added ArrayManipulation.java

ArrayManipulation.java

@@ -0,0 +1,26 @@
+
+import java.util.Arrays;
+public class ArrayManipulation {
+  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 int[] removeLast(int[] arr) {
+    int[] lastRemoved = new int [arr.length - 1];
+    for (int i = 0; i < lastRemoved.length; i = i + 1) {
+      lastRemoved[i] = arr[i];
+    }
+    return lastRemoved;
+  }
+
+      
+  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)));
+    }
+  }