java Lock接口详解及实例代码

java  Lock接口

java.util.concurrent.locks

接口Lock

public interface Loce

Loce实现提供了比使用synchronized方法和语句可获得的更广泛的锁定操作

import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class IntegerDemo {
 public static void main(String[] args) {
   // 创建3个线程对象
   SellTicket st = new SellTicket();

Thread t1 = new Thread(st, "窗口1");
   Thread t2 = new Thread(st, "窗口2");
   Thread t3 = new Thread(st, "窗口3");

// 启动线程
   t1.start();
   t2.start();
   t3.start();
 }
}

class SellTicket implements Runnable {
 private int ticket = 100;
 private Lock lock = new ReentrantLock();

public void run() {
   while (true) {
     lock.lock();

if (ticket > 0) {
       try {
         Thread.sleep(100);
       } catch (InterruptedException e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
       }

System.out.println(Thread.currentThread().getName() + "正在出售第" + (ticket--) + "张票。");
     }

lock.unlock();
   }
 }
}

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