实例025-实现矩阵的转置

题目：实现二维数组的矩阵转置

public class MatrixTranspose {
    public static void main(String[] args) {
        int arr[][] = new int[][]{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
        printArray(arr);
        int arr2[][]=new int[arr.length][arr.length];
        for (int i = 0; i < arr.length; i++) {
            for (int j = 0; j < arr[i].length; j++) {
                arr2[i][j]=arr[j][i];
            }
        }
        printArray(arr2);
 
    }
 
    private static void printArray(int[][] arr) {
        for (int i = 0; i < arr.length; i++) {
            for (int j = 0; j < arr.length; j++) {
                System.out.print(arr[i][j]+" ");
            }
            System.out.println();
        }
    }
}

运行结果：

1 2 3
4 5 6
7 8 9
1 4 7
2 5 8
3 6 9

Process finished with exit code 0