3.1.7 线程阻塞工具类：LockSupport

weixin_30384031

于 2018-02-07 10:48:00 发布

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文章标签： java

原文链接：http://www.cnblogs.com/anxbb/p/8425555.html

版权

本文提供了一个关于Java并发工具包中LockSupport类的使用示例。通过两个线程的交互展示了如何利用LockSupport.park()和LockSupport.unpark()方法实现线程间的阻塞与唤醒。这对于理解线程间同步机制非常有帮助。

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package 第三章.线程阻塞工具LockSupport;

import java.util.concurrent.locks.LockSupport;

/**
 * Created by zzq on 2018/2/2.
 */
public class LockSupportDemo {
    public static Object u = new Object();
    static ChangeObjectThread t1 = new ChangeObjectThread("t1");
    static ChangeObjectThread t2 = new ChangeObjectThread("t2");

    public static class ChangeObjectThread extends Thread {
        public ChangeObjectThread(String name) {
            super.setName(name);
        }

        public void run() {
            synchronized (u) {
                try {
                    Thread.sleep(3000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                System.out.println("in " + getName());
                LockSupport.park();
                System.out.println("out " + getName());
            }
        }
    }


    public static void main(String args[]) throws InterruptedException {
        t1.start();
        Thread.sleep(3000);
        t2.start();
        LockSupport.unpark(t1);
        LockSupport.unpark(t2);
        t1.join();
        t2.join();
    }
}