodUtils_229/Dockerfile b/Java/commons-lang-MethodUtils_229/Dockerfile
new file mode 100644
index 000000000..7b7fbe349
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_229/Dockerfile
@@ -0,0 +1,18 @@
+FROM ghcr.io/kupl/starlab-benchmarks/java-base:commons-lang
+
+ENV TZ=Asia/Seoul
+
+COPY ./metadata.json .
+COPY ./npe.json .
+COPY ./buggy.java /tmp/buggy.java
+RUN export BUGGY_PATH=$(cat metadata.json | jq -r ".npe.filepath") \
+    && export BUGGY_LINE=$(cat metadata.json | jq -r ".npe.line") \
+    && export BUGGY_MTHD=$(cat metadata.json | jq -r ".npe.npe_method") \
+    && mv /tmp/buggy.java $BUGGY_PATH \
+    && echo "[{\"filepath\": \"$BUGGY_PATH\", \"line\": $BUGGY_LINE, \"method_name\": \"$BUGGY_MTHD\"}]" | jq . > traces.json
+
+RUN git init . && git add -A
+
+RUN $(cat metadata.json | jq -r ".buildCommand")
+
+RUN $(cat metadata.json | jq -r ".testCommand"); if [ $? -eq 0 ]; then exit 1; fi
diff --git a/Java/commons-lang-MethodUtils_229/buggy.java b/Java/commons-lang-MethodUtils_229/buggy.java
new file mode 100644
index 000000000..5ed5c3fdb
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_229/buggy.java
@@ -0,0 +1,885 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.lang3.reflect;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Array;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.lang.reflect.Type;
+import java.lang.reflect.TypeVariable;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.commons.lang3.ArrayUtils;
+import org.apache.commons.lang3.ClassUtils;
+import org.apache.commons.lang3.ClassUtils.Interfaces;
+import org.apache.commons.lang3.Validate;
+
+/**
+ * <p>Utility reflection methods focused on {@link Method}s, originally from Commons BeanUtils.
+ * Differences from the BeanUtils version may be noted, especially where similar functionality
+ * already existed within Lang.
+ * </p>
+ *
+ * <h3>Known Limitations</h3>
+ * <h4>Accessing Public Methods In A Default Access Superclass</h4>
+ * <p>There is an issue when invoking {@code public} methods contained in a default access superclass on JREs prior to 1.4.
+ * Reflection locates these methods fine and correctly assigns them as {@code public}.
+ * However, an {@link IllegalAccessException} is thrown if the method is invoked.</p>
+ *
+ * <p>{@link MethodUtils} contains a workaround for this situation. 
+ * It will attempt to call {@link java.lang.reflect.AccessibleObject#setAccessible(boolean)} on this method.
+ * If this call succeeds, then the method can be invoked as normal.
+ * This call will only succeed when the application has sufficient security privileges. 
+ * If this call fails then the method may fail.</p>
+ *
+ * @since 2.5
+ */
+public class MethodUtils {
+
+    /**
+     * <p>{@link MethodUtils} instances should NOT be constructed in standard programming.
+     * Instead, the class should be used as
+     * {@code MethodUtils.getAccessibleMethod(method)}.</p>
+     *
+     * <p>This constructor is {@code public} to permit tools that require a JavaBean
+     * instance to operate.</p>
+     */
+    public MethodUtils() {
+        super();
+    }
+
+    /**
+     * <p>Invokes a named method without parameters.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *  
+     *  @since 3.4
+     */
+    public static Object invokeMethod(final Object object, final String methodName) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        return invokeMethod(object, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+    
+    /**
+     * <p>Invokes a named method without parameters.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,boolean forceAccess,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName)
+            throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
+        return invokeMethod(object, forceAccess, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     */
+    public static Object invokeMethod(final Object object, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeMethod(object, methodName, args, parameterTypes);
+    }
+    
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,boolean forceAccess,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeMethod(object, forceAccess, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     * @since 3.5
+     */
+/**
+ * <p>Invokes a named method whose parameter type matches the object type.</p>
+ *
+ * <p>This method supports calls to methods taking primitive parameters
+ * via passing in wrapping classes. So, for example, a {@code Boolean} object
+ * would match a {@code boolean} primitive.</p>
+ *
+ * @param object
+ * 		invoke method on this object
+ * @param forceAccess
+ * 		force access to invoke method even if it's not accessible
+ * @param methodName
+ * 		get method with this name
+ * @param args
+ * 		use these arguments - treat null as empty array
+ * @param parameterTypes
+ * 		match these parameters - treat null as empty array
+ * @return The value returned by the invoked method
+ * @throws NoSuchMethodException
+ * 		if there is no such accessible method
+ * @throws InvocationTargetException
+ * 		wraps an exception thrown by the method invoked
+ * @throws IllegalAccessException
+ * 		if the requested method is not accessible via reflection
+ * @since 3.5
+ */
+public static java.lang.Object invokeMethod(final java.lang.Object object, final boolean forceAccess, final java.lang.String methodName, java.lang.Object[] args, java.lang.Class<?>[] parameterTypes) throws java.lang.NoSuchMethodException, java.lang.IllegalAccessException, java.lang.reflect.InvocationTargetException {
+    parameterTypes = org.apache.commons.lang3.ArrayUtils.nullToEmpty(parameterTypes);
+    args = org.apache.commons.lang3.ArrayUtils.nullToEmpty(args);
+    final java.lang.String messagePrefix;
+    java.lang.reflect.Method method = null;
+    boolean isOriginallyAccessible = false;
+    java.lang.Object result = null;
+    try {
+        if (forceAccess) {
+            messagePrefix = "No such method: ";
+            method = org.apache.commons.lang3.reflect.MethodUtils.getMatchingMethod(object.getClass(), methodName, parameterTypes);
+            if (method != null) {
+                isOriginallyAccessible = method.isAccessible();
+                if (!isOriginallyAccessible) {
+                    method.setAccessible(true);
+                }
+            }
+        } else {
+            messagePrefix = "No such accessible method: ";
+            method = org.apache.commons.lang3.reflect.MethodUtils.getMatchingAccessibleMethod(object.getClass(), methodName, parameterTypes);
+        }
+        {
+            args = org.apache.commons.lang3.reflect.MethodUtils.toVarArgs(/* NPEX_NULL_EXP */
+            method, args);
+            result = method.invoke(object, args);
+        }
+    } finally {
+        if (((method != null) && forceAccess) && (method.isAccessible() != isOriginallyAccessible)) {
+            method.setAccessible(isOriginallyAccessible);
+        }
+    }
+    return result;
+}
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     */
+    public static Object invokeMethod(final Object object, final String methodName, 
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        return invokeMethod(object, false, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a method whose parameter types match exactly the object
+     * types.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod}(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     *
+     * @since 3.4
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        return invokeExactMethod(object, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+
+    /**
+     * <p>Invokes a method with no parameters.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod}(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeExactMethod(object, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a method whose parameter types match exactly the parameter
+     * types given.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        final Method method = getAccessibleMethod(object.getClass(), methodName,
+                parameterTypes);
+        if (method == null) {
+            throw new NoSuchMethodException("No such accessible method: "
+                    + methodName + "() on object: "
+                    + object.getClass().getName());
+        }
+        return method.invoke(object, args);
+    }
+
+    /**
+     * <p>Invokes a {@code static} method whose parameter types match exactly the parameter
+     * types given.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactStaticMethod(final Class<?> cls, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        final Method method = getAccessibleMethod(cls, methodName, parameterTypes);
+        if (method == null) {
+            throw new NoSuchMethodException("No such accessible method: "
+                    + methodName + "() on class: " + cls.getName());
+        }
+        return method.invoke(null, args);
+    }
+
+    /**
+     * <p>Invokes a named {@code static} method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} class
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeStaticMethod(Class, String, Object[], Class[])}.
+     * </p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeStaticMethod(final Class<?> cls, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeStaticMethod(cls, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a named {@code static} method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} class
+     * would match a {@code boolean} primitive.</p>
+     *
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeStaticMethod(final Class<?> cls, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        final Method method = getMatchingAccessibleMethod(cls, methodName,
+                parameterTypes);
+        if (method == null) {
+            throw new NoSuchMethodException("No such accessible method: "
+                    + methodName + "() on class: " + cls.getName());
+        }
+        args = toVarArgs(method, args);
+        return method.invoke(null, args);
+    }
+
+    private static Object[] toVarArgs(Method method, Object[] args) {
+        if (method.isVarArgs()) {
+            Class<?>[] methodParameterTypes = method.getParameterTypes();
+            args = getVarArgs(args, methodParameterTypes);
+        }
+        return args;
+    }
+
+    /**
+     * <p>Given an arguments array passed to a varargs method, return an array of arguments in the canonical form,
+     * i.e. an array with the declared number of parameters, and whose last parameter is an array of the varargs type.
+     * </p>
+     *
+     * @param args the array of arguments passed to the varags method
+     * @param methodParameterTypes the declared array of method parameter types
+     * @return an array of the variadic arguments passed to the method
+     * @since 3.5
+     */
+    static Object[] getVarArgs(Object[] args, Class<?>[] methodParameterTypes) {
+        if (args.length == methodParameterTypes.length
+                && args[args.length - 1].getClass().equals(methodParameterTypes[methodParameterTypes.length - 1])) {
+            // The args array is already in the canonical form for the method.
+            return args;
+        }
+
+        // Construct a new array matching the method's declared parameter types.
+        Object[] newArgs = new Object[methodParameterTypes.length];
+
+        // Copy the normal (non-varargs) parameters
+        System.arraycopy(args, 0, newArgs, 0, methodParameterTypes.length - 1);
+
+        // Construct a new array for the variadic parameters
+        Class<?> varArgComponentType = methodParameterTypes[methodParameterTypes.length - 1].getComponentType();
+        int varArgLength = args.length - methodParameterTypes.length + 1;
+
+        Object varArgsArray = Array.newInstance(ClassUtils.primitiveToWrapper(varArgComponentType), varArgLength);
+        // Copy the variadic arguments into the varargs array.
+        System.arraycopy(args, methodParameterTypes.length - 1, varArgsArray, 0, varArgLength);
+
+        if(varArgComponentType.isPrimitive()) {
+            // unbox from wrapper type to primitive type
+            varArgsArray = ArrayUtils.toPrimitive(varArgsArray);
+        }
+
+        // Store the varargs array in the last position of the array to return
+        newArgs[methodParameterTypes.length - 1] = varArgsArray;
+
+        // Return the canonical varargs array.
+        return newArgs;
+    }
+
+    /**
+     * <p>Invokes a {@code static} method whose parameter types match exactly the object
+     * types.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactStaticMethod(final Class<?> cls, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeExactStaticMethod(cls, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) with given name and parameters. If no such method
+     * can be found, return {@code null}.
+     * This is just a convenience wrapper for
+     * {@link #getAccessibleMethod(Method)}.</p>
+     *
+     * @param cls get method from this class
+     * @param methodName get method with this name
+     * @param parameterTypes with these parameters types
+     * @return The accessible method
+     */
+    public static Method getAccessibleMethod(final Class<?> cls, final String methodName,
+            final Class<?>... parameterTypes) {
+        try {
+            return getAccessibleMethod(cls.getMethod(methodName,
+                    parameterTypes));
+        } catch (final NoSuchMethodException e) {
+            return null;
+        }
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) that implements the specified Method. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * @param method The method that we wish to call
+     * @return The accessible method
+     */
+    public static Method getAccessibleMethod(Method method) {
+        if (!MemberUtils.isAccessible(method)) {
+            return null;
+        }
+        // If the declaring class is public, we are done
+        final Class<?> cls = method.getDeclaringClass();
+        if (Modifier.isPublic(cls.getModifiers())) {
+            return method;
+        }
+        final String methodName = method.getName();
+        final Class<?>[] parameterTypes = method.getParameterTypes();
+
+        // Check the implemented interfaces and subinterfaces
+        method = getAccessibleMethodFromInterfaceNest(cls, methodName,
+                parameterTypes);
+
+        // Check the superclass chain
+        if (method == null) {
+            method = getAccessibleMethodFromSuperclass(cls, methodName,
+                    parameterTypes);
+        }
+        return method;
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) by scanning through the superclasses. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * @param cls Class to be checked
+     * @param methodName Method name of the method we wish to call
+     * @param parameterTypes The parameter type signatures
+     * @return the accessible method or {@code null} if not found
+     */
+    private static Method getAccessibleMethodFromSuperclass(final Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        Class<?> parentClass = cls.getSuperclass();
+        while (parentClass != null) {
+            if (Modifier.isPublic(parentClass.getModifiers())) {
+                try {
+                    return parentClass.getMethod(methodName, parameterTypes);
+                } catch (final NoSuchMethodException e) {
+                    return null;
+                }
+            }
+            parentClass = parentClass.getSuperclass();
+        }
+        return null;
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) that implements the specified method, by scanning through
+     * all implemented interfaces and subinterfaces. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * <p>There isn't any good reason why this method must be {@code private}.
+     * It is because there doesn't seem any reason why other classes should
+     * call this rather than the higher level methods.</p>
+     *
+     * @param cls Parent class for the interfaces to be checked
+     * @param methodName Method name of the method we wish to call
+     * @param parameterTypes The parameter type signatures
+     * @return the accessible method or {@code null} if not found
+     */
+    private static Method getAccessibleMethodFromInterfaceNest(Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        // Search up the superclass chain
+        for (; cls != null; cls = cls.getSuperclass()) {
+
+            // Check the implemented interfaces of the parent class
+            final Class<?>[] interfaces = cls.getInterfaces();
+            for (int i = 0; i < interfaces.length; i++) {
+                // Is this interface public?
+                if (!Modifier.isPublic(interfaces[i].getModifiers())) {
+                    continue;
+                }
+                // Does the method exist on this interface?
+                try {
+                    return interfaces[i].getDeclaredMethod(methodName,
+                            parameterTypes);
+                } catch (final NoSuchMethodException e) { // NOPMD
+                    /*
+                     * Swallow, if no method is found after the loop then this
+                     * method returns null.
+                     */
+                }
+                // Recursively check our parent interfaces
+                final Method method = getAccessibleMethodFromInterfaceNest(interfaces[i],
+                        methodName, parameterTypes);
+                if (method != null) {
+                    return method;
+                }
+            }
+        }
+        return null;
+    }
+
+    /**
+     * <p>Finds an accessible method that matches the given name and has compatible parameters.
+     * Compatible parameters mean that every method parameter is assignable from 
+     * the given parameters.
+     * In other words, it finds a method with the given name 
+     * that will take the parameters given.</p>
+     *
+     * <p>This method is used by 
+     * {@link 
+     * #invokeMethod(Object object, String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * <p>This method can match primitive parameter by passing in wrapper classes.
+     * For example, a {@code Boolean} will match a primitive {@code boolean}
+     * parameter.
+     * </p>
+     *
+     * @param cls find method in this class
+     * @param methodName find method with this name
+     * @param parameterTypes find method with most compatible parameters 
+     * @return The accessible method
+     */
+    public static Method getMatchingAccessibleMethod(final Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        try {
+            final Method method = cls.getMethod(methodName, parameterTypes);
+            MemberUtils.setAccessibleWorkaround(method);
+            return method;
+        } catch (final NoSuchMethodException e) { // NOPMD - Swallow the exception
+        }
+        // search through all methods
+        Method bestMatch = null;
+        final Method[] methods = cls.getMethods();
+        for (final Method method : methods) {
+            // compare name and parameters
+            if (method.getName().equals(methodName) &&
+                    MemberUtils.isMatchingMethod(method, parameterTypes)) {
+                // get accessible version of method
+                final Method accessibleMethod = getAccessibleMethod(method);
+                if (accessibleMethod != null && (bestMatch == null || MemberUtils.compareMethodFit(
+                            accessibleMethod,
+                            bestMatch,
+                            parameterTypes) < 0)) {
+                    bestMatch = accessibleMethod;
+                }
+            }
+        }
+        if (bestMatch != null) {
+            MemberUtils.setAccessibleWorkaround(bestMatch);
+        }
+        return bestMatch;
+    }
+    
+    /**
+     * <p>Retrieves a method whether or not it's accessible. If no such method
+     * can be found, return {@code null}.</p>
+     * @param cls The class that will be subjected to the method search
+     * @param methodName The method that we wish to call
+     * @param parameterTypes Argument class types
+     * @return The method
+     * 
+     * @since 3.5
+     */
+    public static Method getMatchingMethod(final Class<?> cls, final String methodName,
+            final Class<?>... parameterTypes) {
+        Validate.notNull(cls, "Null class not allowed.");
+        Validate.notEmpty(methodName, "Null or blank methodName not allowed.");
+
+        // Address methods in superclasses
+        Method[] methodArray = cls.getDeclaredMethods();
+        List<Class<?>> superclassList = ClassUtils.getAllSuperclasses(cls);
+        for (Class<?> klass : superclassList) {
+            methodArray = ArrayUtils.addAll(methodArray, klass.getDeclaredMethods());
+        }
+
+        Method inexactMatch = null;
+        for (Method method : methodArray) {
+            if (methodName.equals(method.getName()) &&
+                    ArrayUtils.isEquals(parameterTypes, method.getParameterTypes())) {
+                return method;
+            } else if (methodName.equals(method.getName()) &&
+                    ClassUtils.isAssignable(parameterTypes, method.getParameterTypes(), true)) {
+                if (inexactMatch == null) {
+                    inexactMatch = method;
+                } else if (distance(parameterTypes, method.getParameterTypes())
+                        < distance(parameterTypes, inexactMatch.getParameterTypes())) {
+                    inexactMatch = method;
+                }
+            }
+
+        }
+        return inexactMatch;
+    }
+    
+    /**
+     * <p>Returns the aggregate number of inheritance hops between assignable argument class types.  Returns -1
+     * if the arguments aren't assignable.  Fills a specific purpose for getMatchingMethod and is not generalized.</p>
+     * @param classArray
+     * @param toClassArray
+     * @return the aggregate number of inheritance hops between assignable argument class types.
+     */
+    private static int distance(Class<?>[] classArray, Class<?>[] toClassArray) {
+        int answer = 0;
+
+        if (!ClassUtils.isAssignable(classArray, toClassArray, true)) {
+            return -1;
+        }
+        for (int offset = 0; offset < classArray.length; offset++) {
+            // Note InheritanceUtils.distance() uses different scoring system.
+            if (classArray[offset].equals(toClassArray[offset])) {
+                continue;
+            } else if (ClassUtils.isAssignable(classArray[offset], toClassArray[offset], true)
+                    && !ClassUtils.isAssignable(classArray[offset], toClassArray[offset], false)) {
+                answer++;
+            } else {
+                answer = answer + 2;
+            }
+        }
+
+        return answer;
+    }
+
+    /**
+     * Get the hierarchy of overridden methods down to {@code result} respecting generics.
+     * @param method lowest to consider
+     * @param interfacesBehavior whether to search interfaces, {@code null} {@code implies} false
+     * @return Set&lt;Method&gt; in ascending order from sub- to superclass
+     * @throws NullPointerException if the specified method is {@code null}
+     * @since 3.2
+     */
+    public static Set<Method> getOverrideHierarchy(final Method method, final Interfaces interfacesBehavior) {
+        Validate.notNull(method);
+        final Set<Method> result = new LinkedHashSet<Method>();
+        result.add(method);
+
+        final Class<?>[] parameterTypes = method.getParameterTypes();
+
+        final Class<?> declaringClass = method.getDeclaringClass();
+
+        final Iterator<Class<?>> hierarchy = ClassUtils.hierarchy(declaringClass, interfacesBehavior).iterator();
+        //skip the declaring class :P
+        hierarchy.next();
+        hierarchyTraversal: while (hierarchy.hasNext()) {
+            final Class<?> c = hierarchy.next();
+            final Method m = getMatchingAccessibleMethod(c, method.getName(), parameterTypes);
+            if (m == null) {
+                continue;
+            }
+            if (Arrays.equals(m.getParameterTypes(), parameterTypes)) {
+                // matches without generics
+                result.add(m);
+                continue;
+            }
+            // necessary to get arguments every time in the case that we are including interfaces
+            final Map<TypeVariable<?>, Type> typeArguments = TypeUtils.getTypeArguments(declaringClass, m.getDeclaringClass());
+            for (int i = 0; i < parameterTypes.length; i++) {
+                final Type childType = TypeUtils.unrollVariables(typeArguments, method.getGenericParameterTypes()[i]);
+                final Type parentType = TypeUtils.unrollVariables(typeArguments, m.getGenericParameterTypes()[i]);
+                if (!TypeUtils.equals(childType, parentType)) {
+                    continue hierarchyTraversal;
+                }
+            }
+            result.add(m);
+        }
+        return result;
+    }
+
+    /**
+     * Gets all methods of the given class that are annotated with the given annotation.
+     * @param cls
+     *            the {@link Class} to query
+     * @param annotationCls
+     *            the {@link java.lang.annotation.Annotation} that must be present on a method to be matched
+     * @return an array of Methods (possibly empty).
+     * @throws IllegalArgumentException
+     *            if the class or annotation are {@code null}
+     * @since 3.4
+     */
+    public static Method[] getMethodsWithAnnotation(final Class<?> cls, final Class<? extends Annotation> annotationCls) {
+        final List<Method> annotatedMethodsList = getMethodsListWithAnnotation(cls, annotationCls);
+        return annotatedMethodsList.toArray(new Method[annotatedMethodsList.size()]);
+    }
+
+    /**
+     * Gets all methods of the given class that are annotated with the given annotation.
+     * @param cls
+     *            the {@link Class} to query
+     * @param annotationCls
+     *            the {@link Annotation} that must be present on a method to be matched
+     * @return a list of Methods (possibly empty).
+     * @throws IllegalArgumentException
+     *            if the class or annotation are {@code null}
+     * @since 3.4
+     */
+    public static List<Method> getMethodsListWithAnnotation(final Class<?> cls, final Class<? extends Annotation> annotationCls) {
+        Validate.isTrue(cls != null, "The class must not be null");
+        Validate.isTrue(annotationCls != null, "The annotation class must not be null");
+        final Method[] allMethods = cls.getMethods();
+        final List<Method> annotatedMethods = new ArrayList<Method>();
+        for (final Method method : allMethods) {
+            if (method.getAnnotation(annotationCls) != null) {
+                annotatedMethods.add(method);
+            }
+        }
+        return annotatedMethods;
+    }
+
+}
diff --git a/Java/commons-lang-MethodUtils_229/metadata.json b/Java/commons-lang-MethodUtils_229/metadata.json
new file mode 100644
index 000000000..cf865ec4f
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_229/metadata.json
@@ -0,0 +1,21 @@
+{
+  "language": "java",
+  "id": "commons-lang-MethodUtils_229",
+  "buggyPath": ".",
+  "referencePath": null,
+  "buildCommand": "mvn package -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100 -DskipTests=true -DskipITs=true -Dtest=None -DfailIfNoTests=false",
+  "testCommand": "mvn test -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100",
+  "categories": [
+    "safety",
+    "npe"
+  ],
+  "npe": {
+    "filepath": "src/main/java/org/apache/commons/lang3/reflect/MethodUtils.java",
+    "line": 249,
+    "npe_method": "invokeMethod",
+    "deref_field": "method",
+    "npe_class": "MethodUtils",
+    "repo": "commons-lang",
+    "bug_id": "MethodUtils_229"
+  }
+}
diff --git a/Java/commons-lang-MethodUtils_229/npe.json b/Java/commons-lang-MethodUtils_229/npe.json
new file mode 100644
index 000000000..415479ec6
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_229/npe.json
@@ -0,0 +1,7 @@
+{
+    "filepath": "src/main/java/org/apache/commons/lang3/reflect/MethodUtils.java",
+    "line": 249,
+    "npe_method": "invokeMethod",
+    "deref_field": "method",
+    "npe_class": "MethodUtils"
+}
\ No newline at end of file
diff --git a/Java/commons-lang-MethodUtils_349/Dockerfile b/Java/commons-lang-MethodUtils_349/Dockerfile
new file mode 100644
index 000000000..7b7fbe349
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_349/Dockerfile
@@ -0,0 +1,18 @@
+FROM ghcr.io/kupl/starlab-benchmarks/java-base:commons-lang
+
+ENV TZ=Asia/Seoul
+
+COPY ./metadata.json .
+COPY ./npe.json .
+COPY ./buggy.java /tmp/buggy.java
+RUN export BUGGY_PATH=$(cat metadata.json | jq -r ".npe.filepath") \
+    && export BUGGY_LINE=$(cat metadata.json | jq -r ".npe.line") \
+    && export BUGGY_MTHD=$(cat metadata.json | jq -r ".npe.npe_method") \
+    && mv /tmp/buggy.java $BUGGY_PATH \
+    && echo "[{\"filepath\": \"$BUGGY_PATH\", \"line\": $BUGGY_LINE, \"method_name\": \"$BUGGY_MTHD\"}]" | jq . > traces.json
+
+RUN git init . && git add -A
+
+RUN $(cat metadata.json | jq -r ".buildCommand")
+
+RUN $(cat metadata.json | jq -r ".testCommand"); if [ $? -eq 0 ]; then exit 1; fi
diff --git a/Java/commons-lang-MethodUtils_349/buggy.java b/Java/commons-lang-MethodUtils_349/buggy.java
new file mode 100644
index 000000000..eb691f8b6
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_349/buggy.java
@@ -0,0 +1,891 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.lang3.reflect;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Array;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.lang.reflect.Type;
+import java.lang.reflect.TypeVariable;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.commons.lang3.ArrayUtils;
+import org.apache.commons.lang3.ClassUtils;
+import org.apache.commons.lang3.ClassUtils.Interfaces;
+import org.apache.commons.lang3.Validate;
+
+/**
+ * <p>Utility reflection methods focused on {@link Method}s, originally from Commons BeanUtils.
+ * Differences from the BeanUtils version may be noted, especially where similar functionality
+ * already existed within Lang.
+ * </p>
+ *
+ * <h3>Known Limitations</h3>
+ * <h4>Accessing Public Methods In A Default Access Superclass</h4>
+ * <p>There is an issue when invoking {@code public} methods contained in a default access superclass on JREs prior to 1.4.
+ * Reflection locates these methods fine and correctly assigns them as {@code public}.
+ * However, an {@link IllegalAccessException} is thrown if the method is invoked.</p>
+ *
+ * <p>{@link MethodUtils} contains a workaround for this situation. 
+ * It will attempt to call {@link java.lang.reflect.AccessibleObject#setAccessible(boolean)} on this method.
+ * If this call succeeds, then the method can be invoked as normal.
+ * This call will only succeed when the application has sufficient security privileges. 
+ * If this call fails then the method may fail.</p>
+ *
+ * @since 2.5
+ */
+public class MethodUtils {
+
+    /**
+     * <p>{@link MethodUtils} instances should NOT be constructed in standard programming.
+     * Instead, the class should be used as
+     * {@code MethodUtils.getAccessibleMethod(method)}.</p>
+     *
+     * <p>This constructor is {@code public} to permit tools that require a JavaBean
+     * instance to operate.</p>
+     */
+    public MethodUtils() {
+        super();
+    }
+
+    /**
+     * <p>Invokes a named method without parameters.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *  
+     *  @since 3.4
+     */
+    public static Object invokeMethod(final Object object, final String methodName) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        return invokeMethod(object, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+    
+    /**
+     * <p>Invokes a named method without parameters.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,boolean forceAccess,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName)
+            throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
+        return invokeMethod(object, forceAccess, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     */
+    public static Object invokeMethod(final Object object, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeMethod(object, methodName, args, parameterTypes);
+    }
+    
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,boolean forceAccess,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeMethod(object, forceAccess, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        args = ArrayUtils.nullToEmpty(args);
+
+        final String messagePrefix;
+        Method method = null;
+        boolean isOriginallyAccessible = false;
+        Object result = null;
+
+        try {
+            if (forceAccess) {
+                messagePrefix = "No such method: ";
+                method = getMatchingMethod(object.getClass(),
+                        methodName, parameterTypes);
+                if (method != null) {
+                    isOriginallyAccessible = method.isAccessible();
+                    if (!isOriginallyAccessible) {
+                        method.setAccessible(true);
+                    }
+                }
+            } else {
+                messagePrefix = "No such accessible method: ";
+                method = getMatchingAccessibleMethod(object.getClass(),
+                        methodName, parameterTypes);
+            }
+
+            if (method == null) {
+                throw new NoSuchMethodException(messagePrefix
+                        + methodName + "() on object: "
+                        + object.getClass().getName());
+            }
+            args = toVarArgs(method, args);
+
+            result = method.invoke(object, args);
+        }
+        finally {
+            if (method != null && forceAccess && method.isAccessible() != isOriginallyAccessible) {
+                method.setAccessible(isOriginallyAccessible);
+            }
+        }
+
+        return result;
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     */
+    public static Object invokeMethod(final Object object, final String methodName, 
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        return invokeMethod(object, false, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a method whose parameter types match exactly the object
+     * types.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod}(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     *
+     * @since 3.4
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        return invokeExactMethod(object, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+
+    /**
+     * <p>Invokes a method with no parameters.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod}(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeExactMethod(object, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a method whose parameter types match exactly the parameter
+     * types given.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+/**
+ * <p>Invokes a method whose parameter types match exactly the parameter
+ * types given.</p>
+ *
+ * <p>This uses reflection to invoke the method obtained from a call to
+ * {@link #getAccessibleMethod(Class,String,Class[])}.</p>
+ *
+ * @param object
+ * 		invoke method on this object
+ * @param methodName
+ * 		get method with this name
+ * @param args
+ * 		use these arguments - treat null as empty array
+ * @param parameterTypes
+ * 		match these parameters - treat {@code null} as empty array
+ * @return The value returned by the invoked method
+ * @throws NoSuchMethodException
+ * 		if there is no such accessible method
+ * @throws InvocationTargetException
+ * 		wraps an exception thrown by the
+ * 		method invoked
+ * @throws IllegalAccessException
+ * 		if the requested method is not accessible
+ * 		via reflection
+ */
+public static java.lang.Object invokeExactMethod(final java.lang.Object object, final java.lang.String methodName, java.lang.Object[] args, java.lang.Class<?>[] parameterTypes) throws java.lang.NoSuchMethodException, java.lang.IllegalAccessException, java.lang.reflect.InvocationTargetException {
+    args = org.apache.commons.lang3.ArrayUtils.nullToEmpty(args);
+    parameterTypes = org.apache.commons.lang3.ArrayUtils.nullToEmpty(parameterTypes);
+    final java.lang.reflect.Method method = org.apache.commons.lang3.reflect.MethodUtils.getAccessibleMethod(object.getClass(), methodName, parameterTypes);
+    {
+        return /* NPEX_NULL_EXP */
+        method.invoke(object, args);
+    }
+}
+
+    /**
+     * <p>Invokes a {@code static} method whose parameter types match exactly the parameter
+     * types given.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactStaticMethod(final Class<?> cls, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        final Method method = getAccessibleMethod(cls, methodName, parameterTypes);
+        if (method == null) {
+            throw new NoSuchMethodException("No such accessible method: "
+                    + methodName + "() on class: " + cls.getName());
+        }
+        return method.invoke(null, args);
+    }
+
+    /**
+     * <p>Invokes a named {@code static} method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} class
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeStaticMethod(Class, String, Object[], Class[])}.
+     * </p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeStaticMethod(final Class<?> cls, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeStaticMethod(cls, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a named {@code static} method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} class
+     * would match a {@code boolean} primitive.</p>
+     *
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeStaticMethod(final Class<?> cls, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        final Method method = getMatchingAccessibleMethod(cls, methodName,
+                parameterTypes);
+        if (method == null) {
+            throw new NoSuchMethodException("No such accessible method: "
+                    + methodName + "() on class: " + cls.getName());
+        }
+        args = toVarArgs(method, args);
+        return method.invoke(null, args);
+    }
+
+    private static Object[] toVarArgs(Method method, Object[] args) {
+        if (method.isVarArgs()) {
+            Class<?>[] methodParameterTypes = method.getParameterTypes();
+            args = getVarArgs(args, methodParameterTypes);
+        }
+        return args;
+    }
+
+    /**
+     * <p>Given an arguments array passed to a varargs method, return an array of arguments in the canonical form,
+     * i.e. an array with the declared number of parameters, and whose last parameter is an array of the varargs type.
+     * </p>
+     *
+     * @param args the array of arguments passed to the varags method
+     * @param methodParameterTypes the declared array of method parameter types
+     * @return an array of the variadic arguments passed to the method
+     * @since 3.5
+     */
+    static Object[] getVarArgs(Object[] args, Class<?>[] methodParameterTypes) {
+        if (args.length == methodParameterTypes.length
+                && args[args.length - 1].getClass().equals(methodParameterTypes[methodParameterTypes.length - 1])) {
+            // The args array is already in the canonical form for the method.
+            return args;
+        }
+
+        // Construct a new array matching the method's declared parameter types.
+        Object[] newArgs = new Object[methodParameterTypes.length];
+
+        // Copy the normal (non-varargs) parameters
+        System.arraycopy(args, 0, newArgs, 0, methodParameterTypes.length - 1);
+
+        // Construct a new array for the variadic parameters
+        Class<?> varArgComponentType = methodParameterTypes[methodParameterTypes.length - 1].getComponentType();
+        int varArgLength = args.length - methodParameterTypes.length + 1;
+
+        Object varArgsArray = Array.newInstance(ClassUtils.primitiveToWrapper(varArgComponentType), varArgLength);
+        // Copy the variadic arguments into the varargs array.
+        System.arraycopy(args, methodParameterTypes.length - 1, varArgsArray, 0, varArgLength);
+
+        if(varArgComponentType.isPrimitive()) {
+            // unbox from wrapper type to primitive type
+            varArgsArray = ArrayUtils.toPrimitive(varArgsArray);
+        }
+
+        // Store the varargs array in the last position of the array to return
+        newArgs[methodParameterTypes.length - 1] = varArgsArray;
+
+        // Return the canonical varargs array.
+        return newArgs;
+    }
+
+    /**
+     * <p>Invokes a {@code static} method whose parameter types match exactly the object
+     * types.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactStaticMethod(final Class<?> cls, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeExactStaticMethod(cls, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) with given name and parameters. If no such method
+     * can be found, return {@code null}.
+     * This is just a convenience wrapper for
+     * {@link #getAccessibleMethod(Method)}.</p>
+     *
+     * @param cls get method from this class
+     * @param methodName get method with this name
+     * @param parameterTypes with these parameters types
+     * @return The accessible method
+     */
+    public static Method getAccessibleMethod(final Class<?> cls, final String methodName,
+            final Class<?>... parameterTypes) {
+        try {
+            return getAccessibleMethod(cls.getMethod(methodName,
+                    parameterTypes));
+        } catch (final NoSuchMethodException e) {
+            return null;
+        }
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) that implements the specified Method. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * @param method The method that we wish to call
+     * @return The accessible method
+     */
+    public static Method getAccessibleMethod(Method method) {
+        if (!MemberUtils.isAccessible(method)) {
+            return null;
+        }
+        // If the declaring class is public, we are done
+        final Class<?> cls = method.getDeclaringClass();
+        if (Modifier.isPublic(cls.getModifiers())) {
+            return method;
+        }
+        final String methodName = method.getName();
+        final Class<?>[] parameterTypes = method.getParameterTypes();
+
+        // Check the implemented interfaces and subinterfaces
+        method = getAccessibleMethodFromInterfaceNest(cls, methodName,
+                parameterTypes);
+
+        // Check the superclass chain
+        if (method == null) {
+            method = getAccessibleMethodFromSuperclass(cls, methodName,
+                    parameterTypes);
+        }
+        return method;
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) by scanning through the superclasses. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * @param cls Class to be checked
+     * @param methodName Method name of the method we wish to call
+     * @param parameterTypes The parameter type signatures
+     * @return the accessible method or {@code null} if not found
+     */
+    private static Method getAccessibleMethodFromSuperclass(final Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        Class<?> parentClass = cls.getSuperclass();
+        while (parentClass != null) {
+            if (Modifier.isPublic(parentClass.getModifiers())) {
+                try {
+                    return parentClass.getMethod(methodName, parameterTypes);
+                } catch (final NoSuchMethodException e) {
+                    return null;
+                }
+            }
+            parentClass = parentClass.getSuperclass();
+        }
+        return null;
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) that implements the specified method, by scanning through
+     * all implemented interfaces and subinterfaces. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * <p>There isn't any good reason why this method must be {@code private}.
+     * It is because there doesn't seem any reason why other classes should
+     * call this rather than the higher level methods.</p>
+     *
+     * @param cls Parent class for the interfaces to be checked
+     * @param methodName Method name of the method we wish to call
+     * @param parameterTypes The parameter type signatures
+     * @return the accessible method or {@code null} if not found
+     */
+    private static Method getAccessibleMethodFromInterfaceNest(Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        // Search up the superclass chain
+        for (; cls != null; cls = cls.getSuperclass()) {
+
+            // Check the implemented interfaces of the parent class
+            final Class<?>[] interfaces = cls.getInterfaces();
+            for (int i = 0; i < interfaces.length; i++) {
+                // Is this interface public?
+                if (!Modifier.isPublic(interfaces[i].getModifiers())) {
+                    continue;
+                }
+                // Does the method exist on this interface?
+                try {
+                    return interfaces[i].getDeclaredMethod(methodName,
+                            parameterTypes);
+                } catch (final NoSuchMethodException e) { // NOPMD
+                    /*
+                     * Swallow, if no method is found after the loop then this
+                     * method returns null.
+                     */
+                }
+                // Recursively check our parent interfaces
+                final Method method = getAccessibleMethodFromInterfaceNest(interfaces[i],
+                        methodName, parameterTypes);
+                if (method != null) {
+                    return method;
+                }
+            }
+        }
+        return null;
+    }
+
+    /**
+     * <p>Finds an accessible method that matches the given name and has compatible parameters.
+     * Compatible parameters mean that every method parameter is assignable from 
+     * the given parameters.
+     * In other words, it finds a method with the given name 
+     * that will take the parameters given.</p>
+     *
+     * <p>This method is used by 
+     * {@link 
+     * #invokeMethod(Object object, String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * <p>This method can match primitive parameter by passing in wrapper classes.
+     * For example, a {@code Boolean} will match a primitive {@code boolean}
+     * parameter.
+     * </p>
+     *
+     * @param cls find method in this class
+     * @param methodName find method with this name
+     * @param parameterTypes find method with most compatible parameters 
+     * @return The accessible method
+     */
+    public static Method getMatchingAccessibleMethod(final Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        try {
+            final Method method = cls.getMethod(methodName, parameterTypes);
+            MemberUtils.setAccessibleWorkaround(method);
+            return method;
+        } catch (final NoSuchMethodException e) { // NOPMD - Swallow the exception
+        }
+        // search through all methods
+        Method bestMatch = null;
+        final Method[] methods = cls.getMethods();
+        for (final Method method : methods) {
+            // compare name and parameters
+            if (method.getName().equals(methodName) &&
+                    MemberUtils.isMatchingMethod(method, parameterTypes)) {
+                // get accessible version of method
+                final Method accessibleMethod = getAccessibleMethod(method);
+                if (accessibleMethod != null && (bestMatch == null || MemberUtils.compareMethodFit(
+                            accessibleMethod,
+                            bestMatch,
+                            parameterTypes) < 0)) {
+                    bestMatch = accessibleMethod;
+                }
+            }
+        }
+        if (bestMatch != null) {
+            MemberUtils.setAccessibleWorkaround(bestMatch);
+        }
+        return bestMatch;
+    }
+    
+    /**
+     * <p>Retrieves a method whether or not it's accessible. If no such method
+     * can be found, return {@code null}.</p>
+     * @param cls The class that will be subjected to the method search
+     * @param methodName The method that we wish to call
+     * @param parameterTypes Argument class types
+     * @return The method
+     * 
+     * @since 3.5
+     */
+    public static Method getMatchingMethod(final Class<?> cls, final String methodName,
+            final Class<?>... parameterTypes) {
+        Validate.notNull(cls, "Null class not allowed.");
+        Validate.notEmpty(methodName, "Null or blank methodName not allowed.");
+
+        // Address methods in superclasses
+        Method[] methodArray = cls.getDeclaredMethods();
+        List<Class<?>> superclassList = ClassUtils.getAllSuperclasses(cls);
+        for (Class<?> klass : superclassList) {
+            methodArray = ArrayUtils.addAll(methodArray, klass.getDeclaredMethods());
+        }
+
+        Method inexactMatch = null;
+        for (Method method : methodArray) {
+            if (methodName.equals(method.getName()) &&
+                    ArrayUtils.isEquals(parameterTypes, method.getParameterTypes())) {
+                return method;
+            } else if (methodName.equals(method.getName()) &&
+                    ClassUtils.isAssignable(parameterTypes, method.getParameterTypes(), true)) {
+                if (inexactMatch == null) {
+                    inexactMatch = method;
+                } else if (distance(parameterTypes, method.getParameterTypes())
+                        < distance(parameterTypes, inexactMatch.getParameterTypes())) {
+                    inexactMatch = method;
+                }
+            }
+
+        }
+        return inexactMatch;
+    }
+    
+    /**
+     * <p>Returns the aggregate number of inheritance hops between assignable argument class types.  Returns -1
+     * if the arguments aren't assignable.  Fills a specific purpose for getMatchingMethod and is not generalized.</p>
+     * @param classArray
+     * @param toClassArray
+     * @return the aggregate number of inheritance hops between assignable argument class types.
+     */
+    private static int distance(Class<?>[] classArray, Class<?>[] toClassArray) {
+        int answer = 0;
+
+        if (!ClassUtils.isAssignable(classArray, toClassArray, true)) {
+            return -1;
+        }
+        for (int offset = 0; offset < classArray.length; offset++) {
+            // Note InheritanceUtils.distance() uses different scoring system.
+            if (classArray[offset].equals(toClassArray[offset])) {
+                continue;
+            } else if (ClassUtils.isAssignable(classArray[offset], toClassArray[offset], true)
+                    && !ClassUtils.isAssignable(classArray[offset], toClassArray[offset], false)) {
+                answer++;
+            } else {
+                answer = answer + 2;
+            }
+        }
+
+        return answer;
+    }
+
+    /**
+     * Get the hierarchy of overridden methods down to {@code result} respecting generics.
+     * @param method lowest to consider
+     * @param interfacesBehavior whether to search interfaces, {@code null} {@code implies} false
+     * @return Set&lt;Method&gt; in ascending order from sub- to superclass
+     * @throws NullPointerException if the specified method is {@code null}
+     * @since 3.2
+     */
+    public static Set<Method> getOverrideHierarchy(final Method method, final Interfaces interfacesBehavior) {
+        Validate.notNull(method);
+        final Set<Method> result = new LinkedHashSet<Method>();
+        result.add(method);
+
+        final Class<?>[] parameterTypes = method.getParameterTypes();
+
+        final Class<?> declaringClass = method.getDeclaringClass();
+
+        final Iterator<Class<?>> hierarchy = ClassUtils.hierarchy(declaringClass, interfacesBehavior).iterator();
+        //skip the declaring class :P
+        hierarchy.next();
+        hierarchyTraversal: while (hierarchy.hasNext()) {
+            final Class<?> c = hierarchy.next();
+            final Method m = getMatchingAccessibleMethod(c, method.getName(), parameterTypes);
+            if (m == null) {
+                continue;
+            }
+            if (Arrays.equals(m.getParameterTypes(), parameterTypes)) {
+                // matches without generics
+                result.add(m);
+                continue;
+            }
+            // necessary to get arguments every time in the case that we are including interfaces
+            final Map<TypeVariable<?>, Type> typeArguments = TypeUtils.getTypeArguments(declaringClass, m.getDeclaringClass());
+            for (int i = 0; i < parameterTypes.length; i++) {
+                final Type childType = TypeUtils.unrollVariables(typeArguments, method.getGenericParameterTypes()[i]);
+                final Type parentType = TypeUtils.unrollVariables(typeArguments, m.getGenericParameterTypes()[i]);
+                if (!TypeUtils.equals(childType, parentType)) {
+                    continue hierarchyTraversal;
+                }
+            }
+            result.add(m);
+        }
+        return result;
+    }
+
+    /**
+     * Gets all methods of the given class that are annotated with the given annotation.
+     * @param cls
+     *            the {@link Class} to query
+     * @param annotationCls
+     *            the {@link java.lang.annotation.Annotation} that must be present on a method to be matched
+     * @return an array of Methods (possibly empty).
+     * @throws IllegalArgumentException
+     *            if the class or annotation are {@code null}
+     * @since 3.4
+     */
+    public static Method[] getMethodsWithAnnotation(final Class<?> cls, final Class<? extends Annotation> annotationCls) {
+        final List<Method> annotatedMethodsList = getMethodsListWithAnnotation(cls, annotationCls);
+        return annotatedMethodsList.toArray(new Method[annotatedMethodsList.size()]);
+    }
+
+    /**
+     * Gets all methods of the given class that are annotated with the given annotation.
+     * @param cls
+     *            the {@link Class} to query
+     * @param annotationCls
+     *            the {@link Annotation} that must be present on a method to be matched
+     * @return a list of Methods (possibly empty).
+     * @throws IllegalArgumentException
+     *            if the class or annotation are {@code null}
+     * @since 3.4
+     */
+    public static List<Method> getMethodsListWithAnnotation(final Class<?> cls, final Class<? extends Annotation> annotationCls) {
+        Validate.isTrue(cls != null, "The class must not be null");
+        Validate.isTrue(annotationCls != null, "The annotation class must not be null");
+        final Method[] allMethods = cls.getMethods();
+        final List<Method> annotatedMethods = new ArrayList<Method>();
+        for (final Method method : allMethods) {
+            if (method.getAnnotation(annotationCls) != null) {
+                annotatedMethods.add(method);
+            }
+        }
+        return annotatedMethods;
+    }
+
+}
diff --git a/Java/commons-lang-MethodUtils_349/metadata.json b/Java/commons-lang-MethodUtils_349/metadata.json
new file mode 100644
index 000000000..4a54398eb
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_349/metadata.json
@@ -0,0 +1,21 @@
+{
+  "language": "java",
+  "id": "commons-lang-MethodUtils_349",
+  "buggyPath": ".",
+  "referencePath": null,
+  "buildCommand": "mvn package -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100 -DskipTests=true -DskipITs=true -Dtest=None -DfailIfNoTests=false",
+  "testCommand": "mvn test -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100",
+  "categories": [
+    "safety",
+    "npe"
+  ],
+  "npe": {
+    "filepath": "src/main/java/org/apache/commons/lang3/reflect/MethodUtils.java",
+    "line": 372,
+    "npe_method": "invokeExactMethod",
+    "deref_field": "method",
+    "npe_class": "MethodUtils",
+    "repo": "commons-lang",
+    "bug_id": "MethodUtils_349"
+  }
+}
diff --git a/Java/commons-lang-MethodUtils_349/npe.json b/Java/commons-lang-MethodUtils_349/npe.json
new file mode 100644
index 000000000..d2613a7f0
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_349/npe.json
@@ -0,0 +1,7 @@
+{
+    "filepath": "src/main/java/org/apache/commons/lang3/reflect/MethodUtils.java",
+    "line": 372,
+    "npe_method": "invokeExactMethod",
+    "deref_field": "method",
+    "npe_class": "MethodUtils"
+}
\ No newline at end of file
diff --git a/Java/commons-lang-MethodUtils_383/Dockerfile b/Java/commons-lang-MethodUtils_383/Dockerfile
new file mode 100644
index 000000000..7b7fbe349
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_383/Dockerfile
@@ -0,0 +1,18 @@
+FROM ghcr.io/kupl/starlab-benchmarks/java-base:commons-lang
+
+ENV TZ=Asia/Seoul
+
+COPY ./metadata.json .
+COPY ./npe.json .
+COPY ./buggy.java /tmp/buggy.java
+RUN export BUGGY_PATH=$(cat metadata.json | jq -r ".npe.filepath") \
+    && export BUGGY_LINE=$(cat metadata.json | jq -r ".npe.line") \
+    && export BUGGY_MTHD=$(cat metadata.json | jq -r ".npe.npe_method") \
+    && mv /tmp/buggy.java $BUGGY_PATH \
+    && echo "[{\"filepath\": \"$BUGGY_PATH\", \"line\": $BUGGY_LINE, \"method_name\": \"$BUGGY_MTHD\"}]" | jq . > traces.json
+
+RUN git init . && git add -A
+
+RUN $(cat metadata.json | jq -r ".buildCommand")
+
+RUN $(cat metadata.json | jq -r ".testCommand"); if [ $? -eq 0 ]; then exit 1; fi
diff --git a/Java/commons-lang-MethodUtils_383/buggy.java b/Java/commons-lang-MethodUtils_383/buggy.java
new file mode 100644
index 000000000..5249b6bfc
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_383/buggy.java
@@ -0,0 +1,893 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.lang3.reflect;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Array;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.lang.reflect.Type;
+import java.lang.reflect.TypeVariable;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.commons.lang3.ArrayUtils;
+import org.apache.commons.lang3.ClassUtils;
+import org.apache.commons.lang3.ClassUtils.Interfaces;
+import org.apache.commons.lang3.Validate;
+
+/**
+ * <p>Utility reflection methods focused on {@link Method}s, originally from Commons BeanUtils.
+ * Differences from the BeanUtils version may be noted, especially where similar functionality
+ * already existed within Lang.
+ * </p>
+ *
+ * <h3>Known Limitations</h3>
+ * <h4>Accessing Public Methods In A Default Access Superclass</h4>
+ * <p>There is an issue when invoking {@code public} methods contained in a default access superclass on JREs prior to 1.4.
+ * Reflection locates these methods fine and correctly assigns them as {@code public}.
+ * However, an {@link IllegalAccessException} is thrown if the method is invoked.</p>
+ *
+ * <p>{@link MethodUtils} contains a workaround for this situation. 
+ * It will attempt to call {@link java.lang.reflect.AccessibleObject#setAccessible(boolean)} on this method.
+ * If this call succeeds, then the method can be invoked as normal.
+ * This call will only succeed when the application has sufficient security privileges. 
+ * If this call fails then the method may fail.</p>
+ *
+ * @since 2.5
+ */
+public class MethodUtils {
+
+    /**
+     * <p>{@link MethodUtils} instances should NOT be constructed in standard programming.
+     * Instead, the class should be used as
+     * {@code MethodUtils.getAccessibleMethod(method)}.</p>
+     *
+     * <p>This constructor is {@code public} to permit tools that require a JavaBean
+     * instance to operate.</p>
+     */
+    public MethodUtils() {
+        super();
+    }
+
+    /**
+     * <p>Invokes a named method without parameters.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *  
+     *  @since 3.4
+     */
+    public static Object invokeMethod(final Object object, final String methodName) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        return invokeMethod(object, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+    
+    /**
+     * <p>Invokes a named method without parameters.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,boolean forceAccess,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName)
+            throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
+        return invokeMethod(object, forceAccess, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     */
+    public static Object invokeMethod(final Object object, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeMethod(object, methodName, args, parameterTypes);
+    }
+    
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,boolean forceAccess,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeMethod(object, forceAccess, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        args = ArrayUtils.nullToEmpty(args);
+
+        final String messagePrefix;
+        Method method = null;
+        boolean isOriginallyAccessible = false;
+        Object result = null;
+
+        try {
+            if (forceAccess) {
+                messagePrefix = "No such method: ";
+                method = getMatchingMethod(object.getClass(),
+                        methodName, parameterTypes);
+                if (method != null) {
+                    isOriginallyAccessible = method.isAccessible();
+                    if (!isOriginallyAccessible) {
+                        method.setAccessible(true);
+                    }
+                }
+            } else {
+                messagePrefix = "No such accessible method: ";
+                method = getMatchingAccessibleMethod(object.getClass(),
+                        methodName, parameterTypes);
+            }
+
+            if (method == null) {
+                throw new NoSuchMethodException(messagePrefix
+                        + methodName + "() on object: "
+                        + object.getClass().getName());
+            }
+            args = toVarArgs(method, args);
+
+            result = method.invoke(object, args);
+        }
+        finally {
+            if (method != null && forceAccess && method.isAccessible() != isOriginallyAccessible) {
+                method.setAccessible(isOriginallyAccessible);
+            }
+        }
+
+        return result;
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     */
+    public static Object invokeMethod(final Object object, final String methodName, 
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        return invokeMethod(object, false, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a method whose parameter types match exactly the object
+     * types.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod}(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     *
+     * @since 3.4
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        return invokeExactMethod(object, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+
+    /**
+     * <p>Invokes a method with no parameters.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod}(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeExactMethod(object, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a method whose parameter types match exactly the parameter
+     * types given.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        final Method method = getAccessibleMethod(object.getClass(), methodName,
+                parameterTypes);
+        if (method == null) {
+            throw new NoSuchMethodException("No such accessible method: "
+                    + methodName + "() on object: "
+                    + object.getClass().getName());
+        }
+        return method.invoke(object, args);
+    }
+
+    /**
+     * <p>Invokes a {@code static} method whose parameter types match exactly the parameter
+     * types given.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+/**
+ * <p>Invokes a {@code static} method whose parameter types match exactly the parameter
+ * types given.</p>
+ *
+ * <p>This uses reflection to invoke the method obtained from a call to
+ * {@link #getAccessibleMethod(Class, String, Class[])}.</p>
+ *
+ * @param cls
+ * 		invoke static method on this class
+ * @param methodName
+ * 		get method with this name
+ * @param args
+ * 		use these arguments - treat {@code null} as empty array
+ * @param parameterTypes
+ * 		match these parameters - treat {@code null} as empty array
+ * @return The value returned by the invoked method
+ * @throws NoSuchMethodException
+ * 		if there is no such accessible method
+ * @throws InvocationTargetException
+ * 		wraps an exception thrown by the
+ * 		method invoked
+ * @throws IllegalAccessException
+ * 		if the requested method is not accessible
+ * 		via reflection
+ */
+public static java.lang.Object invokeExactStaticMethod(final java.lang.Class<?> cls, final java.lang.String methodName, java.lang.Object[] args, java.lang.Class<?>[] parameterTypes) throws java.lang.NoSuchMethodException, java.lang.IllegalAccessException, java.lang.reflect.InvocationTargetException {
+    args = org.apache.commons.lang3.ArrayUtils.nullToEmpty(args);
+    parameterTypes = org.apache.commons.lang3.ArrayUtils.nullToEmpty(parameterTypes);
+    final java.lang.reflect.Method method = org.apache.commons.lang3.reflect.MethodUtils.getAccessibleMethod(cls, methodName, parameterTypes);
+    {
+        return /* NPEX_NULL_EXP */
+        method.invoke(null, args);
+    }
+}
+
+    /**
+     * <p>Invokes a named {@code static} method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} class
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeStaticMethod(Class, String, Object[], Class[])}.
+     * </p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeStaticMethod(final Class<?> cls, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeStaticMethod(cls, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a named {@code static} method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} class
+     * would match a {@code boolean} primitive.</p>
+     *
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeStaticMethod(final Class<?> cls, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        final Method method = getMatchingAccessibleMethod(cls, methodName,
+                parameterTypes);
+        if (method == null) {
+            throw new NoSuchMethodException("No such accessible method: "
+                    + methodName + "() on class: " + cls.getName());
+        }
+        args = toVarArgs(method, args);
+        return method.invoke(null, args);
+    }
+
+    private static Object[] toVarArgs(Method method, Object[] args) {
+        if (method.isVarArgs()) {
+            Class<?>[] methodParameterTypes = method.getParameterTypes();
+            args = getVarArgs(args, methodParameterTypes);
+        }
+        return args;
+    }
+
+    /**
+     * <p>Given an arguments array passed to a varargs method, return an array of arguments in the canonical form,
+     * i.e. an array with the declared number of parameters, and whose last parameter is an array of the varargs type.
+     * </p>
+     *
+     * @param args the array of arguments passed to the varags method
+     * @param methodParameterTypes the declared array of method parameter types
+     * @return an array of the variadic arguments passed to the method
+     * @since 3.5
+     */
+    static Object[] getVarArgs(Object[] args, Class<?>[] methodParameterTypes) {
+        if (args.length == methodParameterTypes.length
+                && args[args.length - 1].getClass().equals(methodParameterTypes[methodParameterTypes.length - 1])) {
+            // The args array is already in the canonical form for the method.
+            return args;
+        }
+
+        // Construct a new array matching the method's declared parameter types.
+        Object[] newArgs = new Object[methodParameterTypes.length];
+
+        // Copy the normal (non-varargs) parameters
+        System.arraycopy(args, 0, newArgs, 0, methodParameterTypes.length - 1);
+
+        // Construct a new array for the variadic parameters
+        Class<?> varArgComponentType = methodParameterTypes[methodParameterTypes.length - 1].getComponentType();
+        int varArgLength = args.length - methodParameterTypes.length + 1;
+
+        Object varArgsArray = Array.newInstance(ClassUtils.primitiveToWrapper(varArgComponentType), varArgLength);
+        // Copy the variadic arguments into the varargs array.
+        System.arraycopy(args, methodParameterTypes.length - 1, varArgsArray, 0, varArgLength);
+
+        if(varArgComponentType.isPrimitive()) {
+            // unbox from wrapper type to primitive type
+            varArgsArray = ArrayUtils.toPrimitive(varArgsArray);
+        }
+
+        // Store the varargs array in the last position of the array to return
+        newArgs[methodParameterTypes.length - 1] = varArgsArray;
+
+        // Return the canonical varargs array.
+        return newArgs;
+    }
+
+    /**
+     * <p>Invokes a {@code static} method whose parameter types match exactly the object
+     * types.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactStaticMethod(final Class<?> cls, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeExactStaticMethod(cls, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) with given name and parameters. If no such method
+     * can be found, return {@code null}.
+     * This is just a convenience wrapper for
+     * {@link #getAccessibleMethod(Method)}.</p>
+     *
+     * @param cls get method from this class
+     * @param methodName get method with this name
+     * @param parameterTypes with these parameters types
+     * @return The accessible method
+     */
+    public static Method getAccessibleMethod(final Class<?> cls, final String methodName,
+            final Class<?>... parameterTypes) {
+        try {
+            return getAccessibleMethod(cls.getMethod(methodName,
+                    parameterTypes));
+        } catch (final NoSuchMethodException e) {
+            return null;
+        }
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) that implements the specified Method. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * @param method The method that we wish to call
+     * @return The accessible method
+     */
+    public static Method getAccessibleMethod(Method method) {
+        if (!MemberUtils.isAccessible(method)) {
+            return null;
+        }
+        // If the declaring class is public, we are done
+        final Class<?> cls = method.getDeclaringClass();
+        if (Modifier.isPublic(cls.getModifiers())) {
+            return method;
+        }
+        final String methodName = method.getName();
+        final Class<?>[] parameterTypes = method.getParameterTypes();
+
+        // Check the implemented interfaces and subinterfaces
+        method = getAccessibleMethodFromInterfaceNest(cls, methodName,
+                parameterTypes);
+
+        // Check the superclass chain
+        if (method == null) {
+            method = getAccessibleMethodFromSuperclass(cls, methodName,
+                    parameterTypes);
+        }
+        return method;
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) by scanning through the superclasses. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * @param cls Class to be checked
+     * @param methodName Method name of the method we wish to call
+     * @param parameterTypes The parameter type signatures
+     * @return the accessible method or {@code null} if not found
+     */
+    private static Method getAccessibleMethodFromSuperclass(final Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        Class<?> parentClass = cls.getSuperclass();
+        while (parentClass != null) {
+            if (Modifier.isPublic(parentClass.getModifiers())) {
+                try {
+                    return parentClass.getMethod(methodName, parameterTypes);
+                } catch (final NoSuchMethodException e) {
+                    return null;
+                }
+            }
+            parentClass = parentClass.getSuperclass();
+        }
+        return null;
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) that implements the specified method, by scanning through
+     * all implemented interfaces and subinterfaces. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * <p>There isn't any good reason why this method must be {@code private}.
+     * It is because there doesn't seem any reason why other classes should
+     * call this rather than the higher level methods.</p>
+     *
+     * @param cls Parent class for the interfaces to be checked
+     * @param methodName Method name of the method we wish to call
+     * @param parameterTypes The parameter type signatures
+     * @return the accessible method or {@code null} if not found
+     */
+    private static Method getAccessibleMethodFromInterfaceNest(Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        // Search up the superclass chain
+        for (; cls != null; cls = cls.getSuperclass()) {
+
+            // Check the implemented interfaces of the parent class
+            final Class<?>[] interfaces = cls.getInterfaces();
+            for (int i = 0; i < interfaces.length; i++) {
+                // Is this interface public?
+                if (!Modifier.isPublic(interfaces[i].getModifiers())) {
+                    continue;
+                }
+                // Does the method exist on this interface?
+                try {
+                    return interfaces[i].getDeclaredMethod(methodName,
+                            parameterTypes);
+                } catch (final NoSuchMethodException e) { // NOPMD
+                    /*
+                     * Swallow, if no method is found after the loop then this
+                     * method returns null.
+                     */
+                }
+                // Recursively check our parent interfaces
+                final Method method = getAccessibleMethodFromInterfaceNest(interfaces[i],
+                        methodName, parameterTypes);
+                if (method != null) {
+                    return method;
+                }
+            }
+        }
+        return null;
+    }
+
+    /**
+     * <p>Finds an accessible method that matches the given name and has compatible parameters.
+     * Compatible parameters mean that every method parameter is assignable from 
+     * the given parameters.
+     * In other words, it finds a method with the given name 
+     * that will take the parameters given.</p>
+     *
+     * <p>This method is used by 
+     * {@link 
+     * #invokeMethod(Object object, String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * <p>This method can match primitive parameter by passing in wrapper classes.
+     * For example, a {@code Boolean} will match a primitive {@code boolean}
+     * parameter.
+     * </p>
+     *
+     * @param cls find method in this class
+     * @param methodName find method with this name
+     * @param parameterTypes find method with most compatible parameters 
+     * @return The accessible method
+     */
+    public static Method getMatchingAccessibleMethod(final Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        try {
+            final Method method = cls.getMethod(methodName, parameterTypes);
+            MemberUtils.setAccessibleWorkaround(method);
+            return method;
+        } catch (final NoSuchMethodException e) { // NOPMD - Swallow the exception
+        }
+        // search through all methods
+        Method bestMatch = null;
+        final Method[] methods = cls.getMethods();
+        for (final Method method : methods) {
+            // compare name and parameters
+            if (method.getName().equals(methodName) &&
+                    MemberUtils.isMatchingMethod(method, parameterTypes)) {
+                // get accessible version of method
+                final Method accessibleMethod = getAccessibleMethod(method);
+                if (accessibleMethod != null && (bestMatch == null || MemberUtils.compareMethodFit(
+                            accessibleMethod,
+                            bestMatch,
+                            parameterTypes) < 0)) {
+                    bestMatch = accessibleMethod;
+                }
+            }
+        }
+        if (bestMatch != null) {
+            MemberUtils.setAccessibleWorkaround(bestMatch);
+        }
+        return bestMatch;
+    }
+    
+    /**
+     * <p>Retrieves a method whether or not it's accessible. If no such method
+     * can be found, return {@code null}.</p>
+     * @param cls The class that will be subjected to the method search
+     * @param methodName The method that we wish to call
+     * @param parameterTypes Argument class types
+     * @return The method
+     * 
+     * @since 3.5
+     */
+    public static Method getMatchingMethod(final Class<?> cls, final String methodName,
+            final Class<?>... parameterTypes) {
+        Validate.notNull(cls, "Null class not allowed.");
+        Validate.notEmpty(methodName, "Null or blank methodName not allowed.");
+
+        // Address methods in superclasses
+        Method[] methodArray = cls.getDeclaredMethods();
+        List<Class<?>> superclassList = ClassUtils.getAllSuperclasses(cls);
+        for (Class<?> klass : superclassList) {
+            methodArray = ArrayUtils.addAll(methodArray, klass.getDeclaredMethods());
+        }
+
+        Method inexactMatch = null;
+        for (Method method : methodArray) {
+            if (methodName.equals(method.getName()) &&
+                    ArrayUtils.isEquals(parameterTypes, method.getParameterTypes())) {
+                return method;
+            } else if (methodName.equals(method.getName()) &&
+                    ClassUtils.isAssignable(parameterTypes, method.getParameterTypes(), true)) {
+                if (inexactMatch == null) {
+                    inexactMatch = method;
+                } else if (distance(parameterTypes, method.getParameterTypes())
+                        < distance(parameterTypes, inexactMatch.getParameterTypes())) {
+                    inexactMatch = method;
+                }
+            }
+
+        }
+        return inexactMatch;
+    }
+    
+    /**
+     * <p>Returns the aggregate number of inheritance hops between assignable argument class types.  Returns -1
+     * if the arguments aren't assignable.  Fills a specific purpose for getMatchingMethod and is not generalized.</p>
+     * @param classArray
+     * @param toClassArray
+     * @return the aggregate number of inheritance hops between assignable argument class types.
+     */
+    private static int distance(Class<?>[] classArray, Class<?>[] toClassArray) {
+        int answer = 0;
+
+        if (!ClassUtils.isAssignable(classArray, toClassArray, true)) {
+            return -1;
+        }
+        for (int offset = 0; offset < classArray.length; offset++) {
+            // Note InheritanceUtils.distance() uses different scoring system.
+            if (classArray[offset].equals(toClassArray[offset])) {
+                continue;
+            } else if (ClassUtils.isAssignable(classArray[offset], toClassArray[offset], true)
+                    && !ClassUtils.isAssignable(classArray[offset], toClassArray[offset], false)) {
+                answer++;
+            } else {
+                answer = answer + 2;
+            }
+        }
+
+        return answer;
+    }
+
+    /**
+     * Get the hierarchy of overridden methods down to {@code result} respecting generics.
+     * @param method lowest to consider
+     * @param interfacesBehavior whether to search interfaces, {@code null} {@code implies} false
+     * @return Set&lt;Method&gt; in ascending order from sub- to superclass
+     * @throws NullPointerException if the specified method is {@code null}
+     * @since 3.2
+     */
+    public static Set<Method> getOverrideHierarchy(final Method method, final Interfaces interfacesBehavior) {
+        Validate.notNull(method);
+        final Set<Method> result = new LinkedHashSet<Method>();
+        result.add(method);
+
+        final Class<?>[] parameterTypes = method.getParameterTypes();
+
+        final Class<?> declaringClass = method.getDeclaringClass();
+
+        final Iterator<Class<?>> hierarchy = ClassUtils.hierarchy(declaringClass, interfacesBehavior).iterator();
+        //skip the declaring class :P
+        hierarchy.next();
+        hierarchyTraversal: while (hierarchy.hasNext()) {
+            final Class<?> c = hierarchy.next();
+            final Method m = getMatchingAccessibleMethod(c, method.getName(), parameterTypes);
+            if (m == null) {
+                continue;
+            }
+            if (Arrays.equals(m.getParameterTypes(), parameterTypes)) {
+                // matches without generics
+                result.add(m);
+                continue;
+            }
+            // necessary to get arguments every time in the case that we are including interfaces
+            final Map<TypeVariable<?>, Type> typeArguments = TypeUtils.getTypeArguments(declaringClass, m.getDeclaringClass());
+            for (int i = 0; i < parameterTypes.length; i++) {
+                final Type childType = TypeUtils.unrollVariables(typeArguments, method.getGenericParameterTypes()[i]);
+                final Type parentType = TypeUtils.unrollVariables(typeArguments, m.getGenericParameterTypes()[i]);
+                if (!TypeUtils.equals(childType, parentType)) {
+                    continue hierarchyTraversal;
+                }
+            }
+            result.add(m);
+        }
+        return result;
+    }
+
+    /**
+     * Gets all methods of the given class that are annotated with the given annotation.
+     * @param cls
+     *            the {@link Class} to query
+     * @param annotationCls
+     *            the {@link java.lang.annotation.Annotation} that must be present on a method to be matched
+     * @return an array of Methods (possibly empty).
+     * @throws IllegalArgumentException
+     *            if the class or annotation are {@code null}
+     * @since 3.4
+     */
+    public static Method[] getMethodsWithAnnotation(final Class<?> cls, final Class<? extends Annotation> annotationCls) {
+        final List<Method> annotatedMethodsList = getMethodsListWithAnnotation(cls, annotationCls);
+        return annotatedMethodsList.toArray(new Method[annotatedMethodsList.size()]);
+    }
+
+    /**
+     * Gets all methods of the given class that are annotated with the given annotation.
+     * @param cls
+     *            the {@link Class} to query
+     * @param annotationCls
+     *            the {@link Annotation} that must be present on a method to be matched
+     * @return a list of Methods (possibly empty).
+     * @throws IllegalArgumentException
+     *            if the class or annotation are {@code null}
+     * @since 3.4
+     */
+    public static List<Method> getMethodsListWithAnnotation(final Class<?> cls, final Class<? extends Annotation> annotationCls) {
+        Validate.isTrue(cls != null, "The class must not be null");
+        Validate.isTrue(annotationCls != null, "The annotation class must not be null");
+        final Method[] allMethods = cls.getMethods();
+        final List<Method> annotatedMethods = new ArrayList<Method>();
+        for (final Method method : allMethods) {
+            if (method.getAnnotation(annotationCls) != null) {
+                annotatedMethods.add(method);
+            }
+        }
+        return annotatedMethods;
+    }
+
+}
diff --git a/Java/commons-lang-MethodUtils_383/metadata.json b/Java/commons-lang-MethodUtils_383/metadata.json
new file mode 100644
index 000000000..514753ad1
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_383/metadata.json
@@ -0,0 +1,21 @@
+{
+  "language": "java",
+  "id": "commons-lang-MethodUtils_383",
+  "buggyPath": ".",
+  "referencePath": null,
+  "buildCommand": "mvn package -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100 -DskipTests=true -DskipITs=true -Dtest=None -DfailIfNoTests=false",
+  "testCommand": "mvn test -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100",
+  "categories": [
+    "safety",
+    "npe"
+  ],
+  "npe": {
+    "filepath": "src/main/java/org/apache/commons/lang3/reflect/MethodUtils.java",
+    "line": 407,
+    "npe_method": "invokeExactStaticMethod",
+    "deref_field": "method",
+    "npe_class": "MethodUtils",
+    "repo": "commons-lang",
+    "bug_id": "MethodUtils_383"
+  }
+}
diff --git a/Java/commons-lang-MethodUtils_383/npe.json b/Java/commons-lang-MethodUtils_383/npe.json
new file mode 100644
index 000000000..9a2ca8185
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_383/npe.json
@@ -0,0 +1,7 @@
+{
+    "filepath": "src/main/java/org/apache/commons/lang3/reflect/MethodUtils.java",
+    "line": 407,
+    "npe_method": "invokeExactStaticMethod",
+    "deref_field": "method",
+    "npe_class": "MethodUtils"
+}
\ No newline at end of file
diff --git a/Java/commons-lang-MethodUtils_452/Dockerfile b/Java/commons-lang-MethodUtils_452/Dockerfile
new file mode 100644
index 000000000..7b7fbe349
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_452/Dockerfile
@@ -0,0 +1,18 @@
+FROM ghcr.io/kupl/starlab-benchmarks/java-base:commons-lang
+
+ENV TZ=Asia/Seoul
+
+COPY ./metadata.json .
+COPY ./npe.json .
+COPY ./buggy.java /tmp/buggy.java
+RUN export BUGGY_PATH=$(cat metadata.json | jq -r ".npe.filepath") \
+    && export BUGGY_LINE=$(cat metadata.json | jq -r ".npe.line") \
+    && export BUGGY_MTHD=$(cat metadata.json | jq -r ".npe.npe_method") \
+    && mv /tmp/buggy.java $BUGGY_PATH \
+    && echo "[{\"filepath\": \"$BUGGY_PATH\", \"line\": $BUGGY_LINE, \"method_name\": \"$BUGGY_MTHD\"}]" | jq . > traces.json
+
+RUN git init . && git add -A
+
+RUN $(cat metadata.json | jq -r ".buildCommand")
+
+RUN $(cat metadata.json | jq -r ".testCommand"); if [ $? -eq 0 ]; then exit 1; fi
diff --git a/Java/commons-lang-MethodUtils_452/buggy.java b/Java/commons-lang-MethodUtils_452/buggy.java
new file mode 100644
index 000000000..ef1b5d05b
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_452/buggy.java
@@ -0,0 +1,894 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.lang3.reflect;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Array;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.lang.reflect.Type;
+import java.lang.reflect.TypeVariable;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.commons.lang3.ArrayUtils;
+import org.apache.commons.lang3.ClassUtils;
+import org.apache.commons.lang3.ClassUtils.Interfaces;
+import org.apache.commons.lang3.Validate;
+
+/**
+ * <p>Utility reflection methods focused on {@link Method}s, originally from Commons BeanUtils.
+ * Differences from the BeanUtils version may be noted, especially where similar functionality
+ * already existed within Lang.
+ * </p>
+ *
+ * <h3>Known Limitations</h3>
+ * <h4>Accessing Public Methods In A Default Access Superclass</h4>
+ * <p>There is an issue when invoking {@code public} methods contained in a default access superclass on JREs prior to 1.4.
+ * Reflection locates these methods fine and correctly assigns them as {@code public}.
+ * However, an {@link IllegalAccessException} is thrown if the method is invoked.</p>
+ *
+ * <p>{@link MethodUtils} contains a workaround for this situation. 
+ * It will attempt to call {@link java.lang.reflect.AccessibleObject#setAccessible(boolean)} on this method.
+ * If this call succeeds, then the method can be invoked as normal.
+ * This call will only succeed when the application has sufficient security privileges. 
+ * If this call fails then the method may fail.</p>
+ *
+ * @since 2.5
+ */
+public class MethodUtils {
+
+    /**
+     * <p>{@link MethodUtils} instances should NOT be constructed in standard programming.
+     * Instead, the class should be used as
+     * {@code MethodUtils.getAccessibleMethod(method)}.</p>
+     *
+     * <p>This constructor is {@code public} to permit tools that require a JavaBean
+     * instance to operate.</p>
+     */
+    public MethodUtils() {
+        super();
+    }
+
+    /**
+     * <p>Invokes a named method without parameters.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *  
+     *  @since 3.4
+     */
+    public static Object invokeMethod(final Object object, final String methodName) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        return invokeMethod(object, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+    
+    /**
+     * <p>Invokes a named method without parameters.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,boolean forceAccess,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName)
+            throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
+        return invokeMethod(object, forceAccess, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     */
+    public static Object invokeMethod(final Object object, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeMethod(object, methodName, args, parameterTypes);
+    }
+    
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,boolean forceAccess,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeMethod(object, forceAccess, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        args = ArrayUtils.nullToEmpty(args);
+
+        final String messagePrefix;
+        Method method = null;
+        boolean isOriginallyAccessible = false;
+        Object result = null;
+
+        try {
+            if (forceAccess) {
+                messagePrefix = "No such method: ";
+                method = getMatchingMethod(object.getClass(),
+                        methodName, parameterTypes);
+                if (method != null) {
+                    isOriginallyAccessible = method.isAccessible();
+                    if (!isOriginallyAccessible) {
+                        method.setAccessible(true);
+                    }
+                }
+            } else {
+                messagePrefix = "No such accessible method: ";
+                method = getMatchingAccessibleMethod(object.getClass(),
+                        methodName, parameterTypes);
+            }
+
+            if (method == null) {
+                throw new NoSuchMethodException(messagePrefix
+                        + methodName + "() on object: "
+                        + object.getClass().getName());
+            }
+            args = toVarArgs(method, args);
+
+            result = method.invoke(object, args);
+        }
+        finally {
+            if (method != null && forceAccess && method.isAccessible() != isOriginallyAccessible) {
+                method.setAccessible(isOriginallyAccessible);
+            }
+        }
+
+        return result;
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     */
+    public static Object invokeMethod(final Object object, final String methodName, 
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        return invokeMethod(object, false, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a method whose parameter types match exactly the object
+     * types.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod}(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     *
+     * @since 3.4
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        return invokeExactMethod(object, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+
+    /**
+     * <p>Invokes a method with no parameters.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod}(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeExactMethod(object, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a method whose parameter types match exactly the parameter
+     * types given.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        final Method method = getAccessibleMethod(object.getClass(), methodName,
+                parameterTypes);
+        if (method == null) {
+            throw new NoSuchMethodException("No such accessible method: "
+                    + methodName + "() on object: "
+                    + object.getClass().getName());
+        }
+        return method.invoke(object, args);
+    }
+
+    /**
+     * <p>Invokes a {@code static} method whose parameter types match exactly the parameter
+     * types given.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactStaticMethod(final Class<?> cls, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        final Method method = getAccessibleMethod(cls, methodName, parameterTypes);
+        if (method == null) {
+            throw new NoSuchMethodException("No such accessible method: "
+                    + methodName + "() on class: " + cls.getName());
+        }
+        return method.invoke(null, args);
+    }
+
+    /**
+     * <p>Invokes a named {@code static} method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} class
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeStaticMethod(Class, String, Object[], Class[])}.
+     * </p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeStaticMethod(final Class<?> cls, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeStaticMethod(cls, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a named {@code static} method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} class
+     * would match a {@code boolean} primitive.</p>
+     *
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+/**
+ * <p>Invokes a named {@code static} method whose parameter type matches the object type.</p>
+ *
+ * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+ *
+ * <p>This method supports calls to methods taking primitive parameters
+ * via passing in wrapping classes. So, for example, a {@code Boolean} class
+ * would match a {@code boolean} primitive.</p>
+ *
+ * @param cls
+ * 		invoke static method on this class
+ * @param methodName
+ * 		get method with this name
+ * @param args
+ * 		use these arguments - treat {@code null} as empty array
+ * @param parameterTypes
+ * 		match these parameters - treat {@code null} as empty array
+ * @return The value returned by the invoked method
+ * @throws NoSuchMethodException
+ * 		if there is no such accessible method
+ * @throws InvocationTargetException
+ * 		wraps an exception thrown by the
+ * 		method invoked
+ * @throws IllegalAccessException
+ * 		if the requested method is not accessible
+ * 		via reflection
+ */
+public static java.lang.Object invokeStaticMethod(final java.lang.Class<?> cls, final java.lang.String methodName, java.lang.Object[] args, java.lang.Class<?>[] parameterTypes) throws java.lang.NoSuchMethodException, java.lang.IllegalAccessException, java.lang.reflect.InvocationTargetException {
+    args = org.apache.commons.lang3.ArrayUtils.nullToEmpty(args);
+    parameterTypes = org.apache.commons.lang3.ArrayUtils.nullToEmpty(parameterTypes);
+    final java.lang.reflect.Method method = org.apache.commons.lang3.reflect.MethodUtils.getMatchingAccessibleMethod(cls, methodName, parameterTypes);
+    {
+        args = org.apache.commons.lang3.reflect.MethodUtils.toVarArgs(/* NPEX_NULL_EXP */
+        method, args);
+        return method.invoke(null, args);
+    }
+}
+
+    private static Object[] toVarArgs(Method method, Object[] args) {
+        if (method.isVarArgs()) {
+            Class<?>[] methodParameterTypes = method.getParameterTypes();
+            args = getVarArgs(args, methodParameterTypes);
+        }
+        return args;
+    }
+
+    /**
+     * <p>Given an arguments array passed to a varargs method, return an array of arguments in the canonical form,
+     * i.e. an array with the declared number of parameters, and whose last parameter is an array of the varargs type.
+     * </p>
+     *
+     * @param args the array of arguments passed to the varags method
+     * @param methodParameterTypes the declared array of method parameter types
+     * @return an array of the variadic arguments passed to the method
+     * @since 3.5
+     */
+    static Object[] getVarArgs(Object[] args, Class<?>[] methodParameterTypes) {
+        if (args.length == methodParameterTypes.length
+                && args[args.length - 1].getClass().equals(methodParameterTypes[methodParameterTypes.length - 1])) {
+            // The args array is already in the canonical form for the method.
+            return args;
+        }
+
+        // Construct a new array matching the method's declared parameter types.
+        Object[] newArgs = new Object[methodParameterTypes.length];
+
+        // Copy the normal (non-varargs) parameters
+        System.arraycopy(args, 0, newArgs, 0, methodParameterTypes.length - 1);
+
+        // Construct a new array for the variadic parameters
+        Class<?> varArgComponentType = methodParameterTypes[methodParameterTypes.length - 1].getComponentType();
+        int varArgLength = args.length - methodParameterTypes.length + 1;
+
+        Object varArgsArray = Array.newInstance(ClassUtils.primitiveToWrapper(varArgComponentType), varArgLength);
+        // Copy the variadic arguments into the varargs array.
+        System.arraycopy(args, methodParameterTypes.length - 1, varArgsArray, 0, varArgLength);
+
+        if(varArgComponentType.isPrimitive()) {
+            // unbox from wrapper type to primitive type
+            varArgsArray = ArrayUtils.toPrimitive(varArgsArray);
+        }
+
+        // Store the varargs array in the last position of the array to return
+        newArgs[methodParameterTypes.length - 1] = varArgsArray;
+
+        // Return the canonical varargs array.
+        return newArgs;
+    }
+
+    /**
+     * <p>Invokes a {@code static} method whose parameter types match exactly the object
+     * types.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactStaticMethod(final Class<?> cls, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeExactStaticMethod(cls, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) with given name and parameters. If no such method
+     * can be found, return {@code null}.
+     * This is just a convenience wrapper for
+     * {@link #getAccessibleMethod(Method)}.</p>
+     *
+     * @param cls get method from this class
+     * @param methodName get method with this name
+     * @param parameterTypes with these parameters types
+     * @return The accessible method
+     */
+    public static Method getAccessibleMethod(final Class<?> cls, final String methodName,
+            final Class<?>... parameterTypes) {
+        try {
+            return getAccessibleMethod(cls.getMethod(methodName,
+                    parameterTypes));
+        } catch (final NoSuchMethodException e) {
+            return null;
+        }
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) that implements the specified Method. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * @param method The method that we wish to call
+     * @return The accessible method
+     */
+    public static Method getAccessibleMethod(Method method) {
+        if (!MemberUtils.isAccessible(method)) {
+            return null;
+        }
+        // If the declaring class is public, we are done
+        final Class<?> cls = method.getDeclaringClass();
+        if (Modifier.isPublic(cls.getModifiers())) {
+            return method;
+        }
+        final String methodName = method.getName();
+        final Class<?>[] parameterTypes = method.getParameterTypes();
+
+        // Check the implemented interfaces and subinterfaces
+        method = getAccessibleMethodFromInterfaceNest(cls, methodName,
+                parameterTypes);
+
+        // Check the superclass chain
+        if (method == null) {
+            method = getAccessibleMethodFromSuperclass(cls, methodName,
+                    parameterTypes);
+        }
+        return method;
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) by scanning through the superclasses. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * @param cls Class to be checked
+     * @param methodName Method name of the method we wish to call
+     * @param parameterTypes The parameter type signatures
+     * @return the accessible method or {@code null} if not found
+     */
+    private static Method getAccessibleMethodFromSuperclass(final Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        Class<?> parentClass = cls.getSuperclass();
+        while (parentClass != null) {
+            if (Modifier.isPublic(parentClass.getModifiers())) {
+                try {
+                    return parentClass.getMethod(methodName, parameterTypes);
+                } catch (final NoSuchMethodException e) {
+                    return null;
+                }
+            }
+            parentClass = parentClass.getSuperclass();
+        }
+        return null;
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) that implements the specified method, by scanning through
+     * all implemented interfaces and subinterfaces. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * <p>There isn't any good reason why this method must be {@code private}.
+     * It is because there doesn't seem any reason why other classes should
+     * call this rather than the higher level methods.</p>
+     *
+     * @param cls Parent class for the interfaces to be checked
+     * @param methodName Method name of the method we wish to call
+     * @param parameterTypes The parameter type signatures
+     * @return the accessible method or {@code null} if not found
+     */
+    private static Method getAccessibleMethodFromInterfaceNest(Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        // Search up the superclass chain
+        for (; cls != null; cls = cls.getSuperclass()) {
+
+            // Check the implemented interfaces of the parent class
+            final Class<?>[] interfaces = cls.getInterfaces();
+            for (int i = 0; i < interfaces.length; i++) {
+                // Is this interface public?
+                if (!Modifier.isPublic(interfaces[i].getModifiers())) {
+                    continue;
+                }
+                // Does the method exist on this interface?
+                try {
+                    return interfaces[i].getDeclaredMethod(methodName,
+                            parameterTypes);
+                } catch (final NoSuchMethodException e) { // NOPMD
+                    /*
+                     * Swallow, if no method is found after the loop then this
+                     * method returns null.
+                     */
+                }
+                // Recursively check our parent interfaces
+                final Method method = getAccessibleMethodFromInterfaceNest(interfaces[i],
+                        methodName, parameterTypes);
+                if (method != null) {
+                    return method;
+                }
+            }
+        }
+        return null;
+    }
+
+    /**
+     * <p>Finds an accessible method that matches the given name and has compatible parameters.
+     * Compatible parameters mean that every method parameter is assignable from 
+     * the given parameters.
+     * In other words, it finds a method with the given name 
+     * that will take the parameters given.</p>
+     *
+     * <p>This method is used by 
+     * {@link 
+     * #invokeMethod(Object object, String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * <p>This method can match primitive parameter by passing in wrapper classes.
+     * For example, a {@code Boolean} will match a primitive {@code boolean}
+     * parameter.
+     * </p>
+     *
+     * @param cls find method in this class
+     * @param methodName find method with this name
+     * @param parameterTypes find method with most compatible parameters 
+     * @return The accessible method
+     */
+    public static Method getMatchingAccessibleMethod(final Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        try {
+            final Method method = cls.getMethod(methodName, parameterTypes);
+            MemberUtils.setAccessibleWorkaround(method);
+            return method;
+        } catch (final NoSuchMethodException e) { // NOPMD - Swallow the exception
+        }
+        // search through all methods
+        Method bestMatch = null;
+        final Method[] methods = cls.getMethods();
+        for (final Method method : methods) {
+            // compare name and parameters
+            if (method.getName().equals(methodName) &&
+                    MemberUtils.isMatchingMethod(method, parameterTypes)) {
+                // get accessible version of method
+                final Method accessibleMethod = getAccessibleMethod(method);
+                if (accessibleMethod != null && (bestMatch == null || MemberUtils.compareMethodFit(
+                            accessibleMethod,
+                            bestMatch,
+                            parameterTypes) < 0)) {
+                    bestMatch = accessibleMethod;
+                }
+            }
+        }
+        if (bestMatch != null) {
+            MemberUtils.setAccessibleWorkaround(bestMatch);
+        }
+        return bestMatch;
+    }
+    
+    /**
+     * <p>Retrieves a method whether or not it's accessible. If no such method
+     * can be found, return {@code null}.</p>
+     * @param cls The class that will be subjected to the method search
+     * @param methodName The method that we wish to call
+     * @param parameterTypes Argument class types
+     * @return The method
+     * 
+     * @since 3.5
+     */
+    public static Method getMatchingMethod(final Class<?> cls, final String methodName,
+            final Class<?>... parameterTypes) {
+        Validate.notNull(cls, "Null class not allowed.");
+        Validate.notEmpty(methodName, "Null or blank methodName not allowed.");
+
+        // Address methods in superclasses
+        Method[] methodArray = cls.getDeclaredMethods();
+        List<Class<?>> superclassList = ClassUtils.getAllSuperclasses(cls);
+        for (Class<?> klass : superclassList) {
+            methodArray = ArrayUtils.addAll(methodArray, klass.getDeclaredMethods());
+        }
+
+        Method inexactMatch = null;
+        for (Method method : methodArray) {
+            if (methodName.equals(method.getName()) &&
+                    ArrayUtils.isEquals(parameterTypes, method.getParameterTypes())) {
+                return method;
+            } else if (methodName.equals(method.getName()) &&
+                    ClassUtils.isAssignable(parameterTypes, method.getParameterTypes(), true)) {
+                if (inexactMatch == null) {
+                    inexactMatch = method;
+                } else if (distance(parameterTypes, method.getParameterTypes())
+                        < distance(parameterTypes, inexactMatch.getParameterTypes())) {
+                    inexactMatch = method;
+                }
+            }
+
+        }
+        return inexactMatch;
+    }
+    
+    /**
+     * <p>Returns the aggregate number of inheritance hops between assignable argument class types.  Returns -1
+     * if the arguments aren't assignable.  Fills a specific purpose for getMatchingMethod and is not generalized.</p>
+     * @param classArray
+     * @param toClassArray
+     * @return the aggregate number of inheritance hops between assignable argument class types.
+     */
+    private static int distance(Class<?>[] classArray, Class<?>[] toClassArray) {
+        int answer = 0;
+
+        if (!ClassUtils.isAssignable(classArray, toClassArray, true)) {
+            return -1;
+        }
+        for (int offset = 0; offset < classArray.length; offset++) {
+            // Note InheritanceUtils.distance() uses different scoring system.
+            if (classArray[offset].equals(toClassArray[offset])) {
+                continue;
+            } else if (ClassUtils.isAssignable(classArray[offset], toClassArray[offset], true)
+                    && !ClassUtils.isAssignable(classArray[offset], toClassArray[offset], false)) {
+                answer++;
+            } else {
+                answer = answer + 2;
+            }
+        }
+
+        return answer;
+    }
+
+    /**
+     * Get the hierarchy of overridden methods down to {@code result} respecting generics.
+     * @param method lowest to consider
+     * @param interfacesBehavior whether to search interfaces, {@code null} {@code implies} false
+     * @return Set&lt;Method&gt; in ascending order from sub- to superclass
+     * @throws NullPointerException if the specified method is {@code null}
+     * @since 3.2
+     */
+    public static Set<Method> getOverrideHierarchy(final Method method, final Interfaces interfacesBehavior) {
+        Validate.notNull(method);
+        final Set<Method> result = new LinkedHashSet<Method>();
+        result.add(method);
+
+        final Class<?>[] parameterTypes = method.getParameterTypes();
+
+        final Class<?> declaringClass = method.getDeclaringClass();
+
+        final Iterator<Class<?>> hierarchy = ClassUtils.hierarchy(declaringClass, interfacesBehavior).iterator();
+        //skip the declaring class :P
+        hierarchy.next();
+        hierarchyTraversal: while (hierarchy.hasNext()) {
+            final Class<?> c = hierarchy.next();
+            final Method m = getMatchingAccessibleMethod(c, method.getName(), parameterTypes);
+            if (m == null) {
+                continue;
+            }
+            if (Arrays.equals(m.getParameterTypes(), parameterTypes)) {
+                // matches without generics
+                result.add(m);
+                continue;
+            }
+            // necessary to get arguments every time in the case that we are including interfaces
+            final Map<TypeVariable<?>, Type> typeArguments = TypeUtils.getTypeArguments(declaringClass, m.getDeclaringClass());
+            for (int i = 0; i < parameterTypes.length; i++) {
+                final Type childType = TypeUtils.unrollVariables(typeArguments, method.getGenericParameterTypes()[i]);
+                final Type parentType = TypeUtils.unrollVariables(typeArguments, m.getGenericParameterTypes()[i]);
+                if (!TypeUtils.equals(childType, parentType)) {
+                    continue hierarchyTraversal;
+                }
+            }
+            result.add(m);
+        }
+        return result;
+    }
+
+    /**
+     * Gets all methods of the given class that are annotated with the given annotation.
+     * @param cls
+     *            the {@link Class} to query
+     * @param annotationCls
+     *            the {@link java.lang.annotation.Annotation} that must be present on a method to be matched
+     * @return an array of Methods (possibly empty).
+     * @throws IllegalArgumentException
+     *            if the class or annotation are {@code null}
+     * @since 3.4
+     */
+    public static Method[] getMethodsWithAnnotation(final Class<?> cls, final Class<? extends Annotation> annotationCls) {
+        final List<Method> annotatedMethodsList = getMethodsListWithAnnotation(cls, annotationCls);
+        return annotatedMethodsList.toArray(new Method[annotatedMethodsList.size()]);
+    }
+
+    /**
+     * Gets all methods of the given class that are annotated with the given annotation.
+     * @param cls
+     *            the {@link Class} to query
+     * @param annotationCls
+     *            the {@link Annotation} that must be present on a method to be matched
+     * @return a list of Methods (possibly empty).
+     * @throws IllegalArgumentException
+     *            if the class or annotation are {@code null}
+     * @since 3.4
+     */
+    public static List<Method> getMethodsListWithAnnotation(final Class<?> cls, final Class<? extends Annotation> annotationCls) {
+        Validate.isTrue(cls != null, "The class must not be null");
+        Validate.isTrue(annotationCls != null, "The annotation class must not be null");
+        final Method[] allMethods = cls.getMethods();
+        final List<Method> annotatedMethods = new ArrayList<Method>();
+        for (final Method method : allMethods) {
+            if (method.getAnnotation(annotationCls) != null) {
+                annotatedMethods.add(method);
+            }
+        }
+        return annotatedMethods;
+    }
+
+}
diff --git a/Java/commons-lang-MethodUtils_452/metadata.json b/Java/commons-lang-MethodUtils_452/metadata.json
new file mode 100644
index 000000000..1c92ab4d1
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_452/metadata.json
@@ -0,0 +1,21 @@
+{
+  "language": "java",
+  "id": "commons-lang-MethodUtils_452",
+  "buggyPath": ".",
+  "referencePath": null,
+  "buildCommand": "mvn package -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100 -DskipTests=true -DskipITs=true -Dtest=None -DfailIfNoTests=false",
+  "testCommand": "mvn test -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100",
+  "categories": [
+    "safety",
+    "npe"
+  ],
+  "npe": {
+    "filepath": "src/main/java/org/apache/commons/lang3/reflect/MethodUtils.java",
+    "line": 477,
+    "npe_method": "invokeStaticMethod",
+    "deref_field": "method",
+    "npe_class": "MethodUtils",
+    "repo": "commons-lang",
+    "bug_id": "MethodUtils_452"
+  }
+}
diff --git a/Java/commons-lang-MethodUtils_452/npe.json b/Java/commons-lang-MethodUtils_452/npe.json
new file mode 100644
index 000000000..5a4d17b59
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_452/npe.json
@@ -0,0 +1,7 @@
+{
+    "filepath": "src/main/java/org/apache/commons/lang3/reflect/MethodUtils.java",
+    "line": 477,
+    "npe_method": "invokeStaticMethod",
+    "deref_field": "method",
+    "npe_class": "MethodUtils"
+}
\ No newline at end of file
diff --git a/Java/commons-lang-MethodUtils_747/Dockerfile b/Java/commons-lang-MethodUtils_747/Dockerfile
new file mode 100644
index 000000000..7b7fbe349
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_747/Dockerfile
@@ -0,0 +1,18 @@
+FROM ghcr.io/kupl/starlab-benchmarks/java-base:commons-lang
+
+ENV TZ=Asia/Seoul
+
+COPY ./metadata.json .
+COPY ./npe.json .
+COPY ./buggy.java /tmp/buggy.java
+RUN export BUGGY_PATH=$(cat metadata.json | jq -r ".npe.filepath") \
+    && export BUGGY_LINE=$(cat metadata.json | jq -r ".npe.line") \
+    && export BUGGY_MTHD=$(cat metadata.json | jq -r ".npe.npe_method") \
+    && mv /tmp/buggy.java $BUGGY_PATH \
+    && echo "[{\"filepath\": \"$BUGGY_PATH\", \"line\": $BUGGY_LINE, \"method_name\": \"$BUGGY_MTHD\"}]" | jq . > traces.json
+
+RUN git init . && git add -A
+
+RUN $(cat metadata.json | jq -r ".buildCommand")
+
+RUN $(cat metadata.json | jq -r ".testCommand"); if [ $? -eq 0 ]; then exit 1; fi
diff --git a/Java/commons-lang-MethodUtils_747/buggy.java b/Java/commons-lang-MethodUtils_747/buggy.java
new file mode 100644
index 000000000..a46b8890a
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_747/buggy.java
@@ -0,0 +1,879 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.lang3.reflect;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Array;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.lang.reflect.Type;
+import java.lang.reflect.TypeVariable;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.commons.lang3.ArrayUtils;
+import org.apache.commons.lang3.ClassUtils;
+import org.apache.commons.lang3.ClassUtils.Interfaces;
+import org.apache.commons.lang3.Validate;
+
+/**
+ * <p>Utility reflection methods focused on {@link Method}s, originally from Commons BeanUtils.
+ * Differences from the BeanUtils version may be noted, especially where similar functionality
+ * already existed within Lang.
+ * </p>
+ *
+ * <h3>Known Limitations</h3>
+ * <h4>Accessing Public Methods In A Default Access Superclass</h4>
+ * <p>There is an issue when invoking {@code public} methods contained in a default access superclass on JREs prior to 1.4.
+ * Reflection locates these methods fine and correctly assigns them as {@code public}.
+ * However, an {@link IllegalAccessException} is thrown if the method is invoked.</p>
+ *
+ * <p>{@link MethodUtils} contains a workaround for this situation. 
+ * It will attempt to call {@link java.lang.reflect.AccessibleObject#setAccessible(boolean)} on this method.
+ * If this call succeeds, then the method can be invoked as normal.
+ * This call will only succeed when the application has sufficient security privileges. 
+ * If this call fails then the method may fail.</p>
+ *
+ * @since 2.5
+ */
+public class MethodUtils {
+
+    /**
+     * <p>{@link MethodUtils} instances should NOT be constructed in standard programming.
+     * Instead, the class should be used as
+     * {@code MethodUtils.getAccessibleMethod(method)}.</p>
+     *
+     * <p>This constructor is {@code public} to permit tools that require a JavaBean
+     * instance to operate.</p>
+     */
+    public MethodUtils() {
+        super();
+    }
+
+    /**
+     * <p>Invokes a named method without parameters.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *  
+     *  @since 3.4
+     */
+    public static Object invokeMethod(final Object object, final String methodName) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        return invokeMethod(object, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+    
+    /**
+     * <p>Invokes a named method without parameters.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,boolean forceAccess,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName)
+            throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
+        return invokeMethod(object, forceAccess, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     */
+    public static Object invokeMethod(final Object object, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeMethod(object, methodName, args, parameterTypes);
+    }
+    
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,boolean forceAccess,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeMethod(object, forceAccess, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        args = ArrayUtils.nullToEmpty(args);
+
+        final String messagePrefix;
+        Method method = null;
+        boolean isOriginallyAccessible = false;
+        Object result = null;
+
+        try {
+            if (forceAccess) {
+                messagePrefix = "No such method: ";
+                method = getMatchingMethod(object.getClass(),
+                        methodName, parameterTypes);
+                if (method != null) {
+                    isOriginallyAccessible = method.isAccessible();
+                    if (!isOriginallyAccessible) {
+                        method.setAccessible(true);
+                    }
+                }
+            } else {
+                messagePrefix = "No such accessible method: ";
+                method = getMatchingAccessibleMethod(object.getClass(),
+                        methodName, parameterTypes);
+            }
+
+            if (method == null) {
+                throw new NoSuchMethodException(messagePrefix
+                        + methodName + "() on object: "
+                        + object.getClass().getName());
+            }
+            args = toVarArgs(method, args);
+
+            result = method.invoke(object, args);
+        }
+        finally {
+            if (method != null && forceAccess && method.isAccessible() != isOriginallyAccessible) {
+                method.setAccessible(isOriginallyAccessible);
+            }
+        }
+
+        return result;
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     */
+    public static Object invokeMethod(final Object object, final String methodName, 
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        return invokeMethod(object, false, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a method whose parameter types match exactly the object
+     * types.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod}(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     *
+     * @since 3.4
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        return invokeExactMethod(object, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+
+    /**
+     * <p>Invokes a method with no parameters.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod}(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeExactMethod(object, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a method whose parameter types match exactly the parameter
+     * types given.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        final Method method = getAccessibleMethod(object.getClass(), methodName,
+                parameterTypes);
+        if (method == null) {
+            throw new NoSuchMethodException("No such accessible method: "
+                    + methodName + "() on object: "
+                    + object.getClass().getName());
+        }
+        return method.invoke(object, args);
+    }
+
+    /**
+     * <p>Invokes a {@code static} method whose parameter types match exactly the parameter
+     * types given.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactStaticMethod(final Class<?> cls, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        final Method method = getAccessibleMethod(cls, methodName, parameterTypes);
+        if (method == null) {
+            throw new NoSuchMethodException("No such accessible method: "
+                    + methodName + "() on class: " + cls.getName());
+        }
+        return method.invoke(null, args);
+    }
+
+    /**
+     * <p>Invokes a named {@code static} method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} class
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeStaticMethod(Class, String, Object[], Class[])}.
+     * </p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeStaticMethod(final Class<?> cls, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeStaticMethod(cls, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a named {@code static} method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} class
+     * would match a {@code boolean} primitive.</p>
+     *
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeStaticMethod(final Class<?> cls, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        final Method method = getMatchingAccessibleMethod(cls, methodName,
+                parameterTypes);
+        if (method == null) {
+            throw new NoSuchMethodException("No such accessible method: "
+                    + methodName + "() on class: " + cls.getName());
+        }
+        args = toVarArgs(method, args);
+        return method.invoke(null, args);
+    }
+
+    private static Object[] toVarArgs(Method method, Object[] args) {
+        if (method.isVarArgs()) {
+            Class<?>[] methodParameterTypes = method.getParameterTypes();
+            args = getVarArgs(args, methodParameterTypes);
+        }
+        return args;
+    }
+
+    /**
+     * <p>Given an arguments array passed to a varargs method, return an array of arguments in the canonical form,
+     * i.e. an array with the declared number of parameters, and whose last parameter is an array of the varargs type.
+     * </p>
+     *
+     * @param args the array of arguments passed to the varags method
+     * @param methodParameterTypes the declared array of method parameter types
+     * @return an array of the variadic arguments passed to the method
+     * @since 3.5
+     */
+    static Object[] getVarArgs(Object[] args, Class<?>[] methodParameterTypes) {
+        if (args.length == methodParameterTypes.length
+                && args[args.length - 1].getClass().equals(methodParameterTypes[methodParameterTypes.length - 1])) {
+            // The args array is already in the canonical form for the method.
+            return args;
+        }
+
+        // Construct a new array matching the method's declared parameter types.
+        Object[] newArgs = new Object[methodParameterTypes.length];
+
+        // Copy the normal (non-varargs) parameters
+        System.arraycopy(args, 0, newArgs, 0, methodParameterTypes.length - 1);
+
+        // Construct a new array for the variadic parameters
+        Class<?> varArgComponentType = methodParameterTypes[methodParameterTypes.length - 1].getComponentType();
+        int varArgLength = args.length - methodParameterTypes.length + 1;
+
+        Object varArgsArray = Array.newInstance(ClassUtils.primitiveToWrapper(varArgComponentType), varArgLength);
+        // Copy the variadic arguments into the varargs array.
+        System.arraycopy(args, methodParameterTypes.length - 1, varArgsArray, 0, varArgLength);
+
+        if(varArgComponentType.isPrimitive()) {
+            // unbox from wrapper type to primitive type
+            varArgsArray = ArrayUtils.toPrimitive(varArgsArray);
+        }
+
+        // Store the varargs array in the last position of the array to return
+        newArgs[methodParameterTypes.length - 1] = varArgsArray;
+
+        // Return the canonical varargs array.
+        return newArgs;
+    }
+
+    /**
+     * <p>Invokes a {@code static} method whose parameter types match exactly the object
+     * types.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactStaticMethod(final Class<?> cls, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeExactStaticMethod(cls, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) with given name and parameters. If no such method
+     * can be found, return {@code null}.
+     * This is just a convenience wrapper for
+     * {@link #getAccessibleMethod(Method)}.</p>
+     *
+     * @param cls get method from this class
+     * @param methodName get method with this name
+     * @param parameterTypes with these parameters types
+     * @return The accessible method
+     */
+    public static Method getAccessibleMethod(final Class<?> cls, final String methodName,
+            final Class<?>... parameterTypes) {
+        try {
+            return getAccessibleMethod(cls.getMethod(methodName,
+                    parameterTypes));
+        } catch (final NoSuchMethodException e) {
+            return null;
+        }
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) that implements the specified Method. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * @param method The method that we wish to call
+     * @return The accessible method
+     */
+    public static Method getAccessibleMethod(Method method) {
+        if (!MemberUtils.isAccessible(method)) {
+            return null;
+        }
+        // If the declaring class is public, we are done
+        final Class<?> cls = method.getDeclaringClass();
+        if (Modifier.isPublic(cls.getModifiers())) {
+            return method;
+        }
+        final String methodName = method.getName();
+        final Class<?>[] parameterTypes = method.getParameterTypes();
+
+        // Check the implemented interfaces and subinterfaces
+        method = getAccessibleMethodFromInterfaceNest(cls, methodName,
+                parameterTypes);
+
+        // Check the superclass chain
+        if (method == null) {
+            method = getAccessibleMethodFromSuperclass(cls, methodName,
+                    parameterTypes);
+        }
+        return method;
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) by scanning through the superclasses. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * @param cls Class to be checked
+     * @param methodName Method name of the method we wish to call
+     * @param parameterTypes The parameter type signatures
+     * @return the accessible method or {@code null} if not found
+     */
+    private static Method getAccessibleMethodFromSuperclass(final Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        Class<?> parentClass = cls.getSuperclass();
+        while (parentClass != null) {
+            if (Modifier.isPublic(parentClass.getModifiers())) {
+                try {
+                    return parentClass.getMethod(methodName, parameterTypes);
+                } catch (final NoSuchMethodException e) {
+                    return null;
+                }
+            }
+            parentClass = parentClass.getSuperclass();
+        }
+        return null;
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) that implements the specified method, by scanning through
+     * all implemented interfaces and subinterfaces. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * <p>There isn't any good reason why this method must be {@code private}.
+     * It is because there doesn't seem any reason why other classes should
+     * call this rather than the higher level methods.</p>
+     *
+     * @param cls Parent class for the interfaces to be checked
+     * @param methodName Method name of the method we wish to call
+     * @param parameterTypes The parameter type signatures
+     * @return the accessible method or {@code null} if not found
+     */
+    private static Method getAccessibleMethodFromInterfaceNest(Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        // Search up the superclass chain
+        for (; cls != null; cls = cls.getSuperclass()) {
+
+            // Check the implemented interfaces of the parent class
+            final Class<?>[] interfaces = cls.getInterfaces();
+            for (int i = 0; i < interfaces.length; i++) {
+                // Is this interface public?
+                if (!Modifier.isPublic(interfaces[i].getModifiers())) {
+                    continue;
+                }
+                // Does the method exist on this interface?
+                try {
+                    return interfaces[i].getDeclaredMethod(methodName,
+                            parameterTypes);
+                } catch (final NoSuchMethodException e) { // NOPMD
+                    /*
+                     * Swallow, if no method is found after the loop then this
+                     * method returns null.
+                     */
+                }
+                // Recursively check our parent interfaces
+                final Method method = getAccessibleMethodFromInterfaceNest(interfaces[i],
+                        methodName, parameterTypes);
+                if (method != null) {
+                    return method;
+                }
+            }
+        }
+        return null;
+    }
+
+    /**
+     * <p>Finds an accessible method that matches the given name and has compatible parameters.
+     * Compatible parameters mean that every method parameter is assignable from 
+     * the given parameters.
+     * In other words, it finds a method with the given name 
+     * that will take the parameters given.</p>
+     *
+     * <p>This method is used by 
+     * {@link 
+     * #invokeMethod(Object object, String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * <p>This method can match primitive parameter by passing in wrapper classes.
+     * For example, a {@code Boolean} will match a primitive {@code boolean}
+     * parameter.
+     * </p>
+     *
+     * @param cls find method in this class
+     * @param methodName find method with this name
+     * @param parameterTypes find method with most compatible parameters 
+     * @return The accessible method
+     */
+    public static Method getMatchingAccessibleMethod(final Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        try {
+            final Method method = cls.getMethod(methodName, parameterTypes);
+            MemberUtils.setAccessibleWorkaround(method);
+            return method;
+        } catch (final NoSuchMethodException e) { // NOPMD - Swallow the exception
+        }
+        // search through all methods
+        Method bestMatch = null;
+        final Method[] methods = cls.getMethods();
+        for (final Method method : methods) {
+            // compare name and parameters
+            if (method.getName().equals(methodName) &&
+                    MemberUtils.isMatchingMethod(method, parameterTypes)) {
+                // get accessible version of method
+                final Method accessibleMethod = getAccessibleMethod(method);
+                if (accessibleMethod != null && (bestMatch == null || MemberUtils.compareMethodFit(
+                            accessibleMethod,
+                            bestMatch,
+                            parameterTypes) < 0)) {
+                    bestMatch = accessibleMethod;
+                }
+            }
+        }
+        if (bestMatch != null) {
+            MemberUtils.setAccessibleWorkaround(bestMatch);
+        }
+        return bestMatch;
+    }
+    
+    /**
+     * <p>Retrieves a method whether or not it's accessible. If no such method
+     * can be found, return {@code null}.</p>
+     * @param cls The class that will be subjected to the method search
+     * @param methodName The method that we wish to call
+     * @param parameterTypes Argument class types
+     * @return The method
+     * 
+     * @since 3.5
+     */
+/**
+ * <p>Retrieves a method whether or not it's accessible. If no such method
+ * can be found, return {@code null}.</p>
+ *
+ * @param cls
+ * 		The class that will be subjected to the method search
+ * @param methodName
+ * 		The method that we wish to call
+ * @param parameterTypes
+ * 		Argument class types
+ * @return The method
+ * @since 3.5
+ */
+public static java.lang.reflect.Method getMatchingMethod(final java.lang.Class<?> cls, final java.lang.String methodName, final java.lang.Class<?>... parameterTypes) {
+    org.apache.commons.lang3.Validate.notNull(cls, "Null class not allowed.");
+    org.apache.commons.lang3.Validate.notEmpty(methodName, "Null or blank methodName not allowed.");
+    // Address methods in superclasses
+    java.lang.reflect.Method[] methodArray = cls.getDeclaredMethods();
+    java.util.List<java.lang.Class<?>> superclassList = org.apache.commons.lang3.ClassUtils.getAllSuperclasses(cls);
+    for (java.lang.Class<?> klass : superclassList) {
+        methodArray = org.apache.commons.lang3.ArrayUtils.addAll(methodArray, klass.getDeclaredMethods());
+    }
+    java.lang.reflect.Method inexactMatch = null;
+    for (java.lang.reflect.Method method : methodArray) {
+        if (methodName.equals(method.getName()) && org.apache.commons.lang3.ArrayUtils.isEquals(parameterTypes, method.getParameterTypes())) {
+            return method;
+        } else if (methodName.equals(method.getName()) && org.apache.commons.lang3.ClassUtils.isAssignable(parameterTypes, method.getParameterTypes(), true)) {
+            {
+                if (org.apache.commons.lang3.reflect.MethodUtils.distance(parameterTypes, method.getParameterTypes()) < org.apache.commons.lang3.reflect.MethodUtils.distance(parameterTypes, /* NPEX_NULL_EXP */
+                inexactMatch.getParameterTypes())) {
+                    inexactMatch = method;
+                }
+            }
+        }
+    }
+    return inexactMatch;
+}
+    
+    /**
+     * <p>Returns the aggregate number of inheritance hops between assignable argument class types.  Returns -1
+     * if the arguments aren't assignable.  Fills a specific purpose for getMatchingMethod and is not generalized.</p>
+     * @param classArray
+     * @param toClassArray
+     * @return the aggregate number of inheritance hops between assignable argument class types.
+     */
+    private static int distance(Class<?>[] classArray, Class<?>[] toClassArray) {
+        int answer = 0;
+
+        if (!ClassUtils.isAssignable(classArray, toClassArray, true)) {
+            return -1;
+        }
+        for (int offset = 0; offset < classArray.length; offset++) {
+            // Note InheritanceUtils.distance() uses different scoring system.
+            if (classArray[offset].equals(toClassArray[offset])) {
+                continue;
+            } else if (ClassUtils.isAssignable(classArray[offset], toClassArray[offset], true)
+                    && !ClassUtils.isAssignable(classArray[offset], toClassArray[offset], false)) {
+                answer++;
+            } else {
+                answer = answer + 2;
+            }
+        }
+
+        return answer;
+    }
+
+    /**
+     * Get the hierarchy of overridden methods down to {@code result} respecting generics.
+     * @param method lowest to consider
+     * @param interfacesBehavior whether to search interfaces, {@code null} {@code implies} false
+     * @return Set&lt;Method&gt; in ascending order from sub- to superclass
+     * @throws NullPointerException if the specified method is {@code null}
+     * @since 3.2
+     */
+    public static Set<Method> getOverrideHierarchy(final Method method, final Interfaces interfacesBehavior) {
+        Validate.notNull(method);
+        final Set<Method> result = new LinkedHashSet<Method>();
+        result.add(method);
+
+        final Class<?>[] parameterTypes = method.getParameterTypes();
+
+        final Class<?> declaringClass = method.getDeclaringClass();
+
+        final Iterator<Class<?>> hierarchy = ClassUtils.hierarchy(declaringClass, interfacesBehavior).iterator();
+        //skip the declaring class :P
+        hierarchy.next();
+        hierarchyTraversal: while (hierarchy.hasNext()) {
+            final Class<?> c = hierarchy.next();
+            final Method m = getMatchingAccessibleMethod(c, method.getName(), parameterTypes);
+            if (m == null) {
+                continue;
+            }
+            if (Arrays.equals(m.getParameterTypes(), parameterTypes)) {
+                // matches without generics
+                result.add(m);
+                continue;
+            }
+            // necessary to get arguments every time in the case that we are including interfaces
+            final Map<TypeVariable<?>, Type> typeArguments = TypeUtils.getTypeArguments(declaringClass, m.getDeclaringClass());
+            for (int i = 0; i < parameterTypes.length; i++) {
+                final Type childType = TypeUtils.unrollVariables(typeArguments, method.getGenericParameterTypes()[i]);
+                final Type parentType = TypeUtils.unrollVariables(typeArguments, m.getGenericParameterTypes()[i]);
+                if (!TypeUtils.equals(childType, parentType)) {
+                    continue hierarchyTraversal;
+                }
+            }
+            result.add(m);
+        }
+        return result;
+    }
+
+    /**
+     * Gets all methods of the given class that are annotated with the given annotation.
+     * @param cls
+     *            the {@link Class} to query
+     * @param annotationCls
+     *            the {@link java.lang.annotation.Annotation} that must be present on a method to be matched
+     * @return an array of Methods (possibly empty).
+     * @throws IllegalArgumentException
+     *            if the class or annotation are {@code null}
+     * @since 3.4
+     */
+    public static Method[] getMethodsWithAnnotation(final Class<?> cls, final Class<? extends Annotation> annotationCls) {
+        final List<Method> annotatedMethodsList = getMethodsListWithAnnotation(cls, annotationCls);
+        return annotatedMethodsList.toArray(new Method[annotatedMethodsList.size()]);
+    }
+
+    /**
+     * Gets all methods of the given class that are annotated with the given annotation.
+     * @param cls
+     *            the {@link Class} to query
+     * @param annotationCls
+     *            the {@link Annotation} that must be present on a method to be matched
+     * @return a list of Methods (possibly empty).
+     * @throws IllegalArgumentException
+     *            if the class or annotation are {@code null}
+     * @since 3.4
+     */
+    public static List<Method> getMethodsListWithAnnotation(final Class<?> cls, final Class<? extends Annotation> annotationCls) {
+        Validate.isTrue(cls != null, "The class must not be null");
+        Validate.isTrue(annotationCls != null, "The annotation class must not be null");
+        final Method[] allMethods = cls.getMethods();
+        final List<Method> annotatedMethods = new ArrayList<Method>();
+        for (final Method method : allMethods) {
+            if (method.getAnnotation(annotationCls) != null) {
+                annotatedMethods.add(method);
+            }
+        }
+        return annotatedMethods;
+    }
+
+}
diff --git a/Java/commons-lang-MethodUtils_747/metadata.json b/Java/commons-lang-MethodUtils_747/metadata.json
new file mode 100644
index 000000000..0763eb617
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_747/metadata.json
@@ -0,0 +1,21 @@
+{
+  "language": "java",
+  "id": "commons-lang-MethodUtils_747",
+  "buggyPath": ".",
+  "referencePath": null,
+  "buildCommand": "mvn package -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100 -DskipTests=true -DskipITs=true -Dtest=None -DfailIfNoTests=false",
+  "testCommand": "mvn test -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100",
+  "categories": [
+    "safety",
+    "npe"
+  ],
+  "npe": {
+    "filepath": "src/main/java/org/apache/commons/lang3/reflect/MethodUtils.java",
+    "line": 757,
+    "npe_method": "getMatchingMethod",
+    "deref_field": "inexactMatch",
+    "npe_class": "MethodUtils",
+    "repo": "commons-lang",
+    "bug_id": "MethodUtils_747"
+  }
+}
diff --git a/Java/commons-lang-MethodUtils_747/npe.json b/Java/commons-lang-MethodUtils_747/npe.json
new file mode 100644
index 000000000..7646c6d3e
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_747/npe.json
@@ -0,0 +1,7 @@
+{
+    "filepath": "src/main/java/org/apache/commons/lang3/reflect/MethodUtils.java",
+    "line": 757,
+    "npe_method": "getMatchingMethod",
+    "deref_field": "inexactMatch",
+    "npe_class": "MethodUtils"
+}
\ No newline at end of file
diff --git a/Java/commons-lang-MethodUtils_810/Dockerfile b/Java/commons-lang-MethodUtils_810/Dockerfile
new file mode 100644
index 000000000..7b7fbe349
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_810/Dockerfile
@@ -0,0 +1,18 @@
+FROM ghcr.io/kupl/starlab-benchmarks/java-base:commons-lang
+
+ENV TZ=Asia/Seoul
+
+COPY ./metadata.json .
+COPY ./npe.json .
+COPY ./buggy.java /tmp/buggy.java
+RUN export BUGGY_PATH=$(cat metadata.json | jq -r ".npe.filepath") \
+    && export BUGGY_LINE=$(cat metadata.json | jq -r ".npe.line") \
+    && export BUGGY_MTHD=$(cat metadata.json | jq -r ".npe.npe_method") \
+    && mv /tmp/buggy.java $BUGGY_PATH \
+    && echo "[{\"filepath\": \"$BUGGY_PATH\", \"line\": $BUGGY_LINE, \"method_name\": \"$BUGGY_MTHD\"}]" | jq . > traces.json
+
+RUN git init . && git add -A
+
+RUN $(cat metadata.json | jq -r ".buildCommand")
+
+RUN $(cat metadata.json | jq -r ".testCommand"); if [ $? -eq 0 ]; then exit 1; fi
diff --git a/Java/commons-lang-MethodUtils_810/buggy.java b/Java/commons-lang-MethodUtils_810/buggy.java
new file mode 100644
index 000000000..9e34a388f
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_810/buggy.java
@@ -0,0 +1,881 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.lang3.reflect;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Array;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.lang.reflect.Type;
+import java.lang.reflect.TypeVariable;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.commons.lang3.ArrayUtils;
+import org.apache.commons.lang3.ClassUtils;
+import org.apache.commons.lang3.ClassUtils.Interfaces;
+import org.apache.commons.lang3.Validate;
+
+/**
+ * <p>Utility reflection methods focused on {@link Method}s, originally from Commons BeanUtils.
+ * Differences from the BeanUtils version may be noted, especially where similar functionality
+ * already existed within Lang.
+ * </p>
+ *
+ * <h3>Known Limitations</h3>
+ * <h4>Accessing Public Methods In A Default Access Superclass</h4>
+ * <p>There is an issue when invoking {@code public} methods contained in a default access superclass on JREs prior to 1.4.
+ * Reflection locates these methods fine and correctly assigns them as {@code public}.
+ * However, an {@link IllegalAccessException} is thrown if the method is invoked.</p>
+ *
+ * <p>{@link MethodUtils} contains a workaround for this situation. 
+ * It will attempt to call {@link java.lang.reflect.AccessibleObject#setAccessible(boolean)} on this method.
+ * If this call succeeds, then the method can be invoked as normal.
+ * This call will only succeed when the application has sufficient security privileges. 
+ * If this call fails then the method may fail.</p>
+ *
+ * @since 2.5
+ */
+public class MethodUtils {
+
+    /**
+     * <p>{@link MethodUtils} instances should NOT be constructed in standard programming.
+     * Instead, the class should be used as
+     * {@code MethodUtils.getAccessibleMethod(method)}.</p>
+     *
+     * <p>This constructor is {@code public} to permit tools that require a JavaBean
+     * instance to operate.</p>
+     */
+    public MethodUtils() {
+        super();
+    }
+
+    /**
+     * <p>Invokes a named method without parameters.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *  
+     *  @since 3.4
+     */
+    public static Object invokeMethod(final Object object, final String methodName) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        return invokeMethod(object, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+    
+    /**
+     * <p>Invokes a named method without parameters.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,boolean forceAccess,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName)
+            throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
+        return invokeMethod(object, forceAccess, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     */
+    public static Object invokeMethod(final Object object, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeMethod(object, methodName, args, parameterTypes);
+    }
+    
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeMethod(Object object,boolean forceAccess,String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     *
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeMethod(object, forceAccess, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * @param object invoke method on this object
+     * @param forceAccess force access to invoke method even if it's not accessible
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     * @since 3.5
+     */
+    public static Object invokeMethod(final Object object, final boolean forceAccess, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        args = ArrayUtils.nullToEmpty(args);
+
+        final String messagePrefix;
+        Method method = null;
+        boolean isOriginallyAccessible = false;
+        Object result = null;
+
+        try {
+            if (forceAccess) {
+                messagePrefix = "No such method: ";
+                method = getMatchingMethod(object.getClass(),
+                        methodName, parameterTypes);
+                if (method != null) {
+                    isOriginallyAccessible = method.isAccessible();
+                    if (!isOriginallyAccessible) {
+                        method.setAccessible(true);
+                    }
+                }
+            } else {
+                messagePrefix = "No such accessible method: ";
+                method = getMatchingAccessibleMethod(object.getClass(),
+                        methodName, parameterTypes);
+            }
+
+            if (method == null) {
+                throw new NoSuchMethodException(messagePrefix
+                        + methodName + "() on object: "
+                        + object.getClass().getName());
+            }
+            args = toVarArgs(method, args);
+
+            result = method.invoke(object, args);
+        }
+        finally {
+            if (method != null && forceAccess && method.isAccessible() != isOriginallyAccessible) {
+                method.setAccessible(isOriginallyAccessible);
+            }
+        }
+
+        return result;
+    }
+
+    /**
+     * <p>Invokes a named method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} object
+     * would match a {@code boolean} primitive.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the method invoked
+     * @throws IllegalAccessException if the requested method is not accessible via reflection
+     */
+    public static Object invokeMethod(final Object object, final String methodName, 
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        return invokeMethod(object, false, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a method whose parameter types match exactly the object
+     * types.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod}(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     *
+     * @since 3.4
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        return invokeExactMethod(object, methodName, ArrayUtils.EMPTY_OBJECT_ARRAY, null);
+    }
+
+    /**
+     * <p>Invokes a method with no parameters.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod}(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeExactMethod(object, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a method whose parameter types match exactly the parameter
+     * types given.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class,String,Class[])}.</p>
+     *
+     * @param object invoke method on this object
+     * @param methodName get method with this name
+     * @param args use these arguments - treat null as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactMethod(final Object object, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        final Method method = getAccessibleMethod(object.getClass(), methodName,
+                parameterTypes);
+        if (method == null) {
+            throw new NoSuchMethodException("No such accessible method: "
+                    + methodName + "() on object: "
+                    + object.getClass().getName());
+        }
+        return method.invoke(object, args);
+    }
+
+    /**
+     * <p>Invokes a {@code static} method whose parameter types match exactly the parameter
+     * types given.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactStaticMethod(final Class<?> cls, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        final Method method = getAccessibleMethod(cls, methodName, parameterTypes);
+        if (method == null) {
+            throw new NoSuchMethodException("No such accessible method: "
+                    + methodName + "() on class: " + cls.getName());
+        }
+        return method.invoke(null, args);
+    }
+
+    /**
+     * <p>Invokes a named {@code static} method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} class
+     * would match a {@code boolean} primitive.</p>
+     *
+     * <p>This is a convenient wrapper for
+     * {@link #invokeStaticMethod(Class, String, Object[], Class[])}.
+     * </p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeStaticMethod(final Class<?> cls, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeStaticMethod(cls, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Invokes a named {@code static} method whose parameter type matches the object type.</p>
+     *
+     * <p>This method delegates the method search to {@link #getMatchingAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * <p>This method supports calls to methods taking primitive parameters 
+     * via passing in wrapping classes. So, for example, a {@code Boolean} class
+     * would match a {@code boolean} primitive.</p>
+     *
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @param parameterTypes match these parameters - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeStaticMethod(final Class<?> cls, final String methodName,
+            Object[] args, Class<?>[] parameterTypes)
+            throws NoSuchMethodException, IllegalAccessException,
+            InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        parameterTypes = ArrayUtils.nullToEmpty(parameterTypes);
+        final Method method = getMatchingAccessibleMethod(cls, methodName,
+                parameterTypes);
+        if (method == null) {
+            throw new NoSuchMethodException("No such accessible method: "
+                    + methodName + "() on class: " + cls.getName());
+        }
+        args = toVarArgs(method, args);
+        return method.invoke(null, args);
+    }
+
+    private static Object[] toVarArgs(Method method, Object[] args) {
+        if (method.isVarArgs()) {
+            Class<?>[] methodParameterTypes = method.getParameterTypes();
+            args = getVarArgs(args, methodParameterTypes);
+        }
+        return args;
+    }
+
+    /**
+     * <p>Given an arguments array passed to a varargs method, return an array of arguments in the canonical form,
+     * i.e. an array with the declared number of parameters, and whose last parameter is an array of the varargs type.
+     * </p>
+     *
+     * @param args the array of arguments passed to the varags method
+     * @param methodParameterTypes the declared array of method parameter types
+     * @return an array of the variadic arguments passed to the method
+     * @since 3.5
+     */
+    static Object[] getVarArgs(Object[] args, Class<?>[] methodParameterTypes) {
+        if (args.length == methodParameterTypes.length
+                && args[args.length - 1].getClass().equals(methodParameterTypes[methodParameterTypes.length - 1])) {
+            // The args array is already in the canonical form for the method.
+            return args;
+        }
+
+        // Construct a new array matching the method's declared parameter types.
+        Object[] newArgs = new Object[methodParameterTypes.length];
+
+        // Copy the normal (non-varargs) parameters
+        System.arraycopy(args, 0, newArgs, 0, methodParameterTypes.length - 1);
+
+        // Construct a new array for the variadic parameters
+        Class<?> varArgComponentType = methodParameterTypes[methodParameterTypes.length - 1].getComponentType();
+        int varArgLength = args.length - methodParameterTypes.length + 1;
+
+        Object varArgsArray = Array.newInstance(ClassUtils.primitiveToWrapper(varArgComponentType), varArgLength);
+        // Copy the variadic arguments into the varargs array.
+        System.arraycopy(args, methodParameterTypes.length - 1, varArgsArray, 0, varArgLength);
+
+        if(varArgComponentType.isPrimitive()) {
+            // unbox from wrapper type to primitive type
+            varArgsArray = ArrayUtils.toPrimitive(varArgsArray);
+        }
+
+        // Store the varargs array in the last position of the array to return
+        newArgs[methodParameterTypes.length - 1] = varArgsArray;
+
+        // Return the canonical varargs array.
+        return newArgs;
+    }
+
+    /**
+     * <p>Invokes a {@code static} method whose parameter types match exactly the object
+     * types.</p>
+     *
+     * <p>This uses reflection to invoke the method obtained from a call to
+     * {@link #getAccessibleMethod(Class, String, Class[])}.</p>
+     *
+     * @param cls invoke static method on this class
+     * @param methodName get method with this name
+     * @param args use these arguments - treat {@code null} as empty array
+     * @return The value returned by the invoked method
+     *
+     * @throws NoSuchMethodException if there is no such accessible method
+     * @throws InvocationTargetException wraps an exception thrown by the
+     *  method invoked
+     * @throws IllegalAccessException if the requested method is not accessible
+     *  via reflection
+     */
+    public static Object invokeExactStaticMethod(final Class<?> cls, final String methodName,
+            Object... args) throws NoSuchMethodException,
+            IllegalAccessException, InvocationTargetException {
+        args = ArrayUtils.nullToEmpty(args);
+        final Class<?>[] parameterTypes = ClassUtils.toClass(args);
+        return invokeExactStaticMethod(cls, methodName, args, parameterTypes);
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) with given name and parameters. If no such method
+     * can be found, return {@code null}.
+     * This is just a convenience wrapper for
+     * {@link #getAccessibleMethod(Method)}.</p>
+     *
+     * @param cls get method from this class
+     * @param methodName get method with this name
+     * @param parameterTypes with these parameters types
+     * @return The accessible method
+     */
+    public static Method getAccessibleMethod(final Class<?> cls, final String methodName,
+            final Class<?>... parameterTypes) {
+        try {
+            return getAccessibleMethod(cls.getMethod(methodName,
+                    parameterTypes));
+        } catch (final NoSuchMethodException e) {
+            return null;
+        }
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) that implements the specified Method. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * @param method The method that we wish to call
+     * @return The accessible method
+     */
+    public static Method getAccessibleMethod(Method method) {
+        if (!MemberUtils.isAccessible(method)) {
+            return null;
+        }
+        // If the declaring class is public, we are done
+        final Class<?> cls = method.getDeclaringClass();
+        if (Modifier.isPublic(cls.getModifiers())) {
+            return method;
+        }
+        final String methodName = method.getName();
+        final Class<?>[] parameterTypes = method.getParameterTypes();
+
+        // Check the implemented interfaces and subinterfaces
+        method = getAccessibleMethodFromInterfaceNest(cls, methodName,
+                parameterTypes);
+
+        // Check the superclass chain
+        if (method == null) {
+            method = getAccessibleMethodFromSuperclass(cls, methodName,
+                    parameterTypes);
+        }
+        return method;
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) by scanning through the superclasses. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * @param cls Class to be checked
+     * @param methodName Method name of the method we wish to call
+     * @param parameterTypes The parameter type signatures
+     * @return the accessible method or {@code null} if not found
+     */
+    private static Method getAccessibleMethodFromSuperclass(final Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        Class<?> parentClass = cls.getSuperclass();
+        while (parentClass != null) {
+            if (Modifier.isPublic(parentClass.getModifiers())) {
+                try {
+                    return parentClass.getMethod(methodName, parameterTypes);
+                } catch (final NoSuchMethodException e) {
+                    return null;
+                }
+            }
+            parentClass = parentClass.getSuperclass();
+        }
+        return null;
+    }
+
+    /**
+     * <p>Returns an accessible method (that is, one that can be invoked via
+     * reflection) that implements the specified method, by scanning through
+     * all implemented interfaces and subinterfaces. If no such method
+     * can be found, return {@code null}.</p>
+     *
+     * <p>There isn't any good reason why this method must be {@code private}.
+     * It is because there doesn't seem any reason why other classes should
+     * call this rather than the higher level methods.</p>
+     *
+     * @param cls Parent class for the interfaces to be checked
+     * @param methodName Method name of the method we wish to call
+     * @param parameterTypes The parameter type signatures
+     * @return the accessible method or {@code null} if not found
+     */
+    private static Method getAccessibleMethodFromInterfaceNest(Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        // Search up the superclass chain
+        for (; cls != null; cls = cls.getSuperclass()) {
+
+            // Check the implemented interfaces of the parent class
+            final Class<?>[] interfaces = cls.getInterfaces();
+            for (int i = 0; i < interfaces.length; i++) {
+                // Is this interface public?
+                if (!Modifier.isPublic(interfaces[i].getModifiers())) {
+                    continue;
+                }
+                // Does the method exist on this interface?
+                try {
+                    return interfaces[i].getDeclaredMethod(methodName,
+                            parameterTypes);
+                } catch (final NoSuchMethodException e) { // NOPMD
+                    /*
+                     * Swallow, if no method is found after the loop then this
+                     * method returns null.
+                     */
+                }
+                // Recursively check our parent interfaces
+                final Method method = getAccessibleMethodFromInterfaceNest(interfaces[i],
+                        methodName, parameterTypes);
+                if (method != null) {
+                    return method;
+                }
+            }
+        }
+        return null;
+    }
+
+    /**
+     * <p>Finds an accessible method that matches the given name and has compatible parameters.
+     * Compatible parameters mean that every method parameter is assignable from 
+     * the given parameters.
+     * In other words, it finds a method with the given name 
+     * that will take the parameters given.</p>
+     *
+     * <p>This method is used by 
+     * {@link 
+     * #invokeMethod(Object object, String methodName, Object[] args, Class[] parameterTypes)}.
+     * </p>
+     *
+     * <p>This method can match primitive parameter by passing in wrapper classes.
+     * For example, a {@code Boolean} will match a primitive {@code boolean}
+     * parameter.
+     * </p>
+     *
+     * @param cls find method in this class
+     * @param methodName find method with this name
+     * @param parameterTypes find method with most compatible parameters 
+     * @return The accessible method
+     */
+    public static Method getMatchingAccessibleMethod(final Class<?> cls,
+            final String methodName, final Class<?>... parameterTypes) {
+        try {
+            final Method method = cls.getMethod(methodName, parameterTypes);
+            MemberUtils.setAccessibleWorkaround(method);
+            return method;
+        } catch (final NoSuchMethodException e) { // NOPMD - Swallow the exception
+        }
+        // search through all methods
+        Method bestMatch = null;
+        final Method[] methods = cls.getMethods();
+        for (final Method method : methods) {
+            // compare name and parameters
+            if (method.getName().equals(methodName) &&
+                    MemberUtils.isMatchingMethod(method, parameterTypes)) {
+                // get accessible version of method
+                final Method accessibleMethod = getAccessibleMethod(method);
+                if (accessibleMethod != null && (bestMatch == null || MemberUtils.compareMethodFit(
+                            accessibleMethod,
+                            bestMatch,
+                            parameterTypes) < 0)) {
+                    bestMatch = accessibleMethod;
+                }
+            }
+        }
+        if (bestMatch != null) {
+            MemberUtils.setAccessibleWorkaround(bestMatch);
+        }
+        return bestMatch;
+    }
+    
+    /**
+     * <p>Retrieves a method whether or not it's accessible. If no such method
+     * can be found, return {@code null}.</p>
+     * @param cls The class that will be subjected to the method search
+     * @param methodName The method that we wish to call
+     * @param parameterTypes Argument class types
+     * @return The method
+     * 
+     * @since 3.5
+     */
+    public static Method getMatchingMethod(final Class<?> cls, final String methodName,
+            final Class<?>... parameterTypes) {
+        Validate.notNull(cls, "Null class not allowed.");
+        Validate.notEmpty(methodName, "Null or blank methodName not allowed.");
+
+        // Address methods in superclasses
+        Method[] methodArray = cls.getDeclaredMethods();
+        List<Class<?>> superclassList = ClassUtils.getAllSuperclasses(cls);
+        for (Class<?> klass : superclassList) {
+            methodArray = ArrayUtils.addAll(methodArray, klass.getDeclaredMethods());
+        }
+
+        Method inexactMatch = null;
+        for (Method method : methodArray) {
+            if (methodName.equals(method.getName()) &&
+                    ArrayUtils.isEquals(parameterTypes, method.getParameterTypes())) {
+                return method;
+            } else if (methodName.equals(method.getName()) &&
+                    ClassUtils.isAssignable(parameterTypes, method.getParameterTypes(), true)) {
+                if (inexactMatch == null) {
+                    inexactMatch = method;
+                } else if (distance(parameterTypes, method.getParameterTypes())
+                        < distance(parameterTypes, inexactMatch.getParameterTypes())) {
+                    inexactMatch = method;
+                }
+            }
+
+        }
+        return inexactMatch;
+    }
+    
+    /**
+     * <p>Returns the aggregate number of inheritance hops between assignable argument class types.  Returns -1
+     * if the arguments aren't assignable.  Fills a specific purpose for getMatchingMethod and is not generalized.</p>
+     * @param classArray
+     * @param toClassArray
+     * @return the aggregate number of inheritance hops between assignable argument class types.
+     */
+    private static int distance(Class<?>[] classArray, Class<?>[] toClassArray) {
+        int answer = 0;
+
+        if (!ClassUtils.isAssignable(classArray, toClassArray, true)) {
+            return -1;
+        }
+        for (int offset = 0; offset < classArray.length; offset++) {
+            // Note InheritanceUtils.distance() uses different scoring system.
+            if (classArray[offset].equals(toClassArray[offset])) {
+                continue;
+            } else if (ClassUtils.isAssignable(classArray[offset], toClassArray[offset], true)
+                    && !ClassUtils.isAssignable(classArray[offset], toClassArray[offset], false)) {
+                answer++;
+            } else {
+                answer = answer + 2;
+            }
+        }
+
+        return answer;
+    }
+
+    /**
+     * Get the hierarchy of overridden methods down to {@code result} respecting generics.
+     * @param method lowest to consider
+     * @param interfacesBehavior whether to search interfaces, {@code null} {@code implies} false
+     * @return Set&lt;Method&gt; in ascending order from sub- to superclass
+     * @throws NullPointerException if the specified method is {@code null}
+     * @since 3.2
+     */
+/**
+ * Get the hierarchy of overridden methods down to {@code result} respecting generics.
+ *
+ * @param method
+ * 		lowest to consider
+ * @param interfacesBehavior
+ * 		whether to search interfaces, {@code null} {@code implies} false
+ * @return Set&lt;Method&gt; in ascending order from sub- to superclass
+ * @throws NullPointerException
+ * 		if the specified method is {@code null}
+ * @since 3.2
+ */
+public static java.util.Set<java.lang.reflect.Method> getOverrideHierarchy(final java.lang.reflect.Method method, final org.apache.commons.lang3.ClassUtils.Interfaces interfacesBehavior) {
+    org.apache.commons.lang3.Validate.notNull(method);
+    final java.util.Set<java.lang.reflect.Method> result = new java.util.LinkedHashSet<java.lang.reflect.Method>();
+    result.add(method);
+    final java.lang.Class<?>[] parameterTypes = method.getParameterTypes();
+    final java.lang.Class<?> declaringClass = method.getDeclaringClass();
+    final java.util.Iterator<java.lang.Class<?>> hierarchy = org.apache.commons.lang3.ClassUtils.hierarchy(declaringClass, interfacesBehavior).iterator();
+    // skip the declaring class :P
+    hierarchy.next();
+    hierarchyTraversal : while (hierarchy.hasNext()) {
+        final java.lang.Class<?> c = hierarchy.next();
+        final java.lang.reflect.Method m = org.apache.commons.lang3.reflect.MethodUtils.getMatchingAccessibleMethod(c, method.getName(), parameterTypes);
+        {
+            if (java.util.Arrays.equals(/* NPEX_NULL_EXP */
+            m.getParameterTypes(), parameterTypes)) {
+                // matches without generics
+                result.add(m);
+                continue;
+            }
+            // necessary to get arguments every time in the case that we are including interfaces
+            final java.util.Map<java.lang.reflect.TypeVariable<?>, java.lang.reflect.Type> typeArguments = org.apache.commons.lang3.reflect.TypeUtils.getTypeArguments(declaringClass, m.getDeclaringClass());
+            for (int i = 0; i < parameterTypes.length; i++) {
+                final java.lang.reflect.Type childType = org.apache.commons.lang3.reflect.TypeUtils.unrollVariables(typeArguments, method.getGenericParameterTypes()[i]);
+                final java.lang.reflect.Type parentType = org.apache.commons.lang3.reflect.TypeUtils.unrollVariables(typeArguments, m.getGenericParameterTypes()[i]);
+                if (!org.apache.commons.lang3.reflect.TypeUtils.equals(childType, parentType)) {
+                    continue hierarchyTraversal;
+                }
+            }
+            result.add(m);
+        }
+    } 
+    return result;
+}
+
+    /**
+     * Gets all methods of the given class that are annotated with the given annotation.
+     * @param cls
+     *            the {@link Class} to query
+     * @param annotationCls
+     *            the {@link java.lang.annotation.Annotation} that must be present on a method to be matched
+     * @return an array of Methods (possibly empty).
+     * @throws IllegalArgumentException
+     *            if the class or annotation are {@code null}
+     * @since 3.4
+     */
+    public static Method[] getMethodsWithAnnotation(final Class<?> cls, final Class<? extends Annotation> annotationCls) {
+        final List<Method> annotatedMethodsList = getMethodsListWithAnnotation(cls, annotationCls);
+        return annotatedMethodsList.toArray(new Method[annotatedMethodsList.size()]);
+    }
+
+    /**
+     * Gets all methods of the given class that are annotated with the given annotation.
+     * @param cls
+     *            the {@link Class} to query
+     * @param annotationCls
+     *            the {@link Annotation} that must be present on a method to be matched
+     * @return a list of Methods (possibly empty).
+     * @throws IllegalArgumentException
+     *            if the class or annotation are {@code null}
+     * @since 3.4
+     */
+    public static List<Method> getMethodsListWithAnnotation(final Class<?> cls, final Class<? extends Annotation> annotationCls) {
+        Validate.isTrue(cls != null, "The class must not be null");
+        Validate.isTrue(annotationCls != null, "The annotation class must not be null");
+        final Method[] allMethods = cls.getMethods();
+        final List<Method> annotatedMethods = new ArrayList<Method>();
+        for (final Method method : allMethods) {
+            if (method.getAnnotation(annotationCls) != null) {
+                annotatedMethods.add(method);
+            }
+        }
+        return annotatedMethods;
+    }
+
+}
diff --git a/Java/commons-lang-MethodUtils_810/metadata.json b/Java/commons-lang-MethodUtils_810/metadata.json
new file mode 100644
index 000000000..a3b9a18fd
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_810/metadata.json
@@ -0,0 +1,21 @@
+{
+  "language": "java",
+  "id": "commons-lang-MethodUtils_810",
+  "buggyPath": ".",
+  "referencePath": null,
+  "buildCommand": "mvn package -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100 -DskipTests=true -DskipITs=true -Dtest=None -DfailIfNoTests=false",
+  "testCommand": "mvn test -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100",
+  "categories": [
+    "safety",
+    "npe"
+  ],
+  "npe": {
+    "filepath": "src/main/java/org/apache/commons/lang3/reflect/MethodUtils.java",
+    "line": 821,
+    "npe_method": "getOverrideHierarchy",
+    "deref_field": "m",
+    "npe_class": "MethodUtils",
+    "repo": "commons-lang",
+    "bug_id": "MethodUtils_810"
+  }
+}
diff --git a/Java/commons-lang-MethodUtils_810/npe.json b/Java/commons-lang-MethodUtils_810/npe.json
new file mode 100644
index 000000000..b6d7d238b
--- /dev/null
+++ b/Java/commons-lang-MethodUtils_810/npe.json
@@ -0,0 +1,7 @@
+{
+    "filepath": "src/main/java/org/apache/commons/lang3/reflect/MethodUtils.java",
+    "line": 821,
+    "npe_method": "getOverrideHierarchy",
+    "deref_field": "m",
+    "npe_class": "MethodUtils"
+}
\ No newline at end of file
diff --git a/Java/commons-lang-MultiBackgroundInitializer_134/Dockerfile b/Java/commons-lang-MultiBackgroundInitializer_134/Dockerfile
new file mode 100644
index 000000000..7b7fbe349
--- /dev/null
+++ b/Java/commons-lang-MultiBackgroundInitializer_134/Dockerfile
@@ -0,0 +1,18 @@
+FROM ghcr.io/kupl/starlab-benchmarks/java-base:commons-lang
+
+ENV TZ=Asia/Seoul
+
+COPY ./metadata.json .
+COPY ./npe.json .
+COPY ./buggy.java /tmp/buggy.java
+RUN export BUGGY_PATH=$(cat metadata.json | jq -r ".npe.filepath") \
+    && export BUGGY_LINE=$(cat metadata.json | jq -r ".npe.line") \
+    && export BUGGY_MTHD=$(cat metadata.json | jq -r ".npe.npe_method") \
+    && mv /tmp/buggy.java $BUGGY_PATH \
+    && echo "[{\"filepath\": \"$BUGGY_PATH\", \"line\": $BUGGY_LINE, \"method_name\": \"$BUGGY_MTHD\"}]" | jq . > traces.json
+
+RUN git init . && git add -A
+
+RUN $(cat metadata.json | jq -r ".buildCommand")
+
+RUN $(cat metadata.json | jq -r ".testCommand"); if [ $? -eq 0 ]; then exit 1; fi
diff --git a/Java/commons-lang-MultiBackgroundInitializer_134/buggy.java b/Java/commons-lang-MultiBackgroundInitializer_134/buggy.java
new file mode 100644
index 000000000..682438531
--- /dev/null
+++ b/Java/commons-lang-MultiBackgroundInitializer_134/buggy.java
@@ -0,0 +1,363 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.lang3.concurrent;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.NoSuchElementException;
+import java.util.Set;
+import java.util.concurrent.ExecutorService;
+
+/**
+ * <p>
+ * A specialized {@link BackgroundInitializer} implementation that can deal with
+ * multiple background initialization tasks.
+ * </p>
+ * <p>
+ * This class has a similar purpose as {@link BackgroundInitializer}. However,
+ * it is not limited to a single background initialization task. Rather it
+ * manages an arbitrary number of {@code BackgroundInitializer} objects,
+ * executes them, and waits until they are completely initialized. This is
+ * useful for applications that have to perform multiple initialization tasks
+ * that can run in parallel (i.e. that do not depend on each other). This class
+ * takes care about the management of an {@code ExecutorService} and shares it
+ * with the {@code BackgroundInitializer} objects it is responsible for; so the
+ * using application need not bother with these details.
+ * </p>
+ * <p>
+ * The typical usage scenario for {@code MultiBackgroundInitializer} is as
+ * follows:
+ * </p>
+ * <ul>
+ * <li>Create a new instance of the class. Optionally pass in a pre-configured
+ * {@code ExecutorService}. Alternatively {@code MultiBackgroundInitializer} can
+ * create a temporary {@code ExecutorService} and delete it after initialization
+ * is complete.</li>
+ * <li>Create specialized {@link BackgroundInitializer} objects for the
+ * initialization tasks to be performed and add them to the {@code
+ * MultiBackgroundInitializer} using the
+ * {@link #addInitializer(String, BackgroundInitializer)} method.</li>
+ * <li>After all initializers have been added, call the {@link #start()} method.
+ * </li>
+ * <li>When access to the result objects produced by the {@code
+ * BackgroundInitializer} objects is needed call the {@link #get()} method. The
+ * object returned here provides access to all result objects created during
+ * initialization. It also stores information about exceptions that have
+ * occurred.</li>
+ * </ul>
+ * <p>
+ * {@code MultiBackgroundInitializer} starts a special controller task that
+ * starts all {@code BackgroundInitializer} objects added to the instance.
+ * Before the an initializer is started it is checked whether this initializer
+ * already has an {@code ExecutorService} set. If this is the case, this {@code
+ * ExecutorService} is used for running the background task. Otherwise the
+ * current {@code ExecutorService} of this {@code MultiBackgroundInitializer} is
+ * shared with the initializer.
+ * </p>
+ * <p>
+ * The easiest way of using this class is to let it deal with the management of
+ * an {@code ExecutorService} itself: If no external {@code ExecutorService} is
+ * provided, the class creates a temporary {@code ExecutorService} (that is
+ * capable of executing all background tasks in parallel) and destroys it at the
+ * end of background processing.
+ * </p>
+ * <p>
+ * Alternatively an external {@code ExecutorService} can be provided - either at
+ * construction time or later by calling the
+ * {@link #setExternalExecutor(ExecutorService)} method. In this case all
+ * background tasks are scheduled at this external {@code ExecutorService}.
+ * <strong>Important note:</strong> When using an external {@code
+ * ExecutorService} be sure that the number of threads managed by the service is
+ * large enough. Otherwise a deadlock can happen! This is the case in the
+ * following scenario: {@code MultiBackgroundInitializer} starts a task that
+ * starts all registered {@code BackgroundInitializer} objects and waits for
+ * their completion. If for instance a single threaded {@code ExecutorService}
+ * is used, none of the background tasks can be executed, and the task created
+ * by {@code MultiBackgroundInitializer} waits forever.
+ * </p>
+ *
+ * @since 3.0
+ */
+public class MultiBackgroundInitializer
+        extends
+        BackgroundInitializer<MultiBackgroundInitializer.MultiBackgroundInitializerResults> {
+    /** A map with the child initializers. */
+    private final Map<String, BackgroundInitializer<?>> childInitializers =
+        new HashMap<String, BackgroundInitializer<?>>();
+
+    /**
+     * Creates a new instance of {@code MultiBackgroundInitializer}.
+     */
+    public MultiBackgroundInitializer() {
+        super();
+    }
+
+    /**
+     * Creates a new instance of {@code MultiBackgroundInitializer} and
+     * initializes it with the given external {@code ExecutorService}.
+     *
+     * @param exec the {@code ExecutorService} for executing the background
+     * tasks
+     */
+    public MultiBackgroundInitializer(final ExecutorService exec) {
+        super(exec);
+    }
+
+    /**
+     * Adds a new {@code BackgroundInitializer} to this object. When this
+     * {@code MultiBackgroundInitializer} is started, the given initializer will
+     * be processed. This method must not be called after {@link #start()} has
+     * been invoked.
+     *
+     * @param name the name of the initializer (must not be <b>null</b>)
+     * @param init the {@code BackgroundInitializer} to add (must not be
+     * <b>null</b>)
+     * @throws IllegalArgumentException if a required parameter is missing
+     * @throws IllegalStateException if {@code start()} has already been called
+     */
+/**
+ * Adds a new {@code BackgroundInitializer} to this object. When this
+ * {@code MultiBackgroundInitializer} is started, the given initializer will
+ * be processed. This method must not be called after {@link #start()} has
+ * been invoked.
+ *
+ * @param name
+ * 		the name of the initializer (must not be <b>null</b>)
+ * @param init
+ * 		the {@code BackgroundInitializer} to add (must not be
+ * 		<b>null</b>)
+ * @throws IllegalArgumentException
+ * 		if a required parameter is missing
+ * @throws IllegalStateException
+ * 		if {@code start()} has already been called
+ */
+public void addInitializer(final java.lang.String name, final org.apache.commons.lang3.concurrent.BackgroundInitializer<?> init) {
+    {
+        if (init == null) {
+            throw new java.lang.IllegalArgumentException("Child initializer must not be null!");
+        }
+        synchronized(this) {
+            if (isStarted()) {
+                throw new java.lang.IllegalStateException("addInitializer() must not be called after start()!");
+            }
+            childInitializers.put(/* NPEX_NULL_EXP */
+            name, init);
+        }
+    }
+}
+
+    /**
+     * Returns the number of tasks needed for executing all child {@code
+     * BackgroundInitializer} objects in parallel. This implementation sums up
+     * the required tasks for all child initializers (which is necessary if one
+     * of the child initializers is itself a {@code MultiBackgroundInitializer}
+     * ). Then it adds 1 for the control task that waits for the completion of
+     * the children.
+     *
+     * @return the number of tasks required for background processing
+     */
+    @Override
+    protected int getTaskCount() {
+        int result = 1;
+
+        for (final BackgroundInitializer<?> bi : childInitializers.values()) {
+            result += bi.getTaskCount();
+        }
+
+        return result;
+    }
+
+    /**
+     * Creates the results object. This implementation starts all child {@code
+     * BackgroundInitializer} objects. Then it collects their results and
+     * creates a {@code MultiBackgroundInitializerResults} object with this
+     * data. If a child initializer throws a checked exceptions, it is added to
+     * the results object. Unchecked exceptions are propagated.
+     *
+     * @return the results object
+     * @throws Exception if an error occurs
+     */
+    @Override
+    protected MultiBackgroundInitializerResults initialize() throws Exception {
+        Map<String, BackgroundInitializer<?>> inits;
+        synchronized (this) {
+            // create a snapshot to operate on
+            inits = new HashMap<String, BackgroundInitializer<?>>(
+                    childInitializers);
+        }
+
+        // start the child initializers
+        final ExecutorService exec = getActiveExecutor();
+        for (final BackgroundInitializer<?> bi : inits.values()) {
+            if (bi.getExternalExecutor() == null) {
+                // share the executor service if necessary
+                bi.setExternalExecutor(exec);
+            }
+            bi.start();
+        }
+
+        // collect the results
+        final Map<String, Object> results = new HashMap<String, Object>();
+        final Map<String, ConcurrentException> excepts = new HashMap<String, ConcurrentException>();
+        for (final Map.Entry<String, BackgroundInitializer<?>> e : inits.entrySet()) {
+            try {
+                results.put(e.getKey(), e.getValue().get());
+            } catch (final ConcurrentException cex) {
+                excepts.put(e.getKey(), cex);
+            }
+        }
+
+        return new MultiBackgroundInitializerResults(inits, results, excepts);
+    }
+
+    /**
+     * A data class for storing the results of the background initialization
+     * performed by {@code MultiBackgroundInitializer}. Objects of this inner
+     * class are returned by {@link MultiBackgroundInitializer#initialize()}.
+     * They allow access to all result objects produced by the
+     * {@link BackgroundInitializer} objects managed by the owning instance. It
+     * is also possible to retrieve status information about single
+     * {@link BackgroundInitializer}s, i.e. whether they completed normally or
+     * caused an exception.
+     */
+    public static class MultiBackgroundInitializerResults {
+        /** A map with the child initializers. */
+        private final Map<String, BackgroundInitializer<?>> initializers;
+
+        /** A map with the result objects. */
+        private final Map<String, Object> resultObjects;
+
+        /** A map with the exceptions. */
+        private final Map<String, ConcurrentException> exceptions;
+
+        /**
+         * Creates a new instance of {@code MultiBackgroundInitializerResults}
+         * and initializes it with maps for the {@code BackgroundInitializer}
+         * objects, their result objects and the exceptions thrown by them.
+         *
+         * @param inits the {@code BackgroundInitializer} objects
+         * @param results the result objects
+         * @param excepts the exceptions
+         */
+        private MultiBackgroundInitializerResults(
+                final Map<String, BackgroundInitializer<?>> inits,
+                final Map<String, Object> results,
+                final Map<String, ConcurrentException> excepts) {
+            initializers = inits;
+            resultObjects = results;
+            exceptions = excepts;
+        }
+
+        /**
+         * Returns the {@code BackgroundInitializer} with the given name. If the
+         * name cannot be resolved, an exception is thrown.
+         *
+         * @param name the name of the {@code BackgroundInitializer}
+         * @return the {@code BackgroundInitializer} with this name
+         * @throws NoSuchElementException if the name cannot be resolved
+         */
+        public BackgroundInitializer<?> getInitializer(final String name) {
+            return checkName(name);
+        }
+
+        /**
+         * Returns the result object produced by the {@code
+         * BackgroundInitializer} with the given name. This is the object
+         * returned by the initializer's {@code initialize()} method. If this
+         * {@code BackgroundInitializer} caused an exception, <b>null</b> is
+         * returned. If the name cannot be resolved, an exception is thrown.
+         *
+         * @param name the name of the {@code BackgroundInitializer}
+         * @return the result object produced by this {@code
+         * BackgroundInitializer}
+         * @throws NoSuchElementException if the name cannot be resolved
+         */
+        public Object getResultObject(final String name) {
+            checkName(name);
+            return resultObjects.get(name);
+        }
+
+        /**
+         * Returns a flag whether the {@code BackgroundInitializer} with the
+         * given name caused an exception.
+         *
+         * @param name the name of the {@code BackgroundInitializer}
+         * @return a flag whether this initializer caused an exception
+         * @throws NoSuchElementException if the name cannot be resolved
+         */
+        public boolean isException(final String name) {
+            checkName(name);
+            return exceptions.containsKey(name);
+        }
+
+        /**
+         * Returns the {@code ConcurrentException} object that was thrown by the
+         * {@code BackgroundInitializer} with the given name. If this
+         * initializer did not throw an exception, the return value is
+         * <b>null</b>. If the name cannot be resolved, an exception is thrown.
+         *
+         * @param name the name of the {@code BackgroundInitializer}
+         * @return the exception thrown by this initializer
+         * @throws NoSuchElementException if the name cannot be resolved
+         */
+        public ConcurrentException getException(final String name) {
+            checkName(name);
+            return exceptions.get(name);
+        }
+
+        /**
+         * Returns a set with the names of all {@code BackgroundInitializer}
+         * objects managed by the {@code MultiBackgroundInitializer}.
+         *
+         * @return an (unmodifiable) set with the names of the managed {@code
+         * BackgroundInitializer} objects
+         */
+        public Set<String> initializerNames() {
+            return Collections.unmodifiableSet(initializers.keySet());
+        }
+
+        /**
+         * Returns a flag whether the whole initialization was successful. This
+         * is the case if no child initializer has thrown an exception.
+         *
+         * @return a flag whether the initialization was successful
+         */
+        public boolean isSuccessful() {
+            return exceptions.isEmpty();
+        }
+
+        /**
+         * Checks whether an initializer with the given name exists. If not,
+         * throws an exception. If it exists, the associated child initializer
+         * is returned.
+         *
+         * @param name the name to check
+         * @return the initializer with this name
+         * @throws NoSuchElementException if the name is unknown
+         */
+        private BackgroundInitializer<?> checkName(final String name) {
+            final BackgroundInitializer<?> init = initializers.get(name);
+            if (init == null) {
+                throw new NoSuchElementException(
+                        "No child initializer with name " + name);
+            }
+
+            return init;
+        }
+    }
+}
diff --git a/Java/commons-lang-MultiBackgroundInitializer_134/metadata.json b/Java/commons-lang-MultiBackgroundInitializer_134/metadata.json
new file mode 100644
index 000000000..9ab5a8eba
--- /dev/null
+++ b/Java/commons-lang-MultiBackgroundInitializer_134/metadata.json
@@ -0,0 +1,21 @@
+{
+  "language": "java",
+  "id": "commons-lang-MultiBackgroundInitializer_134",
+  "buggyPath": ".",
+  "referencePath": null,
+  "buildCommand": "mvn package -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100 -DskipTests=true -DskipITs=true -Dtest=None -DfailIfNoTests=false",
+  "testCommand": "mvn test -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100",
+  "categories": [
+    "safety",
+    "npe"
+  ],
+  "npe": {
+    "filepath": "src/main/java/org/apache/commons/lang3/concurrent/MultiBackgroundInitializer.java",
+    "line": 159,
+    "npe_method": "addInitializer",
+    "deref_field": "name",
+    "npe_class": "MultiBackgroundInitializer",
+    "repo": "commons-lang",
+    "bug_id": "MultiBackgroundInitializer_134"
+  }
+}
diff --git a/Java/commons-lang-MultiBackgroundInitializer_134/npe.json b/Java/commons-lang-MultiBackgroundInitializer_134/npe.json
new file mode 100644
index 000000000..d79ec6c21
--- /dev/null
+++ b/Java/commons-lang-MultiBackgroundInitializer_134/npe.json
@@ -0,0 +1,7 @@
+{
+    "filepath": "src/main/java/org/apache/commons/lang3/concurrent/MultiBackgroundInitializer.java",
+    "line": 159,
+    "npe_method": "addInitializer",
+    "deref_field": "name",
+    "npe_class": "MultiBackgroundInitializer"
+}
\ No newline at end of file
diff --git a/Java/commons-lang-MultiBackgroundInitializer_138/Dockerfile b/Java/commons-lang-MultiBackgroundInitializer_138/Dockerfile
new file mode 100644
index 000000000..7b7fbe349
--- /dev/null
+++ b/Java/commons-lang-MultiBackgroundInitializer_138/Dockerfile
@@ -0,0 +1,18 @@
+FROM ghcr.io/kupl/starlab-benchmarks/java-base:commons-lang
+
+ENV TZ=Asia/Seoul
+
+COPY ./metadata.json .
+COPY ./npe.json .
+COPY ./buggy.java /tmp/buggy.java
+RUN export BUGGY_PATH=$(cat metadata.json | jq -r ".npe.filepath") \
+    && export BUGGY_LINE=$(cat metadata.json | jq -r ".npe.line") \
+    && export BUGGY_MTHD=$(cat metadata.json | jq -r ".npe.npe_method") \
+    && mv /tmp/buggy.java $BUGGY_PATH \
+    && echo "[{\"filepath\": \"$BUGGY_PATH\", \"line\": $BUGGY_LINE, \"method_name\": \"$BUGGY_MTHD\"}]" | jq . > traces.json
+
+RUN git init . && git add -A
+
+RUN $(cat metadata.json | jq -r ".buildCommand")
+
+RUN $(cat metadata.json | jq -r ".testCommand"); if [ $? -eq 0 ]; then exit 1; fi
diff --git a/Java/commons-lang-MultiBackgroundInitializer_138/buggy.java b/Java/commons-lang-MultiBackgroundInitializer_138/buggy.java
new file mode 100644
index 000000000..6c440f36e
--- /dev/null
+++ b/Java/commons-lang-MultiBackgroundInitializer_138/buggy.java
@@ -0,0 +1,363 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.lang3.concurrent;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.NoSuchElementException;
+import java.util.Set;
+import java.util.concurrent.ExecutorService;
+
+/**
+ * <p>
+ * A specialized {@link BackgroundInitializer} implementation that can deal with
+ * multiple background initialization tasks.
+ * </p>
+ * <p>
+ * This class has a similar purpose as {@link BackgroundInitializer}. However,
+ * it is not limited to a single background initialization task. Rather it
+ * manages an arbitrary number of {@code BackgroundInitializer} objects,
+ * executes them, and waits until they are completely initialized. This is
+ * useful for applications that have to perform multiple initialization tasks
+ * that can run in parallel (i.e. that do not depend on each other). This class
+ * takes care about the management of an {@code ExecutorService} and shares it
+ * with the {@code BackgroundInitializer} objects it is responsible for; so the
+ * using application need not bother with these details.
+ * </p>
+ * <p>
+ * The typical usage scenario for {@code MultiBackgroundInitializer} is as
+ * follows:
+ * </p>
+ * <ul>
+ * <li>Create a new instance of the class. Optionally pass in a pre-configured
+ * {@code ExecutorService}. Alternatively {@code MultiBackgroundInitializer} can
+ * create a temporary {@code ExecutorService} and delete it after initialization
+ * is complete.</li>
+ * <li>Create specialized {@link BackgroundInitializer} objects for the
+ * initialization tasks to be performed and add them to the {@code
+ * MultiBackgroundInitializer} using the
+ * {@link #addInitializer(String, BackgroundInitializer)} method.</li>
+ * <li>After all initializers have been added, call the {@link #start()} method.
+ * </li>
+ * <li>When access to the result objects produced by the {@code
+ * BackgroundInitializer} objects is needed call the {@link #get()} method. The
+ * object returned here provides access to all result objects created during
+ * initialization. It also stores information about exceptions that have
+ * occurred.</li>
+ * </ul>
+ * <p>
+ * {@code MultiBackgroundInitializer} starts a special controller task that
+ * starts all {@code BackgroundInitializer} objects added to the instance.
+ * Before the an initializer is started it is checked whether this initializer
+ * already has an {@code ExecutorService} set. If this is the case, this {@code
+ * ExecutorService} is used for running the background task. Otherwise the
+ * current {@code ExecutorService} of this {@code MultiBackgroundInitializer} is
+ * shared with the initializer.
+ * </p>
+ * <p>
+ * The easiest way of using this class is to let it deal with the management of
+ * an {@code ExecutorService} itself: If no external {@code ExecutorService} is
+ * provided, the class creates a temporary {@code ExecutorService} (that is
+ * capable of executing all background tasks in parallel) and destroys it at the
+ * end of background processing.
+ * </p>
+ * <p>
+ * Alternatively an external {@code ExecutorService} can be provided - either at
+ * construction time or later by calling the
+ * {@link #setExternalExecutor(ExecutorService)} method. In this case all
+ * background tasks are scheduled at this external {@code ExecutorService}.
+ * <strong>Important note:</strong> When using an external {@code
+ * ExecutorService} be sure that the number of threads managed by the service is
+ * large enough. Otherwise a deadlock can happen! This is the case in the
+ * following scenario: {@code MultiBackgroundInitializer} starts a task that
+ * starts all registered {@code BackgroundInitializer} objects and waits for
+ * their completion. If for instance a single threaded {@code ExecutorService}
+ * is used, none of the background tasks can be executed, and the task created
+ * by {@code MultiBackgroundInitializer} waits forever.
+ * </p>
+ *
+ * @since 3.0
+ */
+public class MultiBackgroundInitializer
+        extends
+        BackgroundInitializer<MultiBackgroundInitializer.MultiBackgroundInitializerResults> {
+    /** A map with the child initializers. */
+    private final Map<String, BackgroundInitializer<?>> childInitializers =
+        new HashMap<String, BackgroundInitializer<?>>();
+
+    /**
+     * Creates a new instance of {@code MultiBackgroundInitializer}.
+     */
+    public MultiBackgroundInitializer() {
+        super();
+    }
+
+    /**
+     * Creates a new instance of {@code MultiBackgroundInitializer} and
+     * initializes it with the given external {@code ExecutorService}.
+     *
+     * @param exec the {@code ExecutorService} for executing the background
+     * tasks
+     */
+    public MultiBackgroundInitializer(final ExecutorService exec) {
+        super(exec);
+    }
+
+    /**
+     * Adds a new {@code BackgroundInitializer} to this object. When this
+     * {@code MultiBackgroundInitializer} is started, the given initializer will
+     * be processed. This method must not be called after {@link #start()} has
+     * been invoked.
+     *
+     * @param name the name of the initializer (must not be <b>null</b>)
+     * @param init the {@code BackgroundInitializer} to add (must not be
+     * <b>null</b>)
+     * @throws IllegalArgumentException if a required parameter is missing
+     * @throws IllegalStateException if {@code start()} has already been called
+     */
+/**
+ * Adds a new {@code BackgroundInitializer} to this object. When this
+ * {@code MultiBackgroundInitializer} is started, the given initializer will
+ * be processed. This method must not be called after {@link #start()} has
+ * been invoked.
+ *
+ * @param name
+ * 		the name of the initializer (must not be <b>null</b>)
+ * @param init
+ * 		the {@code BackgroundInitializer} to add (must not be
+ * 		<b>null</b>)
+ * @throws IllegalArgumentException
+ * 		if a required parameter is missing
+ * @throws IllegalStateException
+ * 		if {@code start()} has already been called
+ */
+public void addInitializer(final java.lang.String name, final org.apache.commons.lang3.concurrent.BackgroundInitializer<?> init) {
+    if (name == null) {
+        throw new java.lang.IllegalArgumentException("Name of child initializer must not be null!");
+    }
+    {
+        synchronized(this) {
+            if (isStarted()) {
+                throw new java.lang.IllegalStateException("addInitializer() must not be called after start()!");
+            }
+            childInitializers.put(name, /* NPEX_NULL_EXP */
+            init);
+        }
+    }
+}
+
+    /**
+     * Returns the number of tasks needed for executing all child {@code
+     * BackgroundInitializer} objects in parallel. This implementation sums up
+     * the required tasks for all child initializers (which is necessary if one
+     * of the child initializers is itself a {@code MultiBackgroundInitializer}
+     * ). Then it adds 1 for the control task that waits for the completion of
+     * the children.
+     *
+     * @return the number of tasks required for background processing
+     */
+    @Override
+    protected int getTaskCount() {
+        int result = 1;
+
+        for (final BackgroundInitializer<?> bi : childInitializers.values()) {
+            result += bi.getTaskCount();
+        }
+
+        return result;
+    }
+
+    /**
+     * Creates the results object. This implementation starts all child {@code
+     * BackgroundInitializer} objects. Then it collects their results and
+     * creates a {@code MultiBackgroundInitializerResults} object with this
+     * data. If a child initializer throws a checked exceptions, it is added to
+     * the results object. Unchecked exceptions are propagated.
+     *
+     * @return the results object
+     * @throws Exception if an error occurs
+     */
+    @Override
+    protected MultiBackgroundInitializerResults initialize() throws Exception {
+        Map<String, BackgroundInitializer<?>> inits;
+        synchronized (this) {
+            // create a snapshot to operate on
+            inits = new HashMap<String, BackgroundInitializer<?>>(
+                    childInitializers);
+        }
+
+        // start the child initializers
+        final ExecutorService exec = getActiveExecutor();
+        for (final BackgroundInitializer<?> bi : inits.values()) {
+            if (bi.getExternalExecutor() == null) {
+                // share the executor service if necessary
+                bi.setExternalExecutor(exec);
+            }
+            bi.start();
+        }
+
+        // collect the results
+        final Map<String, Object> results = new HashMap<String, Object>();
+        final Map<String, ConcurrentException> excepts = new HashMap<String, ConcurrentException>();
+        for (final Map.Entry<String, BackgroundInitializer<?>> e : inits.entrySet()) {
+            try {
+                results.put(e.getKey(), e.getValue().get());
+            } catch (final ConcurrentException cex) {
+                excepts.put(e.getKey(), cex);
+            }
+        }
+
+        return new MultiBackgroundInitializerResults(inits, results, excepts);
+    }
+
+    /**
+     * A data class for storing the results of the background initialization
+     * performed by {@code MultiBackgroundInitializer}. Objects of this inner
+     * class are returned by {@link MultiBackgroundInitializer#initialize()}.
+     * They allow access to all result objects produced by the
+     * {@link BackgroundInitializer} objects managed by the owning instance. It
+     * is also possible to retrieve status information about single
+     * {@link BackgroundInitializer}s, i.e. whether they completed normally or
+     * caused an exception.
+     */
+    public static class MultiBackgroundInitializerResults {
+        /** A map with the child initializers. */
+        private final Map<String, BackgroundInitializer<?>> initializers;
+
+        /** A map with the result objects. */
+        private final Map<String, Object> resultObjects;
+
+        /** A map with the exceptions. */
+        private final Map<String, ConcurrentException> exceptions;
+
+        /**
+         * Creates a new instance of {@code MultiBackgroundInitializerResults}
+         * and initializes it with maps for the {@code BackgroundInitializer}
+         * objects, their result objects and the exceptions thrown by them.
+         *
+         * @param inits the {@code BackgroundInitializer} objects
+         * @param results the result objects
+         * @param excepts the exceptions
+         */
+        private MultiBackgroundInitializerResults(
+                final Map<String, BackgroundInitializer<?>> inits,
+                final Map<String, Object> results,
+                final Map<String, ConcurrentException> excepts) {
+            initializers = inits;
+            resultObjects = results;
+            exceptions = excepts;
+        }
+
+        /**
+         * Returns the {@code BackgroundInitializer} with the given name. If the
+         * name cannot be resolved, an exception is thrown.
+         *
+         * @param name the name of the {@code BackgroundInitializer}
+         * @return the {@code BackgroundInitializer} with this name
+         * @throws NoSuchElementException if the name cannot be resolved
+         */
+        public BackgroundInitializer<?> getInitializer(final String name) {
+            return checkName(name);
+        }
+
+        /**
+         * Returns the result object produced by the {@code
+         * BackgroundInitializer} with the given name. This is the object
+         * returned by the initializer's {@code initialize()} method. If this
+         * {@code BackgroundInitializer} caused an exception, <b>null</b> is
+         * returned. If the name cannot be resolved, an exception is thrown.
+         *
+         * @param name the name of the {@code BackgroundInitializer}
+         * @return the result object produced by this {@code
+         * BackgroundInitializer}
+         * @throws NoSuchElementException if the name cannot be resolved
+         */
+        public Object getResultObject(final String name) {
+            checkName(name);
+            return resultObjects.get(name);
+        }
+
+        /**
+         * Returns a flag whether the {@code BackgroundInitializer} with the
+         * given name caused an exception.
+         *
+         * @param name the name of the {@code BackgroundInitializer}
+         * @return a flag whether this initializer caused an exception
+         * @throws NoSuchElementException if the name cannot be resolved
+         */
+        public boolean isException(final String name) {
+            checkName(name);
+            return exceptions.containsKey(name);
+        }
+
+        /**
+         * Returns the {@code ConcurrentException} object that was thrown by the
+         * {@code BackgroundInitializer} with the given name. If this
+         * initializer did not throw an exception, the return value is
+         * <b>null</b>. If the name cannot be resolved, an exception is thrown.
+         *
+         * @param name the name of the {@code BackgroundInitializer}
+         * @return the exception thrown by this initializer
+         * @throws NoSuchElementException if the name cannot be resolved
+         */
+        public ConcurrentException getException(final String name) {
+            checkName(name);
+            return exceptions.get(name);
+        }
+
+        /**
+         * Returns a set with the names of all {@code BackgroundInitializer}
+         * objects managed by the {@code MultiBackgroundInitializer}.
+         *
+         * @return an (unmodifiable) set with the names of the managed {@code
+         * BackgroundInitializer} objects
+         */
+        public Set<String> initializerNames() {
+            return Collections.unmodifiableSet(initializers.keySet());
+        }
+
+        /**
+         * Returns a flag whether the whole initialization was successful. This
+         * is the case if no child initializer has thrown an exception.
+         *
+         * @return a flag whether the initialization was successful
+         */
+        public boolean isSuccessful() {
+            return exceptions.isEmpty();
+        }
+
+        /**
+         * Checks whether an initializer with the given name exists. If not,
+         * throws an exception. If it exists, the associated child initializer
+         * is returned.
+         *
+         * @param name the name to check
+         * @return the initializer with this name
+         * @throws NoSuchElementException if the name is unknown
+         */
+        private BackgroundInitializer<?> checkName(final String name) {
+            final BackgroundInitializer<?> init = initializers.get(name);
+            if (init == null) {
+                throw new NoSuchElementException(
+                        "No child initializer with name " + name);
+            }
+
+            return init;
+        }
+    }
+}
diff --git a/Java/commons-lang-MultiBackgroundInitializer_138/metadata.json b/Java/commons-lang-MultiBackgroundInitializer_138/metadata.json
new file mode 100644
index 000000000..b5d38e5ad
--- /dev/null
+++ b/Java/commons-lang-MultiBackgroundInitializer_138/metadata.json
@@ -0,0 +1,21 @@
+{
+  "language": "java",
+  "id": "commons-lang-MultiBackgroundInitializer_138",
+  "buggyPath": ".",
+  "referencePath": null,
+  "buildCommand": "mvn package -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100 -DskipTests=true -DskipITs=true -Dtest=None -DfailIfNoTests=false",
+  "testCommand": "mvn test -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100",
+  "categories": [
+    "safety",
+    "npe"
+  ],
+  "npe": {
+    "filepath": "src/main/java/org/apache/commons/lang3/concurrent/MultiBackgroundInitializer.java",
+    "line": 159,
+    "npe_method": "addInitializer",
+    "deref_field": "init",
+    "npe_class": "MultiBackgroundInitializer",
+    "repo": "commons-lang",
+    "bug_id": "MultiBackgroundInitializer_138"
+  }
+}
diff --git a/Java/commons-lang-MultiBackgroundInitializer_138/npe.json b/Java/commons-lang-MultiBackgroundInitializer_138/npe.json
new file mode 100644
index 000000000..7c47accce
--- /dev/null
+++ b/Java/commons-lang-MultiBackgroundInitializer_138/npe.json
@@ -0,0 +1,7 @@
+{
+    "filepath": "src/main/java/org/apache/commons/lang3/concurrent/MultiBackgroundInitializer.java",
+    "line": 159,
+    "npe_method": "addInitializer",
+    "deref_field": "init",
+    "npe_class": "MultiBackgroundInitializer"
+}
\ No newline at end of file
diff --git a/Java/commons-lang-MultiBackgroundInitializer_343/Dockerfile b/Java/commons-lang-MultiBackgroundInitializer_343/Dockerfile
new file mode 100644
index 000000000..7b7fbe349
--- /dev/null
+++ b/Java/commons-lang-MultiBackgroundInitializer_343/Dockerfile
@@ -0,0 +1,18 @@
+FROM ghcr.io/kupl/starlab-benchmarks/java-base:commons-lang
+
+ENV TZ=Asia/Seoul
+
+COPY ./metadata.json .
+COPY ./npe.json .
+COPY ./buggy.java /tmp/buggy.java
+RUN export BUGGY_PATH=$(cat metadata.json | jq -r ".npe.filepath") \
+    && export BUGGY_LINE=$(cat metadata.json | jq -r ".npe.line") \
+    && export BUGGY_MTHD=$(cat metadata.json | jq -r ".npe.npe_method") \
+    && mv /tmp/buggy.java $BUGGY_PATH \
+    && echo "[{\"filepath\": \"$BUGGY_PATH\", \"line\": $BUGGY_LINE, \"method_name\": \"$BUGGY_MTHD\"}]" | jq . > traces.json
+
+RUN git init . && git add -A
+
+RUN $(cat metadata.json | jq -r ".buildCommand")
+
+RUN $(cat metadata.json | jq -r ".testCommand"); if [ $? -eq 0 ]; then exit 1; fi
diff --git a/Java/commons-lang-MultiBackgroundInitializer_343/buggy.java b/Java/commons-lang-MultiBackgroundInitializer_343/buggy.java
new file mode 100644
index 000000000..9d3f55f4c
--- /dev/null
+++ b/Java/commons-lang-MultiBackgroundInitializer_343/buggy.java
@@ -0,0 +1,360 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.lang3.concurrent;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.NoSuchElementException;
+import java.util.Set;
+import java.util.concurrent.ExecutorService;
+
+/**
+ * <p>
+ * A specialized {@link BackgroundInitializer} implementation that can deal with
+ * multiple background initialization tasks.
+ * </p>
+ * <p>
+ * This class has a similar purpose as {@link BackgroundInitializer}. However,
+ * it is not limited to a single background initialization task. Rather it
+ * manages an arbitrary number of {@code BackgroundInitializer} objects,
+ * executes them, and waits until they are completely initialized. This is
+ * useful for applications that have to perform multiple initialization tasks
+ * that can run in parallel (i.e. that do not depend on each other). This class
+ * takes care about the management of an {@code ExecutorService} and shares it
+ * with the {@code BackgroundInitializer} objects it is responsible for; so the
+ * using application need not bother with these details.
+ * </p>
+ * <p>
+ * The typical usage scenario for {@code MultiBackgroundInitializer} is as
+ * follows:
+ * </p>
+ * <ul>
+ * <li>Create a new instance of the class. Optionally pass in a pre-configured
+ * {@code ExecutorService}. Alternatively {@code MultiBackgroundInitializer} can
+ * create a temporary {@code ExecutorService} and delete it after initialization
+ * is complete.</li>
+ * <li>Create specialized {@link BackgroundInitializer} objects for the
+ * initialization tasks to be performed and add them to the {@code
+ * MultiBackgroundInitializer} using the
+ * {@link #addInitializer(String, BackgroundInitializer)} method.</li>
+ * <li>After all initializers have been added, call the {@link #start()} method.
+ * </li>
+ * <li>When access to the result objects produced by the {@code
+ * BackgroundInitializer} objects is needed call the {@link #get()} method. The
+ * object returned here provides access to all result objects created during
+ * initialization. It also stores information about exceptions that have
+ * occurred.</li>
+ * </ul>
+ * <p>
+ * {@code MultiBackgroundInitializer} starts a special controller task that
+ * starts all {@code BackgroundInitializer} objects added to the instance.
+ * Before the an initializer is started it is checked whether this initializer
+ * already has an {@code ExecutorService} set. If this is the case, this {@code
+ * ExecutorService} is used for running the background task. Otherwise the
+ * current {@code ExecutorService} of this {@code MultiBackgroundInitializer} is
+ * shared with the initializer.
+ * </p>
+ * <p>
+ * The easiest way of using this class is to let it deal with the management of
+ * an {@code ExecutorService} itself: If no external {@code ExecutorService} is
+ * provided, the class creates a temporary {@code ExecutorService} (that is
+ * capable of executing all background tasks in parallel) and destroys it at the
+ * end of background processing.
+ * </p>
+ * <p>
+ * Alternatively an external {@code ExecutorService} can be provided - either at
+ * construction time or later by calling the
+ * {@link #setExternalExecutor(ExecutorService)} method. In this case all
+ * background tasks are scheduled at this external {@code ExecutorService}.
+ * <strong>Important note:</strong> When using an external {@code
+ * ExecutorService} be sure that the number of threads managed by the service is
+ * large enough. Otherwise a deadlock can happen! This is the case in the
+ * following scenario: {@code MultiBackgroundInitializer} starts a task that
+ * starts all registered {@code BackgroundInitializer} objects and waits for
+ * their completion. If for instance a single threaded {@code ExecutorService}
+ * is used, none of the background tasks can be executed, and the task created
+ * by {@code MultiBackgroundInitializer} waits forever.
+ * </p>
+ *
+ * @since 3.0
+ */
+public class MultiBackgroundInitializer
+        extends
+        BackgroundInitializer<MultiBackgroundInitializer.MultiBackgroundInitializerResults> {
+    /** A map with the child initializers. */
+    private final Map<String, BackgroundInitializer<?>> childInitializers =
+        new HashMap<String, BackgroundInitializer<?>>();
+
+    /**
+     * Creates a new instance of {@code MultiBackgroundInitializer}.
+     */
+    public MultiBackgroundInitializer() {
+        super();
+    }
+
+    /**
+     * Creates a new instance of {@code MultiBackgroundInitializer} and
+     * initializes it with the given external {@code ExecutorService}.
+     *
+     * @param exec the {@code ExecutorService} for executing the background
+     * tasks
+     */
+    public MultiBackgroundInitializer(final ExecutorService exec) {
+        super(exec);
+    }
+
+    /**
+     * Adds a new {@code BackgroundInitializer} to this object. When this
+     * {@code MultiBackgroundInitializer} is started, the given initializer will
+     * be processed. This method must not be called after {@link #start()} has
+     * been invoked.
+     *
+     * @param name the name of the initializer (must not be <b>null</b>)
+     * @param init the {@code BackgroundInitializer} to add (must not be
+     * <b>null</b>)
+     * @throws IllegalArgumentException if a required parameter is missing
+     * @throws IllegalStateException if {@code start()} has already been called
+     */
+    public void addInitializer(final String name, final BackgroundInitializer<?> init) {
+        if (name == null) {
+            throw new IllegalArgumentException(
+                    "Name of child initializer must not be null!");
+        }
+        if (init == null) {
+            throw new IllegalArgumentException(
+                    "Child initializer must not be null!");
+        }
+
+        synchronized (this) {
+            if (isStarted()) {
+                throw new IllegalStateException(
+                        "addInitializer() must not be called after start()!");
+            }
+            childInitializers.put(name, init);
+        }
+    }
+
+    /**
+     * Returns the number of tasks needed for executing all child {@code
+     * BackgroundInitializer} objects in parallel. This implementation sums up
+     * the required tasks for all child initializers (which is necessary if one
+     * of the child initializers is itself a {@code MultiBackgroundInitializer}
+     * ). Then it adds 1 for the control task that waits for the completion of
+     * the children.
+     *
+     * @return the number of tasks required for background processing
+     */
+    @Override
+    protected int getTaskCount() {
+        int result = 1;
+
+        for (final BackgroundInitializer<?> bi : childInitializers.values()) {
+            result += bi.getTaskCount();
+        }
+
+        return result;
+    }
+
+    /**
+     * Creates the results object. This implementation starts all child {@code
+     * BackgroundInitializer} objects. Then it collects their results and
+     * creates a {@code MultiBackgroundInitializerResults} object with this
+     * data. If a child initializer throws a checked exceptions, it is added to
+     * the results object. Unchecked exceptions are propagated.
+     *
+     * @return the results object
+     * @throws Exception if an error occurs
+     */
+    @Override
+    protected MultiBackgroundInitializerResults initialize() throws Exception {
+        Map<String, BackgroundInitializer<?>> inits;
+        synchronized (this) {
+            // create a snapshot to operate on
+            inits = new HashMap<String, BackgroundInitializer<?>>(
+                    childInitializers);
+        }
+
+        // start the child initializers
+        final ExecutorService exec = getActiveExecutor();
+        for (final BackgroundInitializer<?> bi : inits.values()) {
+            if (bi.getExternalExecutor() == null) {
+                // share the executor service if necessary
+                bi.setExternalExecutor(exec);
+            }
+            bi.start();
+        }
+
+        // collect the results
+        final Map<String, Object> results = new HashMap<String, Object>();
+        final Map<String, ConcurrentException> excepts = new HashMap<String, ConcurrentException>();
+        for (final Map.Entry<String, BackgroundInitializer<?>> e : inits.entrySet()) {
+            try {
+                results.put(e.getKey(), e.getValue().get());
+            } catch (final ConcurrentException cex) {
+                excepts.put(e.getKey(), cex);
+            }
+        }
+
+        return new MultiBackgroundInitializerResults(inits, results, excepts);
+    }
+
+    /**
+     * A data class for storing the results of the background initialization
+     * performed by {@code MultiBackgroundInitializer}. Objects of this inner
+     * class are returned by {@link MultiBackgroundInitializer#initialize()}.
+     * They allow access to all result objects produced by the
+     * {@link BackgroundInitializer} objects managed by the owning instance. It
+     * is also possible to retrieve status information about single
+     * {@link BackgroundInitializer}s, i.e. whether they completed normally or
+     * caused an exception.
+     */
+    public static class MultiBackgroundInitializerResults {
+        /** A map with the child initializers. */
+        private final Map<String, BackgroundInitializer<?>> initializers;
+
+        /** A map with the result objects. */
+        private final Map<String, Object> resultObjects;
+
+        /** A map with the exceptions. */
+        private final Map<String, ConcurrentException> exceptions;
+
+        /**
+         * Creates a new instance of {@code MultiBackgroundInitializerResults}
+         * and initializes it with maps for the {@code BackgroundInitializer}
+         * objects, their result objects and the exceptions thrown by them.
+         *
+         * @param inits the {@code BackgroundInitializer} objects
+         * @param results the result objects
+         * @param excepts the exceptions
+         */
+        private MultiBackgroundInitializerResults(
+                final Map<String, BackgroundInitializer<?>> inits,
+                final Map<String, Object> results,
+                final Map<String, ConcurrentException> excepts) {
+            initializers = inits;
+            resultObjects = results;
+            exceptions = excepts;
+        }
+
+        /**
+         * Returns the {@code BackgroundInitializer} with the given name. If the
+         * name cannot be resolved, an exception is thrown.
+         *
+         * @param name the name of the {@code BackgroundInitializer}
+         * @return the {@code BackgroundInitializer} with this name
+         * @throws NoSuchElementException if the name cannot be resolved
+         */
+        public BackgroundInitializer<?> getInitializer(final String name) {
+            return checkName(name);
+        }
+
+        /**
+         * Returns the result object produced by the {@code
+         * BackgroundInitializer} with the given name. This is the object
+         * returned by the initializer's {@code initialize()} method. If this
+         * {@code BackgroundInitializer} caused an exception, <b>null</b> is
+         * returned. If the name cannot be resolved, an exception is thrown.
+         *
+         * @param name the name of the {@code BackgroundInitializer}
+         * @return the result object produced by this {@code
+         * BackgroundInitializer}
+         * @throws NoSuchElementException if the name cannot be resolved
+         */
+        public Object getResultObject(final String name) {
+            checkName(name);
+            return resultObjects.get(name);
+        }
+
+        /**
+         * Returns a flag whether the {@code BackgroundInitializer} with the
+         * given name caused an exception.
+         *
+         * @param name the name of the {@code BackgroundInitializer}
+         * @return a flag whether this initializer caused an exception
+         * @throws NoSuchElementException if the name cannot be resolved
+         */
+        public boolean isException(final String name) {
+            checkName(name);
+            return exceptions.containsKey(name);
+        }
+
+        /**
+         * Returns the {@code ConcurrentException} object that was thrown by the
+         * {@code BackgroundInitializer} with the given name. If this
+         * initializer did not throw an exception, the return value is
+         * <b>null</b>. If the name cannot be resolved, an exception is thrown.
+         *
+         * @param name the name of the {@code BackgroundInitializer}
+         * @return the exception thrown by this initializer
+         * @throws NoSuchElementException if the name cannot be resolved
+         */
+        public ConcurrentException getException(final String name) {
+            checkName(name);
+            return exceptions.get(name);
+        }
+
+        /**
+         * Returns a set with the names of all {@code BackgroundInitializer}
+         * objects managed by the {@code MultiBackgroundInitializer}.
+         *
+         * @return an (unmodifiable) set with the names of the managed {@code
+         * BackgroundInitializer} objects
+         */
+        public Set<String> initializerNames() {
+            return Collections.unmodifiableSet(initializers.keySet());
+        }
+
+        /**
+         * Returns a flag whether the whole initialization was successful. This
+         * is the case if no child initializer has thrown an exception.
+         *
+         * @return a flag whether the initialization was successful
+         */
+        public boolean isSuccessful() {
+            return exceptions.isEmpty();
+        }
+
+        /**
+         * Checks whether an initializer with the given name exists. If not,
+         * throws an exception. If it exists, the associated child initializer
+         * is returned.
+         *
+         * @param name the name to check
+         * @return the initializer with this name
+         * @throws NoSuchElementException if the name is unknown
+         */
+/**
+ * Checks whether an initializer with the given name exists. If not,
+ * throws an exception. If it exists, the associated child initializer
+ * is returned.
+ *
+ * @param name
+ * 		the name to check
+ * @return the initializer with this name
+ * @throws NoSuchElementException
+ * 		if the name is unknown
+ */
+private org.apache.commons.lang3.concurrent.BackgroundInitializer<?> checkName(final java.lang.String name) {
+    final org.apache.commons.lang3.concurrent.BackgroundInitializer<?> init = initializers.get(name);
+    {
+        return /* NPEX_NULL_EXP */
+        init;
+    }
+}
+    }
+}
diff --git a/Java/commons-lang-MultiBackgroundInitializer_343/metadata.json b/Java/commons-lang-MultiBackgroundInitializer_343/metadata.json
new file mode 100644
index 000000000..9fa528939
--- /dev/null
+++ b/Java/commons-lang-MultiBackgroundInitializer_343/metadata.json
@@ -0,0 +1,21 @@
+{
+  "language": "java",
+  "id": "commons-lang-MultiBackgroundInitializer_343",
+  "buggyPath": ".",
+  "referencePath": null,
+  "buildCommand": "mvn package -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100 -DskipTests=true -DskipITs=true -Dtest=None -DfailIfNoTests=false",
+  "testCommand": "mvn test -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100",
+  "categories": [
+    "safety",
+    "npe"
+  ],
+  "npe": {
+    "filepath": "src/main/java/org/apache/commons/lang3/concurrent/MultiBackgroundInitializer.java",
+    "line": 356,
+    "npe_method": "checkName",
+    "deref_field": "init",
+    "npe_class": "MultiBackgroundInitializerResults",
+    "repo": "commons-lang",
+    "bug_id": "MultiBackgroundInitializer_343"
+  }
+}
diff --git a/Java/commons-lang-MultiBackgroundInitializer_343/npe.json b/Java/commons-lang-MultiBackgroundInitializer_343/npe.json
new file mode 100644
index 000000000..591dd4495
--- /dev/null
+++ b/Java/commons-lang-MultiBackgroundInitializer_343/npe.json
@@ -0,0 +1,7 @@
+{
+    "filepath": "src/main/java/org/apache/commons/lang3/concurrent/MultiBackgroundInitializer.java",
+    "line": 356,
+    "npe_method": "checkName",
+    "deref_field": "init",
+    "npe_class": "MultiBackgroundInitializerResults"
+}
\ No newline at end of file
diff --git a/Java/commons-lang-MutableObject_113/Dockerfile b/Java/commons-lang-MutableObject_113/Dockerfile
new file mode 100644
index 000000000..7b7fbe349
--- /dev/null
+++ b/Java/commons-lang-MutableObject_113/Dockerfile
@@ -0,0 +1,18 @@
+FROM ghcr.io/kupl/starlab-benchmarks/java-base:commons-lang
+
+ENV TZ=Asia/Seoul
+
+COPY ./metadata.json .
+COPY ./npe.json .
+COPY ./buggy.java /tmp/buggy.java
+RUN export BUGGY_PATH=$(cat metadata.json | jq -r ".npe.filepath") \
+    && export BUGGY_LINE=$(cat metadata.json | jq -r ".npe.line") \
+    && export BUGGY_MTHD=$(cat metadata.json | jq -r ".npe.npe_method") \
+    && mv /tmp/buggy.java $BUGGY_PATH \
+    && echo "[{\"filepath\": \"$BUGGY_PATH\", \"line\": $BUGGY_LINE, \"method_name\": \"$BUGGY_MTHD\"}]" | jq . > traces.json
+
+RUN git init . && git add -A
+
+RUN $(cat metadata.json | jq -r ".buildCommand")
+
+RUN $(cat metadata.json | jq -r ".testCommand"); if [ $? -eq 0 ]; then exit 1; fi
diff --git a/Java/commons-lang-MutableObject_113/buggy.java b/Java/commons-lang-MutableObject_113/buggy.java
new file mode 100644
index 000000000..00931cb3c
--- /dev/null
+++ b/Java/commons-lang-MutableObject_113/buggy.java
@@ -0,0 +1,133 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.lang3.mutable;
+
+import java.io.Serializable;
+
+/**
+ * A mutable <code>Object</code> wrapper.
+ * 
+ * @param <T> the type to set and get 
+ * @since 2.1
+ */
+public class MutableObject<T> implements Mutable<T>, Serializable {
+
+    /**
+     * Required for serialization support.
+     * 
+     * @see java.io.Serializable
+     */
+    private static final long serialVersionUID = 86241875189L;
+
+    /** The mutable value. */
+    private T value;
+
+    /**
+     * Constructs a new MutableObject with the default value of <code>null</code>.
+     */
+    public MutableObject() {
+        super();
+    }
+
+    /**
+     * Constructs a new MutableObject with the specified value.
+     * 
+     * @param value  the initial value to store
+     */
+    public MutableObject(final T value) {
+        super();
+        this.value = value;
+    }
+
+    //-----------------------------------------------------------------------
+    /**
+     * Gets the value.
+     * 
+     * @return the value, may be null
+     */
+    @Override
+    public T getValue() {
+        return this.value;
+    }
+
+    /**
+     * Sets the value.
+     * 
+     * @param value  the value to set
+     */
+    @Override
+    public void setValue(final T value) {
+        this.value = value;
+    }
+
+    //-----------------------------------------------------------------------
+    /**
+     * <p>
+     * Compares this object against the specified object. The result is <code>true</code> if and only if the argument
+     * is not <code>null</code> and is a <code>MutableObject</code> object that contains the same <code>T</code>
+     * value as this object.
+     * </p>
+     * 
+     * @param obj  the object to compare with, <code>null</code> returns <code>false</code>
+     * @return  <code>true</code> if the objects are the same;
+     *          <code>true</code> if the objects have equivalent <code>value</code> fields;
+     *          <code>false</code> otherwise.
+     */
+    @Override
+    public boolean equals(final Object obj) {
+        if (obj == null) {
+            return false;
+        }
+        if (this == obj) {
+            return true;
+        }
+        if (this.getClass() == obj.getClass()) {
+            final MutableObject<?> that = (MutableObject<?>) obj;
+            return this.value.equals(that.value);
+        }
+        return false;
+    }
+
+    /**
+     * Returns the value's hash code or <code>0</code> if the value is <code>null</code>.
+     * 
+     * @return the value's hash code or <code>0</code> if the value is <code>null</code>.
+     */
+    @Override
+/**
+ * Returns the value's hash code or <code>0</code> if the value is <code>null</code>.
+ *
+ * @return the value's hash code or <code>0</code> if the value is <code>null</code>.
+ */
+public int hashCode() {
+    return /* NPEX_NULL_EXP */
+    value.hashCode();
+}
+
+    //-----------------------------------------------------------------------
+    /**
+     * Returns the String value of this mutable.
+     * 
+     * @return the mutable value as a string
+     */
+    @Override
+    public String toString() {
+        return value == null ? "null" : value.toString();
+    }
+
+}
diff --git a/Java/commons-lang-MutableObject_113/metadata.json b/Java/commons-lang-MutableObject_113/metadata.json
new file mode 100644
index 000000000..da8e77d25
--- /dev/null
+++ b/Java/commons-lang-MutableObject_113/metadata.json
@@ -0,0 +1,21 @@
+{
+  "language": "java",
+  "id": "commons-lang-MutableObject_113",
+  "buggyPath": ".",
+  "referencePath": null,
+  "buildCommand": "mvn package -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100 -DskipTests=true -DskipITs=true -Dtest=None -DfailIfNoTests=false",
+  "testCommand": "mvn test -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100",
+  "categories": [
+    "safety",
+    "npe"
+  ],
+  "npe": {
+    "filepath": "src/main/java/org/apache/commons/lang3/mutable/MutableObject.java",
+    "line": 119,
+    "npe_method": "hashCode",
+    "deref_field": "value",
+    "npe_class": "MutableObject",
+    "repo": "commons-lang",
+    "bug_id": "MutableObject_113"
+  }
+}
diff --git a/Java/commons-lang-MutableObject_113/npe.json b/Java/commons-lang-MutableObject_113/npe.json
new file mode 100644
index 000000000..262daf277
--- /dev/null
+++ b/Java/commons-lang-MutableObject_113/npe.json
@@ -0,0 +1,7 @@
+{
+    "filepath": "src/main/java/org/apache/commons/lang3/mutable/MutableObject.java",
+    "line": 119,
+    "npe_method": "hashCode",
+    "deref_field": "value",
+    "npe_class": "MutableObject"
+}
\ No newline at end of file
diff --git a/Java/commons-lang-MutableObject_124/Dockerfile b/Java/commons-lang-MutableObject_124/Dockerfile
new file mode 100644
index 000000000..7b7fbe349
--- /dev/null
+++ b/Java/commons-lang-MutableObject_124/Dockerfile
@@ -0,0 +1,18 @@
+FROM ghcr.io/kupl/starlab-benchmarks/java-base:commons-lang
+
+ENV TZ=Asia/Seoul
+
+COPY ./metadata.json .
+COPY ./npe.json .
+COPY ./buggy.java /tmp/buggy.java
+RUN export BUGGY_PATH=$(cat metadata.json | jq -r ".npe.filepath") \
+    && export BUGGY_LINE=$(cat metadata.json | jq -r ".npe.line") \
+    && export BUGGY_MTHD=$(cat metadata.json | jq -r ".npe.npe_method") \
+    && mv /tmp/buggy.java $BUGGY_PATH \
+    && echo "[{\"filepath\": \"$BUGGY_PATH\", \"line\": $BUGGY_LINE, \"method_name\": \"$BUGGY_MTHD\"}]" | jq . > traces.json
+
+RUN git init . && git add -A
+
+RUN $(cat metadata.json | jq -r ".buildCommand")
+
+RUN $(cat metadata.json | jq -r ".testCommand"); if [ $? -eq 0 ]; then exit 1; fi
diff --git a/Java/commons-lang-MutableObject_124/buggy.java b/Java/commons-lang-MutableObject_124/buggy.java
new file mode 100644
index 000000000..1208ad33a
--- /dev/null
+++ b/Java/commons-lang-MutableObject_124/buggy.java
@@ -0,0 +1,134 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.lang3.mutable;
+
+import java.io.Serializable;
+
+/**
+ * A mutable <code>Object</code> wrapper.
+ * 
+ * @param <T> the type to set and get 
+ * @since 2.1
+ */
+public class MutableObject<T> implements Mutable<T>, Serializable {
+
+    /**
+     * Required for serialization support.
+     * 
+     * @see java.io.Serializable
+     */
+    private static final long serialVersionUID = 86241875189L;
+
+    /** The mutable value. */
+    private T value;
+
+    /**
+     * Constructs a new MutableObject with the default value of <code>null</code>.
+     */
+    public MutableObject() {
+        super();
+    }
+
+    /**
+     * Constructs a new MutableObject with the specified value.
+     * 
+     * @param value  the initial value to store
+     */
+    public MutableObject(final T value) {
+        super();
+        this.value = value;
+    }
+
+    //-----------------------------------------------------------------------
+    /**
+     * Gets the value.
+     * 
+     * @return the value, may be null
+     */
+    @Override
+    public T getValue() {
+        return this.value;
+    }
+
+    /**
+     * Sets the value.
+     * 
+     * @param value  the value to set
+     */
+    @Override
+    public void setValue(final T value) {
+        this.value = value;
+    }
+
+    //-----------------------------------------------------------------------
+    /**
+     * <p>
+     * Compares this object against the specified object. The result is <code>true</code> if and only if the argument
+     * is not <code>null</code> and is a <code>MutableObject</code> object that contains the same <code>T</code>
+     * value as this object.
+     * </p>
+     * 
+     * @param obj  the object to compare with, <code>null</code> returns <code>false</code>
+     * @return  <code>true</code> if the objects are the same;
+     *          <code>true</code> if the objects have equivalent <code>value</code> fields;
+     *          <code>false</code> otherwise.
+     */
+    @Override
+    public boolean equals(final Object obj) {
+        if (obj == null) {
+            return false;
+        }
+        if (this == obj) {
+            return true;
+        }
+        if (this.getClass() == obj.getClass()) {
+            final MutableObject<?> that = (MutableObject<?>) obj;
+            return this.value.equals(that.value);
+        }
+        return false;
+    }
+
+    /**
+     * Returns the value's hash code or <code>0</code> if the value is <code>null</code>.
+     * 
+     * @return the value's hash code or <code>0</code> if the value is <code>null</code>.
+     */
+    @Override
+    public int hashCode() {
+        return value == null ? 0 : value.hashCode();
+    }
+
+    //-----------------------------------------------------------------------
+    /**
+     * Returns the String value of this mutable.
+     * 
+     * @return the mutable value as a string
+     */
+    @Override
+// -----------------------------------------------------------------------
+/**
+ * Returns the String value of this mutable.
+ *
+ * @return the mutable value as a string
+ */
+public java.lang.String toString() {
+    return /* NPEX_NULL_EXP */
+    value.toString();
+}
+
+}
diff --git a/Java/commons-lang-MutableObject_124/metadata.json b/Java/commons-lang-MutableObject_124/metadata.json
new file mode 100644
index 000000000..8a982200a
--- /dev/null
+++ b/Java/commons-lang-MutableObject_124/metadata.json
@@ -0,0 +1,21 @@
+{
+  "language": "java",
+  "id": "commons-lang-MutableObject_124",
+  "buggyPath": ".",
+  "referencePath": null,
+  "buildCommand": "mvn package -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100 -DskipTests=true -DskipITs=true -Dtest=None -DfailIfNoTests=false",
+  "testCommand": "mvn test -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100",
+  "categories": [
+    "safety",
+    "npe"
+  ],
+  "npe": {
+    "filepath": "src/main/java/org/apache/commons/lang3/mutable/MutableObject.java",
+    "line": 131,
+    "npe_method": "toString",
+    "deref_field": "value",
+    "npe_class": "MutableObject",
+    "repo": "commons-lang",
+    "bug_id": "MutableObject_124"
+  }
+}
diff --git a/Java/commons-lang-MutableObject_124/npe.json b/Java/commons-lang-MutableObject_124/npe.json
new file mode 100644
index 000000000..c9ad38fca
--- /dev/null
+++ b/Java/commons-lang-MutableObject_124/npe.json
@@ -0,0 +1,7 @@
+{
+    "filepath": "src/main/java/org/apache/commons/lang3/mutable/MutableObject.java",
+    "line": 131,
+    "npe_method": "toString",
+    "deref_field": "value",
+    "npe_class": "MutableObject"
+}
\ No newline at end of file
diff --git a/Java/commons-lang-MutableObject_93/Dockerfile b/Java/commons-lang-MutableObject_93/Dockerfile
new file mode 100644
index 000000000..7b7fbe349
--- /dev/null
+++ b/Java/commons-lang-MutableObject_93/Dockerfile
@@ -0,0 +1,18 @@
+FROM ghcr.io/kupl/starlab-benchmarks/java-base:commons-lang
+
+ENV TZ=Asia/Seoul
+
+COPY ./metadata.json .
+COPY ./npe.json .
+COPY ./buggy.java /tmp/buggy.java
+RUN export BUGGY_PATH=$(cat metadata.json | jq -r ".npe.filepath") \
+    && export BUGGY_LINE=$(cat metadata.json | jq -r ".npe.line") \
+    && export BUGGY_MTHD=$(cat metadata.json | jq -r ".npe.npe_method") \
+    && mv /tmp/buggy.java $BUGGY_PATH \
+    && echo "[{\"filepath\": \"$BUGGY_PATH\", \"line\": $BUGGY_LINE, \"method_name\": \"$BUGGY_MTHD\"}]" | jq . > traces.json
+
+RUN git init . && git add -A
+
+RUN $(cat metadata.json | jq -r ".buildCommand")
+
+RUN $(cat metadata.json | jq -r ".testCommand"); if [ $? -eq 0 ]; then exit 1; fi
diff --git a/Java/commons-lang-MutableObject_93/buggy.java b/Java/commons-lang-MutableObject_93/buggy.java
new file mode 100644
index 000000000..fa6e002ea
--- /dev/null
+++ b/Java/commons-lang-MutableObject_93/buggy.java
@@ -0,0 +1,141 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.lang3.mutable;
+
+import java.io.Serializable;
+
+/**
+ * A mutable <code>Object</code> wrapper.
+ * 
+ * @param <T> the type to set and get 
+ * @since 2.1
+ */
+public class MutableObject<T> implements Mutable<T>, Serializable {
+
+    /**
+     * Required for serialization support.
+     * 
+     * @see java.io.Serializable
+     */
+    private static final long serialVersionUID = 86241875189L;
+
+    /** The mutable value. */
+    private T value;
+
+    /**
+     * Constructs a new MutableObject with the default value of <code>null</code>.
+     */
+    public MutableObject() {
+        super();
+    }
+
+    /**
+     * Constructs a new MutableObject with the specified value.
+     * 
+     * @param value  the initial value to store
+     */
+    public MutableObject(final T value) {
+        super();
+        this.value = value;
+    }
+
+    //-----------------------------------------------------------------------
+    /**
+     * Gets the value.
+     * 
+     * @return the value, may be null
+     */
+    @Override
+    public T getValue() {
+        return this.value;
+    }
+
+    /**
+     * Sets the value.
+     * 
+     * @param value  the value to set
+     */
+    @Override
+    public void setValue(final T value) {
+        this.value = value;
+    }
+
+    //-----------------------------------------------------------------------
+    /**
+     * <p>
+     * Compares this object against the specified object. The result is <code>true</code> if and only if the argument
+     * is not <code>null</code> and is a <code>MutableObject</code> object that contains the same <code>T</code>
+     * value as this object.
+     * </p>
+     * 
+     * @param obj  the object to compare with, <code>null</code> returns <code>false</code>
+     * @return  <code>true</code> if the objects are the same;
+     *          <code>true</code> if the objects have equivalent <code>value</code> fields;
+     *          <code>false</code> otherwise.
+     */
+    @Override
+// -----------------------------------------------------------------------
+/**
+ * <p>
+ * Compares this object against the specified object. The result is <code>true</code> if and only if the argument
+ * is not <code>null</code> and is a <code>MutableObject</code> object that contains the same <code>T</code>
+ * value as this object.
+ * </p>
+ *
+ * @param obj
+ * 		the object to compare with, <code>null</code> returns <code>false</code>
+ * @return <code>true</code> if the objects are the same;
+<code>true</code> if the objects have equivalent <code>value</code> fields;
+<code>false</code> otherwise.
+ */
+public boolean equals(final java.lang.Object obj) {
+    {
+        if (this == /* NPEX_NULL_EXP */
+        obj) {
+            return true;
+        }
+        if (this.getClass() == obj.getClass()) {
+            final org.apache.commons.lang3.mutable.MutableObject<?> that = ((org.apache.commons.lang3.mutable.MutableObject<?>) (obj));
+            return this.value.equals(that.value);
+        }
+        return false;
+    }
+}
+
+    /**
+     * Returns the value's hash code or <code>0</code> if the value is <code>null</code>.
+     * 
+     * @return the value's hash code or <code>0</code> if the value is <code>null</code>.
+     */
+    @Override
+    public int hashCode() {
+        return value == null ? 0 : value.hashCode();
+    }
+
+    //-----------------------------------------------------------------------
+    /**
+     * Returns the String value of this mutable.
+     * 
+     * @return the mutable value as a string
+     */
+    @Override
+    public String toString() {
+        return value == null ? "null" : value.toString();
+    }
+
+}
diff --git a/Java/commons-lang-MutableObject_93/metadata.json b/Java/commons-lang-MutableObject_93/metadata.json
new file mode 100644
index 000000000..636bbfc2e
--- /dev/null
+++ b/Java/commons-lang-MutableObject_93/metadata.json
@@ -0,0 +1,21 @@
+{
+  "language": "java",
+  "id": "commons-lang-MutableObject_93",
+  "buggyPath": ".",
+  "referencePath": null,
+  "buildCommand": "mvn package -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100 -DskipTests=true -DskipITs=true -Dtest=None -DfailIfNoTests=false",
+  "testCommand": "mvn test -V -B -Denforcer.skip=true -Dcheckstyle.skip=true -Dcobertura.skip=true -Drat.skip=true -Dlicense.skip=true -Dfindbugs.skip=true -Dgpg.skip=true -Dskip.npm=true -Dskip.gulp=true -Dskip.bower=true -Drat.numUnapprovedLicenses=100",
+  "categories": [
+    "safety",
+    "npe"
+  ],
+  "npe": {
+    "filepath": "src/main/java/org/apache/commons/lang3/mutable/MutableObject.java",
+    "line": 109,
+    "npe_method": "equals",
+    "deref_field": "obj",
+    "npe_class": "MutableObject",
+    "repo": "commons-lang",
+    "bug_id": "MutableObject_93"
+  }
+}
diff --git a/Java/commons-lang-MutableObject_93/npe.json b/Java/commons-lang-MutableObject_93/npe.json
new file mode 100644
index 000000000..78b77a760
--- /dev/null
+++ b/Java/commons-lang-MutableObject_93/npe.json
@@ -0,0 +1,7 @@
+{
+    "filepath": "src/main/java/org/apache/commons/lang3/mutable/MutableObject.java",
+    "line": 109,
+    "npe_method": "equals",
+    "deref_field": "obj",
+    "npe_class": "MutableObject"
+}
\ No newline at end of file