how to sum a 2d array in java

/**
 * @author lautturi.com
 * Java example: Calculate the sum of elements in a 2d array
 */

import java.util.*;

public class Lautturi {

	public static void main(String[] args) {

		int array[][] = { {1,2,3,4},{5,6,7,8},{9,10,11,12} };
		int sum = 0 ;
		
		for (int[] subarray : array) {
			for (int i = 0; i < subarray.length; i++) {										  
		      sum = sum + subarray[i];
			}
		}
		
		System.out.println("sum:"+sum);
		
	}
}