Java语言，以5个一排，分为5排输入一个矩阵，并且计算对角线的和

Java语言，以5个一排，分为5排输入一个矩阵，并且计算对角线的和

package cn.bing;

import java.util.Random;

public class test {
public static void main(String[] args) {
//随机生成一个5*5的矩阵，值为0-9
int arr[][]=new int[5][5];
for (int i = 0; i <5 ; i++) {
for (int j = 0; j <5 ; j++) {
Random random=new Random();
int count=random.nextInt(10);
arr[i][j]=count;
}
}
int total1=0;
int total2=0;
//total1的值为左上到右下对角线和
//total1的值为右上到左下对角线和
for(int i=0;i<5;i++){
for(int j=0;j<5;j++){
if(i==j){
total1+=arr[i][j];
}
if(i+j==4){
total2+=arr[i][j];
}
System.out.print(arr[i][j]);
}
System.out.println();
}
System.out.println(total1);
System.out.println(total2);
}
}

package image;

public class Practice
{
public static void main ( String[] args )
{
int[][] array = {
{1,2,3,4,5},
{6,7,8,9,10},
{11,12,13,14,15},
{16,17,18,19,20},
{21,22,23,24,25}
};
int sum = 0;
for ( int i = 0; i < array.length; i++ )
{
sum += array[i][i];
}
System.out.println (sum);

    sum = 0;
    for ( int i = array.length - 1; i >= 0; i-- )
    {
        sum += array[i][i];
    }
    System.out.println (sum);
}

}