for (int i : arr[]) {
    for (int j[] : i)
        System.out.print(j + " ");
    System.out.println();
}

for (int i[] : arr) {
    for (int j : i)
        System.out.print(j + " ");
    System.out.println();
}

for (int i[] : arr) {
    for (int j : i[])
        System.out.print(j + " ");
    System.out.println();
}

for (int i : arr) {
    for (int j : i)
        System.out.print(j + " ");
    System.out.println();
}