java二维数组的遍历

以下是Java二维数组的遍历的三种方法：

方法一：使用嵌套循环遍历

int[][] array = new int[3][];
array[0] = new int[]{0, 1, 2};
array[2] = new int[]{4, 5, 6, 7};

for (int i = 0; i < array.length; i++) {
    if (array[i] == null) {
        System.out.println("null" + " ");
        continue;
    }
    for (int j = 0; j < array[i].length; j++) {
        System.out.print(array[i][j] + " ");
    }
    System.out.println();
}

方法二：使用增强for循环遍历

int[][] array = new int[3][];
array[0] = new int[]{0, 1, 2};
array[2] = new int[]{4, 5, 6, 7};

for (int[] row : array) {
    if (row == null) {
        System.out.println("null" + " ");
        continue;
    }
    for (int num : row) {
        System.out.print(num + " ");
    }
    System.out.println();
}

方法三：使用Arrays类的deepToString方法

int[][] array = new int[3][];
array[0] = new int[]{0, 1, 2};
array[2] = new int[]{4, 5, 6, 7};

System.out.println(Arrays.deepToString(array));