ArrayUtil

public class ArrayUtil {

    public static void originalArray(){
        int [] arr = {2,7,5,1,0};

          for (int i = 0; i < arr.length; i++) {
              System.out.println("pre arr Index" + i + ":" + arr[i]);
            }

          int [] arr2 = new int[arr.length];
          int j = 0;
          for (int i = arr.length - 1; i>=0; i--) {
              arr2[j] = arr[i];
              j++;
          }
          int m = 0;
          for (int k = 0; k < arr.length; k++) {
            arr[m] = arr2[k];
            m++;
          }
          for (int i = 0; i < arr.length; i++) {
            System.out.println("arr Index" + i + ":" + arr[i]);
          }
          for (int i = 0; i < arr2.length; i++) {
              System.out.println("arr2 Index" + i + ":" + arr2[i]);
            }
    }

    public static void reverseArray(int[] arr) {

          int [] arr2 = new int[arr.length];
          int j = 0;
          for (int i = arr.length - 1; i>=0; i--) {
              arr2[j] = arr[i];
              j++;}

          int m = 0;
          for (int k = 0; k < arr.length; k++) {
            arr[m] = arr2[k];
            m++;}

    }

    public static void printArray(int[] arr)
    {

        for(int i = 0; i < arr.length; i++)
        {
            System.out.print(arr[i] + " ");
        }

    }

}