added ArrayManipulation.java first time

ArrayManipulation.java

@@ -0,0 +1,33 @@
+import java.util.Arrays;
+
+public class ArrayManipulation {
+
+    public static int[] removeLast(int[] arr) {
+        if (arr == null || arr.length < 1) {
+            return arr;
+        }
+        int[] result = new int[arr.length-1];
+        for (int i = 0; i < result.length; i++) {
+            result[i] = arr[i];
+        }
+        return result;
+    }
+   
+    public static int[] reverseArray(int[] arr) {
+
+        for (int i = 0; i < arr.length/2; i++) {
+            int tmp = arr[i];
+            arr[i] = arr[arr.length - 1 - i];
+            arr[arr.length - 1 - i] = tmp;
+         }
+         return arr;
+
+    }    
+
+    public static void main(String[] args) {
+       
+        int[] arr = {1,2,3,4,5};
+        System.out.println(Arrays.toString(reverseArray(arr)));
+        System.out.println(Arrays.toString(removeLast(arr)));        
+    }
+}