nested for loop in java

/**
 * @author lautturi.com 
 * Java example: nested for loop in java
 */

import java.util.*;

public class Lautturi {
	public static void main(String args[]) {
		 for (int i = 0; i < 3; i++) {
	            for (int j = 0; j < 4; j++) {
	                System.out.println(i+" "+j);
	            }
	            System.out.println();
	        }
	}
}

output:

0 0
0 1
0 2
0 3

1 0
1 1
1 2
1 3

2 0
2 1
2 2
2 3