如何关闭ExecutorService Runnables的许多实例？(How to shutdown many instances of the ExecutorService Runnables?)

 我试图了解如何处理执行Runnable命令的ExecutorService的许多实例。 关于提供的代码，如果我在固定线程池设置为1的情况下执行一百个Runnables，则需要多少次关闭？ 我认为代码应该在for循环执行顺序中使用单个线程顺序执行一百个期货（从不产生多于一个线程），并且需要单个ExecutorService关闭。 它是否正确？ 此外，在for循环完成后立即调用shutdown是可以的，因为所有100个期货都在队列中，因此在所有一百个期货完成后，executorService将自动关闭。 只是寻找一些澄清，谢谢。 
 
public static void main(String[] args)
{
    private static ExecutorService executorService = Executors.newFixedThreadPool(1);

    for (int i = 0; i < 100; i++)
    {
        executorService.execute(new Runnable() {
            @Override
            public void run()
            {
                // do stuff
            }
        });
    }

    executorService.shutdown();
}   

I am attempting to understand how to handle many instances of the ExecutorService executing Runnable commands. With regards to the code provided, how many shutdowns are required if I execute a hundred Runnables with the fixed thread pool set to one? I think the code should execute a hundred futures sequentially in the for loop execution order with a single thread (never spawns more than a single thread), and requires a single ExecutorService shutdown. Is this correct? Also, it's ok to call shutdown right after the for loop completes because all hundred of the futures are in queue so that the executorService shutdown will occur automatically after all hundred futures complete. Just looking for some clarification, thanks.
 
public static void main(String[] args)
{
    private static ExecutorService executorService = Executors.newFixedThreadPool(1);

    for (int i = 0; i < 100; i++)
    {
        executorService.execute(new Runnable() {
            @Override
            public void run()
            {
                // do stuff
            }
        });
    }

    executorService.shutdown();
}   

原文：https://stackoverflow.com/questions/21689174