Package hashbidimap implements a bidirectional map backed by two hashmaps.

Package hashmap implements a map backed by a hash table.

Package linkedhashmap is a map that preserves insertion-order.

Package treebidimap implements a bidirectional map backed by two red-black tree.

Package treemap implements a map backed by red-black tree.

BidiMap interface that all bidirectional maps implement (extends the Map interface).

Map interface that all maps implement.