Jakarta Commons Collections Package

Java Collections Framework extensions.

See:
Description

Jakarta-commons Collections

org.apache.commons.collections

Java Collections Framework extensions.

Other Packages

org.apache.commons.collections.comparators	Contains concrete Comparator implementations.
org.apache.commons.collections.iterators	Contains concrete Iterator implementations and utilities.

Java Collections Framework extensions.

See also the java.util package.

Category	Classes	Comments
List Implementations	CursorableLinkedList FastArrayList	Special-purpose implementations of the List interface.
Map Implementations	BeanMap DoubleOrderedMap ExtendedProperties FastHashMap FastTreeMap LRUMap MultiHashMap ProxyMap ReferenceMap SequencedHashMap SoftRefHashMap StaticBucketMap	Special-purpose implementations of the Map interface and associated classes.
Buffer Interface and Implementations	ArrayStack BinaryHeap BoundedFifoBuffer Buffer PriorityQueue SynchronizedPriorityQueue UnboundedFifoBuffer	New collection interface that specifies a removal order for the collection, used to implement queues and queue-like things.
Bag Interface and Implementations	Bag DefaultMapBag HashBag SortedBag TreeBag	New collections interface that keeps a count of its members.
Utilities	BagUtils BufferUtils CollectionUtils ComparatorUtils ListUtils MapUtils SetUtils	Manipulate collection objects, determine set theoretic properties, ensure type-safety, provide decorators, etc.
Functor Interfaces	Factory Predicate Closure Transformer	Create views or functors on a collection. If your collection represents X, these allow you to define and look at f(X).
Miscellaneous	StringStack DefaultMapEntry	A stack of strings; and the trivial implementation of Map.Entry.