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

问题描述

我刚刚发现Java允许枚举实现一个接口。这将是一个很好的用例。

解决方案

枚举不仅仅是表示被动集（如颜色）。它们可以用功能代表更复杂的对象，因此您可能希望为其添加更多功能。您可能有接口，例如可打印，可报告等和支持这些的组件。

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

解决方案

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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