# Commons Collections 3.2.1 API

Packages
org.apache.commons.collections: This package contains the interfaces and utilities shared across all the subpackages of this component.
org.apache.commons.collections.bag: This package contains implementations of the `Bag` and `SortedBag` interfaces.
org.apache.commons.collections.bidimap: This package contains implementations of the `BidiMap`, `OrderedBidiMap` and `SortedBidiMap` interfaces.
org.apache.commons.collections.buffer: This package contains implementations of the `Buffer` interface.
org.apache.commons.collections.collection: This package contains implementations of the `Collection` interface.
org.apache.commons.collections.comparators: This package contains implementations of the `Comparator` interface.
org.apache.commons.collections.functors: This package contains implementations of the `Closure`, `Predicate`, `Transformer` and `Factory` interfaces.
org.apache.commons.collections.iterators: This package contains implementations of the `Iterator` interface.
org.apache.commons.collections.keyvalue: This package contains implementations of collection and map related key/value classes.
org.apache.commons.collections.list: This package contains implementations of the `List` interface.
org.apache.commons.collections.map: This package contains implementations of the `Map`, `IterableMap`, `OrderedMap` and `SortedMap` interfaces.
org.apache.commons.collections.set: This package contains implementations of the `Set` and `SortedSet` interfaces.

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