多线程售票demo,用ReentrantLock实现

代码:

public class TicketReentLockDemo implements Runnable {
    private int ticketTotal = 100;
    private Lock lock = new ReentrantLock();

    @Override
    public void run() {
        while (ticketTotal > 0) {
            try {
                lock.lock();
                if (ticketTotal > 0) {
                    try {
                        TimeUnit.MILLISECONDS.sleep(100);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    System.out.println(Thread.currentThread().getName() + "正在售出第 " + (ticketTotal--));
                }
            } finally {
                lock.unlock();
            }
        }
    }

    public static void main(String[] args) {
        TicketReentLockDemo ticketReentLockDemo = new TicketReentLockDemo();
        Thread thread1 = new Thread(ticketReentLockDemo, "窗口1");
        Thread thread2 = new Thread(ticketReentLockDemo, "窗口2");
        Thread thread3 = new Thread(ticketReentLockDemo, "窗口3");
        thread1.start();
        thread2.start();
        thread3.start();
    }
}

 

 

运行结果: