Note that all the methods, even get(), need to be synchronized for the class to be thread-safe, to ensure that no updates are lost, and that all threads see the most recent value of the counter.

注意所有方法，甚至需要同步 get()，使类成为线程安全的类，从而确保没有任何更新信息丢失，所有线程都看到计数器的最新值。

youdao

After the counter has been incremented, the invoking process does a wait , which leads to the calling thread getting blocked.

在计数增加之后，调用进程执行wait，这导致调用进程受阻塞。

youdao

For example, you could have a global counter, and once it reaches a certain count a thread activates.

比如你可以建立一个全局计数器，一旦它到达某个值一个线程就被激活。

youdao