Java - 运行两次线程 [英] Java - Running a thread twice

问题描述

来自其他帖子：

如果一个线程需要多次运行，那么应该创建一个
线程的新实例并在其上调用start。

If a Thread needs to be run more than once, then one should make an new instance of the Thread and call start on it.

这是怎么做的？

推荐答案

我会使用另一层抽象。使用 ExecutorService 。

I would use another layer of abstraction. Use an ExecutorService.

这是一个简单的例子：

public static void main(String args[]) throws InterruptedException {
    final ExecutorService service = Executors.newCachedThreadPool();
    final class MyTask implements Runnable {

        @Override
        public void run() {
            System.out.println("Running my task.");
        }
    };
    for (int i = 0; i < 10; ++i) {
        service.submit(new MyTask());
    }
    service.shutdown();
    service.awaitTermination(1, TimeUnit.DAYS);
}

只需将您的任务转储到服务你想要的次数。

Just dump your task into the service as many times as you want.

ExecutorService 是一个线程池 - 它有一个数字 Thread 的任务，它们可以随时执行任务。这消除了产生新的 Thread 的开销，因为它会缓存它们。

The ExecutorService is a thread pool - it has a number of Threads that take tasks as they come. This removes the overhead of spawning new Threads because it caches them.

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