线程池中所有线程结束捕捉

  下面的代码只是一个引子或者一种方案。    

  ThreadPoolExecutor threadPool=new ThreadPoolExecutor(20, 50, 50000,TimeUnit.MILLISECONDS
            , new ArrayBlockingQueue<Runnable>(5, true));
        for(int i=0;i<30;i++)
        {
            threadPool.execute(new Runnable()
            {
                public void run()
                {
                    try
                    {
                        int random=getRandom(500, 4000);
                        Thread.sleep(random);
                        ++count;
                        if(count>=30)
                        {
                          System.out.println("All Thread is Finished!!!!!!!!!!!!!!"); 
                        }
                    }catch (InterruptedException e){}
                }
            });
        }