Executors.newSingleThreadSchedul

1. Executors.newSingleThreadScheduledExecutor()

public static void main(String[] args) throws Exception {
    ScheduledExecutorService service = Executors.newSingleThreadScheduledExecutor();
    // 1秒打印一次 当前线程名
    service.scheduleAtFixedRate(() -> System.out.println(Thread.currentThread().getName()), 1, 1, TimeUnit.SECONDS);
    // 主线程等待10秒
    TimeUnit.SECONDS.sleep(10);
    System.out.println("主线程退出了");
}

输出结果了如下：

pool-1-thread-1
pool-1-thread-1
pool-1-thread-1
pool-1-thread-1
pool-1-thread-1
pool-1-thread-1
pool-1-thread-1
pool-1-thread-1
pool-1-thread-1
主程序退出了
pool-1-thread-1
pool-1-thread-1
pool-1-thread-1
pool-1-thread-1
pool-1-thread-1
pool-1-thread-1

2. Executors.newSingleThreadScheduledExecutor(ThreadFactory threadFactory)

public static void main(String[] args) throws Exception {
        ScheduledExecutorService service = Executors.newSingleThreadScheduledExecutor(r -> {
            Thread t = new Thread(r, "SubThread");
            // 设置线程为守护线程，主线程退出，子线程也随之退出
            t.setDaemon(true);
            return t;
        });
        // 1秒打印一次 当前线程名
        service.scheduleAtFixedRate(() -> System.out.println(Thread.currentThread().getName()), 1, 1, TimeUnit.SECONDS);
        // 主线程等待10秒
        TimeUnit.SECONDS.sleep(10);
        System.out.println("主线程退出了");
    }

输出结果了如下：

SubThread
SubThread
SubThread
SubThread
SubThread
SubThread
SubThread
SubThread
SubThread
SubThread
主线程退出了