Java collection framework - Map

1, Map interface description Store double column data and key value pair data -- similar to functions in high school Understanding of Map structure: Keys in Map: unordered and non repeatable. Use Set to store all keys - > the class where the key belongs is required to override the equals() method and hashCode() method Value in Map: an ...

Added by acrayne on Fri, 10 Sep 2021 20:07:50 +0300