代碼:

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

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運行結果:

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