java多线程之CyclicBarrier的使用方法
public class CyclicBarrierTest {
public static void main(String[] args) {
ExecutorService service = Executors.newCachedThreadPool();
final CyclicBarrier cb = new CyclicBarrier(3);
for(int i=0;i<3;i++){
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,继续走啊":"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2,当前已有" + (cb.getNumberWaiting()+1) + "个已经到达," + (cb.getNumberWaiting()==2?"都到齐了,继续走啊":"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,继续走啊":"正在等候"));
cb.await();
} catch (Exception e) {
e.printStackTrace();
}
}
};
service.execute(runnable);
}
service.shutdown();
}
}
运行结果如下:
线程pool-1-thread-3即将到达集合地点1,当前已有1个已经到达,正在等候
线程pool-1-thread-1即将到达集合地点1,当前已有2个已经到达,正在等候
线程pool-1-thread-2即将到达集合地点1,当前已有3个已经到达,都到齐了,继续走啊
线程pool-1-thread-3即将到达集合地点2,当前已有1个已经到达,正在等候
线程pool-1-thread-1即将到达集合地点2,当前已有2个已经到达,正在等候
线程pool-1-thread-2即将到达集合地点2,当前已有3个已经到达,都到齐了,继续走啊
线程pool-1-thread-1即将到达集合地点3,当前已有1个已经到达,正在等候
线程pool-1-thread-3即将到达集合地点3,当前已有2个已经到达,正在等候
线程pool-1-thread-2即将到达集合地点3,当前已有3个已经到达,都到齐了,继续走啊
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