Add a Peek method to queues

Laifsyn · Jun 29, 2024 · 3d62ff4 · 3d62ff4
1 parent 9afa650
commit 3d62ff4
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Showing 3 changed files with 19 additions and 0 deletions.
diff --git a/src/main/java/com/utp/clsEstructuraDatos/Estructuras/colas/IQueue.java b/src/main/java/com/utp/clsEstructuraDatos/Estructuras/colas/IQueue.java
@@ -11,6 +11,8 @@ default boolean isEmpty() {
 
     T remove();
 
+    T peek();
+
     int len();
 
     void clear();

diff --git a/src/main/java/com/utp/clsEstructuraDatos/Estructuras/linked_list/LEColaCircular.java b/src/main/java/com/utp/clsEstructuraDatos/Estructuras/linked_list/LEColaCircular.java
@@ -19,4 +19,13 @@ public T remove() {
         return inner.remove_first().get();
     }
 
+    @Override
+    public T peek() {
+        var e = inner.get(0);
+        if (e.isPresent()) {
+            return e.get();
+        }
+        return null;
+    }
+
 }
diff --git a/src/main/java/com/utp/clsEstructuraDatos/Estructuras/linked_list/LEColaLineal.java b/src/main/java/com/utp/clsEstructuraDatos/Estructuras/linked_list/LEColaLineal.java
@@ -21,4 +21,12 @@ public T remove() {
         return inner.remove_first().get();
     }
 
+    @Override
+    public T peek() {
+        var e = inner.get(0);
+        if (e.isPresent()) {
+            return e.get();
+        }
+        return null;
+    }
 }