得到线程返回值Future、Callable

public static void main(String[] args) throws InterruptedException, ExecutionException {
		ExecutorService executorService=Executors.newSingleThreadExecutor();
		Future<String> future=executorService.submit(new Callable(){
			public String call() throws Exception {
				Thread.sleep(3000);
				return "Hello World!";
			}
			
		});
		System.out.println("等待结果……");
		System.out.println("得到结果："+future.get());
		executorService.shutdown();
	}