多线程之Lock锁

ReentrantLock:可重入锁
代码:

package com.qiu.syn;

import java.util.concurrent.locks.ReentrantLock;

public class TestLock {
    public static void main(String[] args) {
        TestLock2 testLock2 = new TestLock2();

​        new Thread(testLock2).start();
​        new Thread(testLock2).start();
​        new Thread(testLock2).start();
​    }

}
class TestLock2 implements Runnable{
    int ticketNums =10;

​    //定义Lock
​    private final ReentrantLock lock =new ReentrantLock();
​    @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("票拿到了"+ticketNums--);
​                }else {
​                    return;
​                }
​            } finally {
​            //解锁
​                lock.unlock();
​            }
​        }
​    }
}