private static final ExecutorService pool = Executors.newFixedThreadPool(threads);

 pool.execute(new Runnable() {
            @Override
            public void run() {
                try {
                    TimeUnit.SECONDS.sleep(30);
                    System.out.println(1);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        });
        
pool.shutdown();
pool.awaitTermination(60,TimeUnit.SECONDS);

//關(guān)閉之后我 會報錯
//Exception in thread "main" java.util.concurrent.RejectedExecutionException
executorService.execute(new Runnable() {
            @Override
            public void run() {
                System.out.println(2);
            }
        });

原因是shutdown之后線程池?zé)o法再提交任務(wù)。有沒有方法讓這個線程池再打開呢？