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CountDownLatchTest.java

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import java.util.concurrent.*;

/**

* @author xjn

* @since 2020-03-02

*/

public class CountDownLatchTest {

public static void main(String[] args) throws Exception {

// test1();

test2();

}

public static void test1() throws Exception {

CountDownLatch countDownLatch = new CountDownLatch(5);

for (int i = 0; i < 5; i++) {

new Thread(() -> {

try {

Thread.sleep(new Double(Math.random() * 3000).longValue());

System.out.println(Thread.currentThread().getName() + " :准备就绪");

countDownLatch.countDown();

} catch (Exception e) {

}

}).start();

}

countDownLatch.await();

System.out.println("游戏开始");

}

public static void test2() {

CyclicBarrier cyclicBarrier = new CyclicBarrier(5);

for (int i = 0; i < 5; i++) {

new Thread(() -> {

try {

Thread.sleep(new Double(Math.random() * 3000).longValue());

System.out.println(Thread.currentThread().getName() + " :准备就绪");

cyclicBarrier.await();

} catch (Exception e) {

}

}).start();

}

System.out.println("游戏开始");

}

public static void test3() {

Phaser phaser = new Phaser();

}

}