[定义枚举](%E5%AE%9A%E4%B9%89%E6%9E%9A%E4%B8%BE.md) [常用方法](%E5%B8%B8%E7%94%A8%E6%96%B9%E6%B3%95.md) [枚举常量](%E6%9E%9A%E4%B8%BE%E8%B5%8B%E5%80%BC.md)