[Java] JAVA多线程抢红包的实现示例

import java.util.Random;
import java.util.Scanner;
 
public class Main {
  public static void main(String[] args) {
  int person_num, red_pocket_num, sum_money;
  Scanner scanner = new Scanner(System.in);
  System.out.println("请设置红包个数:");
  red_pocket_num = scanner.nextInt();
  System.out.println("请设置总金额数量(分):");
  sum_money = scanner.nextInt();
  if(sum_money < red_pocket_num) {
    System.out.println("钱不够，退出程序。");
    return;
  }
  System.out.println("请设置抢红包成员个数:");
  person_num = scanner.nextInt();
  myRunnable myrunnable = new myRunnable(sum_money,red_pocket_num);
  Thread []person = new Thread[person_num];
  for (int i = 0; i < person_num; i++) {
    person[i] = new Thread(myrunnable);
    person[i].setName("用户"+(i+1));
    person[i].start();
  }
  }
}
class myRunnable implements Runnable{
  private int []red_pocket;
  private int num;
  private int now_num;
  public myRunnable(int money, int num) {
  this.red_pocket = new Red_Pocket(money, num).get_red_packets();
  this.num = num;
  this.now_num = num;
  }
  @Override
  public void run() {
  if(this.num>0){
    System.out.println(Thread.currentThread().getName()+"抢到了红包 "+(this.num-this.now_num+1)+" : "+red_pocket[--this.now_num]+"分");
  }
  else{
    System.out.println(Thread.currentThread().getName()+"未抢到红包。");
  }
  }
}
class Red_Pocket{
  private long seed;
  private int money;
  private int num;
  public int[] get_red_packets() {
  if(this.money < this.num) return new int[0];
  Random random = new Random(this.seed);
  this.seed = random.nextLong();
  int[] res = new int[this.num];
  double[] temp = new double[this.num];
  double sum = 0;
  int sum2 = 0;
  for (int i = 0; i < this.num; i++) {
    temp[i] = random.nextDouble();
    sum += temp[i];
  }
  for (int i = 0; i < this.num; i++) {
    res[i] = 1 + (int)(temp[i] / sum * (this.money - this.num));
    sum2 += res[i];
  }
  res[random.nextInt(this.num)] += this.money - sum2;
  return res;
  }
  private void init() {
  this.seed = new Random(System.currentTimeMillis()).nextLong();
  }
  public Red_Pocket(int money,int num) {
  init();
  this.money = money;
  this.num = num;
  }
}