printing 2-dimensional array rows as columns in java

/**
 * @author lautturi.com 
 * Java example: how to print rows as columns in java 2d array
 */

import java.util.*;

public class Lautturi {

	public static void main(String[] args) {

		int arr[][] = { { 1, 2, 3, 4 }, { 5, 6, 7, 8, 15 }, { 9, 10, 11, 12 } };
		int maxlen = 0;
		for (int row = 0; row < arr.length; row++) {
			maxlen = arr[row].length>maxlen? arr[row].length:maxlen;
		}
		
		for (int col = 0; col < maxlen; col++) {
			for (int row = 0; row < arr.length; row++) {
				if(col<arr[row].length)
					System.out.printf("%5d", arr[row][col]);
				else
					System.out.printf("%5s","");
			}
			System.out.println();
		}

	}
}

output:

1    5    9
    2    6   10
    3    7   11
    4    8   12
        15