帮一个初学者朋友写的矩阵加法

package com.javaeye.sunhj.test;

import java.util.Random;

public class Maintest1 {
    public static void main(String[] args) {
        //定义两个2维数组
        int[][] array1 = new int[3][5];
        int[][] array2 = new int[3][5];
       
        //定义一个随机数
        Random random = new Random();
       
        //为数组赋值
        for(int i=0; i<=array1.length-1; i++) {
            for(int j=0; j<=array1[i].length-1; j++) {
                //分别去小于100的随机数为数组赋值
                array1[i][j] = random.nextInt(100);
                array2[i][j] = random.nextInt(100);
            }
        }
       
        //定义一个结果2维数组
        int[][] totalArray = new int[3][5];
       
        //计算结果
        for(int i=0; i<=array1.length-1; i++) {
            for(int j=0; j<=array1[i].length-1; j++) {
                //分别去小于100的随机数为数组赋值
                totalArray[i][j] = array1[i][j] + array2[i][j];
            }
        }
       
        //输出2维数组       
        for(int i=0; i<=array1.length-1; i++) {
            for(int j=0; j<=array1[i].length-1; j++) {
                System.out.print(array1[i][j] + " ");
            }
            System.out.println();
        }
       
        System.out.println(" + ");
       
        for(int i=0; i<=array2.length-1; i++) {
            for(int j=0; j<=array2[i].length-1; j++) {
                System.out.print(array2[i][j] + " ");
            }
            System.out.println();
        }
       
        System.out.println(" = ");
       
        for(int i=0; i<=totalArray.length-1; i++) {
            for(int j=0; j<=totalArray[i].length-1; j++) {
                System.out.print(totalArray[i][j] + " ");
            }
            System.out.println();
        }
    }
}

 输出结果