Active class versus passive class
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: In UML specification superstructure 2.5(still Beta, page 203) A Class may be designated by setting isActive to true as active (i.e., each of its instances is an active object). When isActive is false the Class is passive (i.e., each of its instances executes within the context of some other object). I wonder if there is a simple example illustrates the differences in applying each one of them? And elaborate this concept a bit? 回答1: By definition, Active Objects In UML, active classes, and therefore active objects , exist in their own thread