Java线程池运行状态监控实现解析

private static ExecutorService es = new ThreadPoolExecutor(50, 100, 0L, TimeUnit.MILLISECONDS,    new LinkedBlockingQueue<Runnable>(100000)); public static void main(String[] args) throws Exception {  for (int i = 0; i < 100000; i++) {    es.execute(() -> {      System.out.print(1);      try {        Thread.sleep(1000);      } catch (InterruptedException e) {        e.printStackTrace();      }    });  }   ThreadPoolExecutor tpe = ((ThreadPoolExecutor) es);   while (true) {    System.out.println();     int queueSize = tpe.getQueue().size();    System.out.println("当前排队线程数：" + queueSize);     int activeCount = tpe.getActiveCount();    System.out.println("当前活动线程数：" + activeCount);     long completedTaskCount = tpe.getCompletedTaskCount();    System.out.println("执行完成线程数：" + completedTaskCount);     long taskCount = tpe.getTaskCount();    System.out.println("总线程数：" + taskCount);     Thread.sleep(3000);  } }