搶票系統簡單java

package com.cn;

public class BuyTickes {
 public static volatile int nums = 30;
 public static void buyTickets() {
 System.out.println("當前用戶【線程】" + Thread.currentThread().getName() + "，搶到了第" + nums + "票");
 nums--;
 }

 public static void main(String[] args) {

 for (int i = 0; i < 3; i++) {
 new Thread(() -> {
 while (true){
 synchronized(BuyTickes.class)
 {
 try{
 // Thread.sleep(2);
 if(nums>0){
 buyTickets();
 }else{
 System.out.println("當前窗口已經售完！");
 break;
 }
 }catch(Exception e){
 e.printStackTrace();
 }

 }

 }
 }, i + "線程").start();
 }

 }
}

運行結果：