执行器服务现在关闭,如何工作

根据方法文件 shutdownNow (执行人服务)

There are no guarantees beyond best-effort attempts to stop
      processing actively executing tasks.  For example, typical
      implementations will cancel via {@link Thread#interrupt}, so any
      task that fails to respond to interrupts may never terminate

我有以下代码:

public static void main(String[] args) throws InterruptedException {
        ExecutorService service = Executors.newSingleThreadExecutor(r -> {
            final Thread thread = new Thread(r);
            thread.setDaemon(false);
            return thread;
        });
        service.submit(() -> {
            while (true) {
                Thread.sleep(1000);
                System.out.println("Done: " + Thread.currentThread().isInterrupted());
            }
        });
        Thread.sleep(3000);
        service.shutdownNow();
    }

这是输出:

Done: false
Done: false

在两个循环之后,停止执行。 关机是怎么打断我的工作的,我只是有无限的循环,没有检查 Thread.currentThread.isInterrupted();

在我心中, 现在关闭 只调用工作线程的中断方法