CountDownLatch 多线程demo
来源:互联网 发布:服务号多域名授权 编辑:程序博客网 时间:2024/05/19 14:53
CountDownLatch,一个同步辅助类,在完成一组正在其他线程中执行的操作之前,它允许一个或多个线程一直等待。
主要方法
public CountDownLatch(int count);
public void countDown();
public void await() throws InterruptedException
构造方法参数指定了计数的次数
countDown方法,当前线程调用此方法,则计数减一
awaint方法,调用此方法会一直阻塞当前线程,直到计时器的值为0
例子
- public class CountDownLatchDemo {
- final static SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
- public staticvoid main(String[] args) throws InterruptedException {
- CountDownLatch latch=new CountDownLatch(2);//两个工人的协作
- Worker worker1=new Worker("zhang san",5000, latch);
- Worker worker2=new Worker("li si",8000, latch);
- worker1.start();//
- worker2.start();//
- latch.await();//等待所有工人完成工作
- System.out.println("all work done at "+sdf.format(new Date()));
- }
- static class Workerextends Thread{
- String workerName;
- int workTime;
- CountDownLatch latch;
- public Worker(String workerName ,int workTime ,CountDownLatch latch){
- this.workerName=workerName;
- this.workTime=workTime;
- this.latch=latch;
- }
- public void run(){
- System.out.println("Worker "+workerName+" do work begin at "+sdf.format(new Date()));
- doWork();//工作了
- System.out.println("Worker "+workerName+" do work complete at "+sdf.format(new Date()));
- latch.countDown();//工人完成工作,计数器减一
- }
- private void doWork(){
- try {
- Thread.sleep(workTime);
- } catch (InterruptedException e) {
- e.printStackTrace();
- }
- }
- }
- }
输出:
Worker zhang san do work begin at 2011-04-14 11:05:11
Worker li si do work begin at 2011-04-14 11:05:11
Worker zhang san do work complete at 2011-04-14 11:05:16
Worker li si do work complete at 2011-04-14 11:05:19
all work done at 2011-04-14 11:05:19
- CountDownLatch 多线程demo
- 多线程Demo-CountDownLatch减数器
- CountDownLatch demo
- 多线程-CountDownLatch
- 多线程-CountDownLatch
- 多线程 countDownLatch
- Java多线程之CountDownLatch
- Java多线程之CountDownLatch
- 多线程计数器锁存器---CountDownLatch
- java 多线程 CountDownLatch用法
- Java多线程之CountDownLatch
- 多线程CountDownLatch用法
- JAVA多线程之CountDownLatch
- java 多线程 CountDownLatch用法
- Java多线程之CountDownLatch
- java 多线程 CountDownLatch用法
- java 多线程 CountDownLatch用法
- java 多线程 CountDownLatch用法
- 细说linux挂载
- iOS开发之苹果开发者客服电话
- Shape of HDU_hdu_2108(几何).java
- C中的volatile用法
- hdu-2108-Shape of HDU(计算几何)
- CountDownLatch 多线程demo
- Sqlite3支持的数据类型 日期函数 Sqlite3 函数
- Android Shape 使用
- redis数据库之事务
- j2ee model1模型完成分页逻辑的实现 详解!
- Microsoft Silverlight 4 Tools for Visual Studio 2010
- onvif开发:使用wsdl2h和soap2cpp生成开发文件
- .Net 中的序列化与反序列化
- 如何度量与分析幸福