多线程详解p18、Lock锁

package gaoji;
import java.util.concurrent.locks.ReentrantLock;
public class Lock {
    public static void main(String[] args) {
        Ticket ticket = new Ticket();
        new Thread(ticket,"AA").start();
        new Thread(ticket,"BB").start();
        new Thread(ticket,"CC").start();
    }
}
class Ticket implements Runnable{
    int ticke=20;
    ReentrantLock lock = new ReentrantLock();
    @Override
    public void run() {
        while (true){
        //使用sleep使多个线程都进入
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            try {
            //哪个线程获得锁哪个去进行判断，结束之后在释放
                lock.lock();
                if (ticke > 0) {
                    try {
                        Thread.sleep(1);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    System.out.println(Thread.currentThread().getName() + "买到了" + ticke--);
                } else {
                    break;
                }
            }finally {
                lock.unlock();
            }
        }
    }
}