Lock锁
使用try...finally...来保证释放锁unlock()一定会被执行。
public class SellTickets implements Runnable{ //共有100张票 private int tickets = 100; private Object obj = new Object(); private Lock lock = new ReentrantLock(); @Override public void run() { while (true) { try { lock.lock(); if (tickets > 0) { try { Thread.sleep(100); } catch (InterruptedException e) { e.printStackTrace(); } System.out.println(Thread.currentThread().getName() + "正在出售第" + tickets + "张票"); tickets--; } } finally { lock.unlock(); } } } } public class SellTicketsDemo { public static void main(String[] args) { SellTickets st = new SellTickets(); Thread t1 = new Thread(st,"窗口1"); Thread t2 = new Thread(st,"窗口2"); Thread t3 = new Thread(st,"窗口3"); t1.start(); t2.start(); t3.start(); } }
运行结果:
学习的博客多用于在笔记中,防止笔记过于臃肿,所以将样例及运行结果放在博客中,后以超链接的形式记录在笔记中,所以有些博文过于单薄。如果有小伙伴遇到问题欢迎评论,看到就会回复,学渣一枚,加油努力。