java多线程顺序打印ABC CountDownLatch方式

最新推荐文章于 2024-02-06 19:40:08 发布

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最新推荐文章于 2024-02-06 19:40:08 发布

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分类专栏： java笔试文章标签： java 多线程

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本文通过一个具体的 Java 多线程示例介绍了 CountDownLatch 的使用方法。示例中创建了三个 CountDownLatch 实例来协调三个线程（A、B、C）的运行顺序，确保线程 A 运行完毕后线程 B 才开始执行，以此类推。

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public class CountDownLatchABC {
    public static void main(String[] args) {
        CountDownLatch countDownLatchA = new CountDownLatch(1);
        CountDownLatch countDownLatchB = new CountDownLatch(1);
        CountDownLatch countDownLatchC = new CountDownLatch(1);

        Thread threadA = new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    countDownLatchA.await();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                System.out.println("A");
                countDownLatchB.countDown();
            }
        });

        Thread threadB = new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    countDownLatchB.await();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                System.out.println("B");
                countDownLatchC.countDown();

            }
        });

        Thread threadC = new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    countDownLatchC.await();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                System.out.println("C");
                countDownLatchC.countDown();


            }
        });

        threadC.start();
        threadB.start();
        threadA.start();

        countDownLatchA.countDown();


    }

}