final CountDownLatch countDownLatch = new CountDownLatch(lowestAcceptUser.size());

    �
    线程任务内部执行完成 释放
    countDownLatch.countDown();

    等待发令枪 任务结束
    try {
    countDownLatch.await();
    } catch (Exception e) {
    e.printStackTrace();
    }
    �

    �