java求一个二维数组元素之和

用java实现求一个二维数组元素之和：

代码如下：

package hycode.basic;

public class ArraySum {
    public static void main(String[] args) {
        int[][] array = new int[3][4];
        for (int i = 0; i < array.length; i++) {
            for (int j = 0; j < array[i].length; j++) {
                array[i][j] = (int) (Math.random() * 100);
            }
        }
        for (int i = 0; i < array.length; i++) {
            for (int j = 0; j < array[i].length; j++)
                System.out.print(array[i][j] + "  ");
            System.out.println();
        }
        int sum = 0;
        for (int i = 0; i < array.length; i++) {
            for (int j = 0; j < array[i].length; j++) {
                sum += array[i][j];
            }
        }
        System.out.println("The sum is:"+sum);
    }
}