返回执行结果的任务队列:ExecutorCompletionService

        final Random r = new Random();
		// 创建一个固定大小的线程池
		ExecutorService es = Executors.newFixedThreadPool(10);
		// 将所有处理结果提交到一个固定大小的队列(可不指定,默认创建一个无界队列)
		ExecutorCompletionService<String> ecs = new ExecutorCompletionService<String>(
				es,new LinkedBlockingQueue<Future<String>>(1000));
		for (int i = 0; i < 10; i++) {
			//提交所有任务
			ecs.submit(new Callable<String>() {
				@Override
				public String call() throws Exception {
					//模拟一个耗时操作
					long l = r.nextInt(4000);
					Thread.sleep(l);
					return Thread.currentThread().getName() + "|" + l;
				}
			});
			
			try {
				//获得返回结果,3s超时(表示我们能够容忍的最大等待时间)
				System.out.println(ecs.take().get(3, TimeUnit.SECONDS));
            } catch (InterruptedException e) {
            	// 线程被中断
            } catch (ExecutionException e) {
            	//
            	e.printStackTrace();
            } catch (TimeoutException e) {
            	// 超时,放弃这个结果
            }
			
		}
		es.shutdown();

pool-1-thread-1|884
pool-1-thread-2|3469
pool-1-thread-3|1001
pool-1-thread-4|927
pool-1-thread-5|3503
pool-1-thread-6|712
pool-1-thread-7|2015
pool-1-thread-8|2430
pool-1-thread-9|1613
pool-1-thread-10|2583