多维数组转置 [英] Multi-dimensional array transposing

问题描述

我有一个基于行的多维数组:

I have a row-based multidimensional array:

/** [row][column]. */
public int[][] tiles;

我想将此数组转换为基于列的数组，如下所示:

I would like to transform this array to column-based array, like following:

/** [column][row]. */
public int[][] tiles;

...但我真的不知道从哪里开始

...But I really don't know where to start

推荐答案

试试这个:

@Test
public void transpose() {
    final int[][] original = new int[][]{
            {1, 2, 3, 4},
            {5, 6, 7, 8},
            {9, 10, 11, 12}};

    for (int i = 0; i < original.length; i++) {
        for (int j = 0; j < original[i].length; j++) {
            System.out.print(original[i][j] + " ");
        }
        System.out.print("\n");
    }
    System.out.print("\n\n matrix transpose:\n");
    // transpose
    if (original.length > 0) {
        for (int i = 0; i < original[0].length; i++) {
            for (int j = 0; j < original.length; j++) {
                System.out.print(original[j][i] + " ");
            }
            System.out.print("\n");
        }
    }
}

输出:

1 2 3 4 
5 6 7 8 
9 10 11 12 


 matrix transpose:
1 5 9 
2 6 10 
3 7 11 
4 8 12 

这篇关于多维数组转置的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！