为什么枚举会实现接口? [英] Why would an Enum implement an Interface?

问题描述

我刚刚发现 Java 允许枚举实现接口.什么是好的用例?

I just found out that Java allows enums to implement an interface. What would be a good use case for that?

推荐答案

枚举不仅仅代表被动集合(例如颜色).它们可以表示具有功能的更复杂的对象，因此您可能希望为这些对象添加更多功能 - 例如您可能有诸如 Printable、Reportable 等接口和支持这些的组件.

Enums don't just have to represent passive sets (e.g. colours). They can represent more complex objects with functionality, and so you're then likely to want to add further functionality to these - e.g. you may have interfaces such as Printable, Reportable etc. and components that support these.

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