Detailed explanation of four arithmetic operations methods for implementing random output of 300 questions in Java

This article explains in detail the four arithmetic methods of java to implement random output of 300 questions

package demo;

import java.util.Random;

public class math {
       
    public static void main(String[] args) {
           
        String[] operate=new String[]{"+","-","×","÷"};
           int[] numbers=new int[1000];
           
           for(int i=1;i<=1000;i++){
           numbers[i-1]=i;
       }
          Random r=new Random();
      
          for(int i=0;i<300;i++){
      
              System.out.println(numbers[r.nextInt(1000)]+operate[r.nextInt(4)]+numbers[r.nextInt(1000)]+"=");
       }
      }
     }

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