CyclicBarrier簡介

package CyclicBarrier;

import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.atomic.AtomicInteger;

public class TestCyclicBarrier {

    private static final int THREAD_NUM = 5;
    static AtomicInteger jisu = new AtomicInteger(0);

    public static class WorkerThread implements Runnable{

        CyclicBarrier barrier;

        public WorkerThread(CyclicBarrier b){
            this.barrier = b;
        }

        @Override
        public void run() {
            // TODO Auto-generated method stub
            try{
               jisu.incrementAndGet();
                System.out.println("Worker's waiting");
                //线程在这里等待，直到所有线程都到达barrier。
                barrier.await();
                System.out.println("ID:"+Thread.currentThread().getId()+" Working"+" 最終得出相同的jusu "+jisu);
            }catch(Exception e){
                e.printStackTrace();
            }
        }

    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        CyclicBarrier cb = new CyclicBarrier(THREAD_NUM, new Runnable() {
            //当所有线程到达barrier时执行
            @Override
            public void run() {
                System.out.println("規定綫程數都到達會到達這裏這裏處理完其他綫程處理await()後面代碼");
                try {
                   Thread.sleep(1000);
               } catch (InterruptedException e) {}

            }
        });

        for(int i=0;i<THREAD_NUM;i++){
            new Thread(new WorkerThread(cb)).start();
        }
    }

}