future Callable(线程)

ExecutorService service = Executors.newCachedThreadPool();
       
        Future<String> future = service.submit(new Callable<String>()
        {
            @Override
            public String call()
                throws Exception
            {
                Thread.sleep(5000);
               
                return "future";
            }
        });
       
        String temp = future.get();
       
        System.out.println(temp);