Create Pattern31.java

Java/Pattern Questions/Pattern31.java

@@ -0,0 +1,16 @@
+public class Pattern31 {
+    public static void main(String[] args) {
+        pattern31(5);
+    }
+static void pattern31(int n) {
+        int originalN = n;
+        n = n * 2;
+        for (int row = 1; row < n; row++) {
+            for (int col = 1; col < n; col++) {
+                int atEveryIndex = originalN - Math.min(Math.min(row, col), Math.min(n - row, n - col));
+                System.out.print(atEveryIndex + 1 + "  ");
+            }
+            System.out.println();
+        }
+    }
+}