Java Exercise for enhanced loop

public class arr {
arr() {
show();
}

private void show() {

int[] array = { 1, 2, 3, 4, 5 };
for (int i = 0; i <= 4; i++) {
System.out.print(array[i] + " ");
}
System.out.println("\n\n");
for (int elm : array) {
// elm++;
System.out.print(elm * elm + " ");
}

System.out.println("\n\n");
int[][] arr = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } };
for (int[] row : arr){
for (int element : row){
System.out.print(element+" ");
}
System.out.println();
}
}

}