多线程辅助类-CountDownLatch的用法
2014-10-20 18:45
555 查看
转自:http://www.iteye.com/topic/1002652
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
Java代码
public class CountDownLatchDemo {
final static SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
public static void 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 Worker extends 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,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
Java代码
public class CountDownLatchDemo {
final static SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
public static void 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 Worker extends 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
相关文章推荐
- 两个重要的多线程辅助类之CyclicBarrier和CountDownLatch的用法
- 多线程辅助类-CountDownLatch的用法
- 【Java多线程】同步辅助类CountDownLatch
- CountDownLatch 多线程同步辅助类用法
- java 多线程 CountDownLatch用法
- Java多线程之1-- CountDownLatch的用法
- java多线程 栅栏(CyclicBarrier) 和 多线程辅助类 CountDownLatch
- Java多线程---CountDownLatch用法实例
- java多线程:13、CountDownLatch同步辅助类【计数器】
- C# 多线程辅助类实现多任务
- 多线程的同步 critical section 类的用法与解析
- 多线程的同步critical section类的用法与解析
- 多线程实现,synchronized用法
- java 多线程 同步 synchronized 的个人理解和用法
- linux多线程的总结(pthread用法)
- cocos2d-x,Ios里面多线程的用法
- VC中多线程用法——AfxBeginThread的用法
- MFC多线程各种线程用法
- 多线程中lock用法
- C#多线程中lock的用法