05 2017 档案

摘要：这是一个多值Map的工具类。这个map的值都是collection类型。（如果同一个key只put了一次，那么还get到的还是Collection类型） 阅读全文

摘要：A bimap (or "bidirectional map") is a map that preserves the uniqueness ofits values as well as that of its keys. This constraint enables bimaps tosup 阅读全文