多个线程在指定的集合点(屏障点)等待集合后在继续去下一个集合点
import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class CyclicBarrierTest {
public static void main(String[] args) {
ExecutorService service = Executors.newCachedThreadPool();
final CyclicBarrier cb = new CyclicBarrier(3);//设置等待到达的线程数目
Runnable runnable = new Runnable(){
public void run(){
try {
Thread.sleep((long)(Math.random()*10000));
System.out.println("线程" + Thread.currentThread().getName() +
"即将到达集合地点1，当前已有" + (cb.getNumberWaiting()+1) + "个已经到达，"+(cb.getNumberWaiting()==2?"都到齐了继续走呀":"正在等候"));
cb.await();//到此如果没有达到公共屏障点，则该线程处于等待状态，如果达到公共屏障点则所有处于等待的线程都继续往下运行
Thread.sleep((long)(Math.random()*10000));
System.out.println("线程" + Thread.currentThread().getName() +
"即将到达集合地点2，当前已有" + (cb.getNumberWaiting()+1) + "个已经到达，"+(cb.getNumberWaiting()==2?"都到齐了继续走呀":"正在等候"));
cb.await();
Thread.sleep((long)(Math.random()*10000));
System.out.println("线程" + Thread.currentThread().getName() +
"即将到达集合地点3，当前已有" + (cb.getNumberWaiting()+1) + "个已经到达，"+(cb.getNumberWaiting()==2?"都到齐了继续走呀":"正在等候"));
cb.await();
} catch (Exception e) {
e.printStackTrace();
}
}
};
for(int i=0;i<3;i++){
service.execute(runnable);
}
service.shutdown();
}
}
本文出自 “点滴积累” 博客，请务必保留此出处http://tianxingzhe.blog.51cto.com/3390077/1716837
