否则当前线程就进入阻塞状态。

Otherwise, the current thread is blocked.

youdao

当未完成的任务的总数减少到零时，join() 就会结束阻塞状态。

When the count of unfinished tasks drops to zero, join() unblocks.

youdao

当未完成的任务的总数减少到零时，join() 就会结束阻塞状态。

When the count of unfinished tasks drops to zero, join() unblocks.

youdao