package java03;

import java.util.Arrays;

public class ArrayRowColumnSwap {

public static void main(String[] args){

int arr1[][] = new int[][]{{1,2,3},{4,5,6}};

System.out.println("置换前：");

System.out.println(Arrays.deepToString(arr1));

int arr2[][] = new int[arr1[0].length][arr1.length];

for(int i=0;i<arr1.length;i++){

for(int j=0;j<arr1[i].length;j++){

arr2[j][i] = arr1[i][j];

}

}

System.out.println("置换后：");

System.out.println(Arrays.deepToString(arr2));

System.out.println();

int arr3[][] = new int[][]{{1,2,3},{4,5,6},{7,8,9}};

for(int i=0;i<arr3.length;i++){

for(int j=0;j<arr3[i].length;j++){

System.out.print(arr3[i][j]+" ");

}

System.out.println();

}

int tr = 0;

for(int i=0;i<arr3.length;i++){

tr += arr3[i][i];

}

// 数组的迹

System.out.println(tr);

}

}