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