The Apache Commons Collections package contains types that extend and augment the Java Collections Framework.

Types that extend and augment the Java Collections Framework.

Commons Primitives

This artifact provides efficient implementations for various collection data structures (esp. linked lists and priority queues), which have very insufficient implementation in the Java Collections Framework that makes it hard or even ...

Common utilities and classes for collections.

Collections library of the Staccato-Commons project, focused on providing new abstractions that mix object oriented and functional programming style for dealing with iterable objects.