Extra Collections

Handy utilities for things I wish were in Java's collections api.

Features

• Delegating collections
• Observable collections
• Invertible Map (BiMap)
• Trees
  • Treated as additions to Map<K, Tree<K,V>>
• Tuples
  • Pair
• Common utilities for List, Map, and Set types with features such as:
  • Creating singleton collections
  • Creating disjoint & union collection of two input collections