如何使用CountDownLatch等待所有线程运行完毕才停止呢?

CountDownLatch所有线程完毕，再详细运行的实现思路
   1.初始化一个CountDownLatch线程数
     1.1 每次线程运行完毕后,调用latch.countDown递减一次
   2.调用await()使线程阻塞
     直到所有线程运行完毕，则向下继续运行

ExecutorService WORKER_THREAD_POOL = Executors.newFixedThreadPool(10);
CountDownLatch latch = new CountDownLatch(2);
for(int i = 0;i< 2; i++){
    WORKER_THREAD_POOL.submit(() -> {
        try {
            // ...
            latch.countDown();
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
    });
}
// wait for the latch to be decremented by the two remaining threads
latch.await();