二维数组 创建数组 int[][] arr = new int [n][m]; int[][] brr = {{1, 2, 3, 4, 5}, {6, 7, 8, 9, 10}, {11, 12, 13, 14, 15}}; // 3 行 5 列 int[][] crr = {{1, 2, 3, 4, 5}, {6, 7, 8}, {9}}; // 也可以创建非矩形的数组