Lock锁

package cn.ruhsang.gaoji;

import java.util.concurrent.locks.ReentrantLock;

public class TestLock {
    public static void main(String[] args) {
        TestLock2 t1 = new TestLock2();
        new Thread(t1).start();
        new Thread(t1).start();
        new Thread(t1).start();
    }
}



class TestLock2 implements Runnable {
    //定义一个Lock锁
    private final ReentrantLock lock = new ReentrantLock();
    int ticketNums = 10;
    @Override
    public void run() {
        while (true) {

            try {
                lock.lock();//加锁
                if (ticketNums > 0) {
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    System.out.println(ticketNums--);
                }else {
                    break;
                }
            }finally {
                lock.unlock();//解锁
            }

        }
    }
}