arr2.1

public class Main {

    public static void main(String[] args) {
       int a[] = new int[] {1, 2, 84, 4, 67, 6, 7, 12, 9, 10};

        for (int i = a.length - 1; i>= 0; i--)
            System.out.print(a[i]);
      }
    }