何时在 Java 中使用 Enum 或 Collection
在什么情况下，枚举比保证唯一元素的 Collection(我猜是 java.util.Set 的实现者……)更合适?
Under what circumstances is an enum more appropriate than, for example, a Collection that guarantees unique elements (an implementer of java.util.Set, I guess...)?
(这是我之前的 问题)
推荐答案
基本上当它是一个定义明确的、在编译时已知的固定值集时.
Basically when it's a well-defined, fixed set of values which are known at compile-time.
您可以非常轻松地将枚举用作集合(使用 EnumSet)，它允许您定义行为、按名称引用元素、打开它们等.
You can use an enum as a set very easily (with EnumSet) and it allows you to define behaviour, reference the elements by name, switch on them etc.
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