使用嵌套 For 循环初始化二维数组的值 [英] Initialize Values of 2D Array using Nested For Loops

问题描述

我正在尝试格式化如下数组:

I am trying to format an array that is the following:

[1] [2] [3] [4] [5]
[6] [7] [8] [9] [10]
[11] [12] [13] [14] [15]

如何使用嵌套的 for 循环初始化二维数组和值?

How could I initialize the two dimensional array and the values using nested for loops?

推荐答案

我觉得你对二维数组有一个误解.想想它们是包含数组的数组.

I think you have a misunderstanding of two dimensional arrays. Think of them beeing arrays containing arrays.

如果你真的想要这个:

[[1] [2] [3] [4] [5]
[6] [7] [8] [9] [10]
[11] [12] [13] [14] [15]]

你可以这样初始化:

int[][] array2d = new int[15][1]
for (int i = 0; i < array2d.length; i++) {
    array2d[i][0] = i + 1;
}

如果在 fatc，你真正想要的是:

If in fatc, what you really want is:

[[1, 2, 3, 4, 5]
[6, 7, 8, 9, 10]
[11, 12, 13, 14, 15]]

你可以使用:

int[][] array2d = new int[3][5]
for (int i = 0; i < array2d.length; i++) {
    for (int j = 0; j < array2d[0].length; j++) {
        array2d[i][j] = (i * array2d[0].length) + j + 1;
    }
}

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