Java(28) _二维数组

public class Break {
    public static void main(String[] args) {
        int[][] arr = new int[3][];
        arr[0] = new int[]{11, 12};
        arr[1] = new int[]{1, 2, 3};
        arr[2] = new int[]{9, 1, 1, 1, 12, 1};
        int sum = 0;
        for (int i = 0; i < arr.length; i++) { //行数
            int groupSum = 0;
            for (int j = 0; j < arr[i].length; j++) {
                groupSum += arr[i][j];
            }
            sum += groupSum;
            System.out.println("第"+(i+1)+"行的和为："+groupSum);
        }
           System.out.println("数组总和为："+sum);

    }
}