package com.java.concurrent;import java.util.concurrent.CountDownLatch; /*** CountDownLatch: 閉鎖，在完成某些運(yùn)算的時(shí)候，只有其它所有線程的運(yùn)算全部完成后，當(dāng)前運(yùn)算才會(huì)執(zhí)行* @author fliay**/ public class TestCountDownLatch {public static void main(String[] args) {final CountDownLatch latch = new CountDownLatch(10);LactchDemo Ld = new LactchDemo(latch);long start = System.currentTimeMillis();for (int i = 0; i < 5; i++) {new Thread(Ld).start();new Thread(Ld).start();}try {latch.await();//執(zhí)行等待} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}long end = System.currentTimeMillis();System.out.println("消耗時(shí)間為：" + (end - start));}}class LactchDemo implements Runnable {private CountDownLatch latch;public LactchDemo(CountDownLatch latch) {this.latch = latch;}public void run() {synchronized (this) {try {for (int i = 0; i < 10; i++) {if (i % 2 == 0) {System.out.println(i);}}} finally {// 啟動(dòng)閉鎖latch.countDown();}}}}

　　

轉(zhuǎn)載于:https://www.cnblogs.com/fliay/p/7651039.html

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