售票系统模拟

多个线程同时抢票

public class TestDemo{

    @Test
    public void test9() throws Exception {
        CountDownLatch count = new CountDownLatch(1);
        for (int i = 0; i < 5; i++) {
            new Thread(new MyThread(count)).start();
        }
        count.countDown();
    }

    class MyThread implements Runnable {
        private CountDownLatch count;
        MyThread(CountDownLatch count) {
            this.count = count;
        }
        @Override
        public void run() {
            try {
                count.await();
                SellTicjets.sell();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    static class SellTicjets{
        public  static int ticketTotal = 10;
        static Object obj =new Object();
        public static void sell(){
            while (ticketTotal> 0){
                synchronized (obj){
                    if(ticketTotal>0){
                        ticketTotal--;
                       System.out.println("线程" + Thread.currentThread().getName() + "售出一张票，当前剩余票数：" + ticketTotal);
                    }
                }

            }
        }
    }
}

输出结果：

使用CountDownLatch模拟并发，挺好使的，个人很喜欢