If we consider the WeighingMachine interface, the weighJar() method needs to be frequently polled, so it's sensible to have a dedicated thread for each ProductionLine to make the design scalable.

如果考虑 WeighingMachine 接口，weighJar() 方法需要频繁轮询，因此明智的做法是为每个 ProductionLine 使用一个专用线程，使设计可伸缩。

youdao