java 数组交换 - 二维数组
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Array swap - 2d array
提问by TimelordViktorious
I'm working on swapping indices in a two-dimensional array. I seem to be on the right track, but it's not swapping the array in the way I want.
我正在交换二维数组中的索引。我似乎在正确的轨道上，但它没有按照我想要的方式交换阵列。
The first row's index jneeds to be swapped with row 2's index j:
第一行的索引j需要与第 2行的索引交换j：
for (int j = 0; j < array.length ; j++){
int temp = array[row1][j]
array[row1][j]=array[j][row1]
array[j][row1] = temp ;
}
Any ideas on how to best approach this would be appreciated.
关于如何最好地解决这个问题的任何想法将不胜感激。
回答by mreithub
As the two-dimensional array in java is actually a array of references to other arrays, you can simply swap the references as shown below:
由于java中的二维数组实际上是对其他数组的引用的数组，你可以简单地交换引用，如下所示：
public static void swapRows(int array[][], int rowA, int rowB) {
int tmpRow[] = array[rowA];
array[rowA] = array[rowB];
array[rowB] = tmpRow;
}
/edit: edited the answer as I previously misinterpreted it**
/edit：编辑答案，因为我之前误解了它**
