java - 关闭静态创建的 executorservice block 分配的变量本身？

Question

我只是想知道这段代码是如何工作的解释

假设我们在下面有工作类(class)

 public  class Work  {
    private static ThreadPoolExecutor executorService;

    private  Work(){};

    public static void instansiate(int numberOfThread){
        executorService= (ThreadPoolExecutor) Executors.newFixedThreadPool(numberOfThread);
    }

    public static void shutDown(){
        executorService.shutdown();
    }

    public static ExecutorService getExecutorService() {
        return executorService;
    }

    public static int getThreadCount(){
        return executorService.getCorePoolSize();
    }
}

我在下面的方法中调用这个类

 public static void xx() throws ExecutionException, InterruptedException {
    Work.instansiate(2);
    System.out.println("Thread count= " + Work.getThreadCount());
    ExecutorService executorService = Work.getExecutorService();
    Future<String> future1 = executorService.submit(new Callable<String>() {
        @Override
        public String call() throws Exception {
            return "future1";
        }
    });
    String resFuture1 = future1.get();
    System.out.println(resFuture1);
    Work.shutDown();
    Future<String> future2 = executorService.submit(new Callable<String>() {
        @Override
        public String call() throws Exception {
            return "future2";
        }
    });

    String resFuture2 = future2.get();
    System.out.println(resFuture2);

}

这段代码在 Work.shutDown() 行之后抛出异常，并表示被 java.util.concurrent.ThreadPoolExecutor@234bef66[Termied, pool size = 0, activethreads = 0 ...

我已将 Work.getExecutorService 分配给另一个 executorService，关闭 Work executorservice 如何阻止分配的一个。

Answer 1

实际上executorService与Work.executorService()持有相同的引用，因此受到关闭Work的executorservice的影响。