如何让 ExecutorService 创建 n 个线程执行完全相同的任务？

Question

我正在关注这个例子在该示例中，可以创建一个线程池，该线程池将执行 3 个不同的任务。但是，我只想创建一个由 n 个线程执行的任务。int numberOfThreads = 2;ExecutorService executorService = Executors.newFixedThreadPool(numberOfThreads);Runnable task1 = () -> {  System.out.println("Executing Task1 inside : " +   Thread.currentThread().getName());  try {    TimeUnit.SECONDS.sleep(2);  } catch (InterruptedException ex) {    throw new IllegalStateException(ex);  }};executorService.submit(task1, numberOfThreads); // This is not like this obviously我怎样才能以适当的方式实现这一目标？

Answer 1

它真的没有魔法。您所要做的就是多次提交相同的任务，如下所示：

public static void main(String args[]) {

    int numberOfThreads = 2;

    ExecutorService executorService = Executors.newFixedThreadPool(numberOfThreads);

    Runnable task1 = () -> {

      System.out.println("Executing Task1 inside : " + 

      Thread.currentThread().getName());

      try {

        TimeUnit.SECONDS.sleep(2);

      } catch (InterruptedException ex) {

        throw new IllegalStateException(ex);

      }

    };

    executorService.submit(task1);

    executorService.submit(task1);

}