用java来模拟抢手气红包，多线程

在上一个模拟微信抢红包的基础上，添加多线程

代码

import java.math.BigDecimal;
import java.util.Scanner;
public class qianhoubao {
    public static void main(String[] args) {
        System.out.println("-----模拟微信发拼手气红包-----");
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入所发红包的总金额");
        double money= sc.nextDouble();
        System.out.println("请输入群成员个数");
        int people = sc.nextInt();
        String[] name = new String[people];
        for (int i=0;i<people;i++){
            System.out.println("请输入群成员名字");
            name[i] = sc.next();
        }
        System.out.println("请输入所发红包的个数");
        int num=sc.nextInt();
        if (money / num == 0.01) {
            for (int i = 0; i <people; i++) {
                System.out.println(name[i] + "抢到红包红包0.01元");
            }

        } else if (money / num < 0.01) {
            System.out.println("金额过小或个数过大，不合理！，请重新输入！");
        } else {
            Hongbao n=new Hongbao(num,money);
            System.out.println("抢红包开始，红包总共"+money+"元");
            for (int i = 0; i <people; i++) {
                
                new Thread(new People(i, n,name)).start();


            }

        }


    }
}
class Hongbao{
    int num;
    double money;
    public  Hongbao(int num,double money){
        this.num=num;
        this.money=new BigDecimal(money).setScale(2,BigDecimal.ROUND_HALF_UP).doubleValue();
    }
    synchronized  public  double qiang(){
        double ramoney;
        if(num>1){
            ramoney=new BigDecimal(Math.random()*money).setScale(2,BigDecimal.ROUND_HALF_UP).doubleValue();
            money-=ramoney;
            num--;

        }else if (num==1){
            ramoney=new BigDecimal(money).setScale(2,BigDecimal.ROUND_HALF_UP).doubleValue();
            money=0;
            num--;

        }else {
            ramoney=0;
        }
        return  ramoney;
    }

}
class People implements Runnable{
    int id;
    Hongbao n;
    String[] name;
    double idmoney;
    public  People(int id,Hongbao n ,String[] name){
        this.id=id;
        this.n=n;
        this.name=name;
    }


    @Override
    public void run() {
        System.out.println(name[id]+"，开始抢红包");
        try{
            Thread.sleep(500);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        idmoney=n.qiang();
        if(idmoney>0){
            System.out.println("恭喜，"+name[id]+"抢到"+idmoney+"元");

        }else {
            System.out.println("很遗憾，"+name[id]+"手速慢了，未抢到红包");
        }

    }
}