排序二维数组 [英] Sorting a 2 dimensional array

问题描述

我有一个二维数组，我想根据第一列的内容将其降序排列，但是我希望该数组保留每一行并在第一列移动时移动第二列.举一个例子；

I've got a 2D array that I'd like to sort into descending order depending on the contents of the first column, however I'd like the array to retain each row and move the second column as the first moves. To put it into an example;

[2, 5]
[4, 18]
[1, 7]
[9, 3]

将被分类为:

[9, 3]
[4, 18]
[2, 5]
[1, 7]

谢谢.

推荐答案

int[][] d2 = {
           {2,5},
           {4,18},
           {1,7},
           {9,3}
          };

java.util.Arrays.sort(d2, new java.util.Comparator<int[]>() {
    public int compare(int[] a, int[] b) {
        return b[0] - a[0];
    }
});

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