Apache Commons Collections 4.4 · org.apache.commons.collections4

Interface Summary

Modifier and Type	Interface and Description
public interface	Bag< the type of elements in this bag E> Defines a collection that counts the number of times an object appears in the collection.
public interface	BidiMap< the type of the keys in the map K, the type of the values in the map V> Defines a map that allows bidirectional lookup between key and values.
public interface	BoundedCollection< the type of elements in this collection E> Defines a collection that is bounded in size.
public interface	BoundedMap< the type of the keys in this map K, the type of the values in this map V> Defines a map that is bounded in size.
public interface	Closure< the type that the closure acts on T> Defines a functor interface implemented by classes that do something.
public interface	Equator< the types of object this `Equator` can evaluate. T> An equation function, which determines equality between objects of type T.
public interface	Factory< the type that the factory creates T> Defines a functor interface implemented by classes that create objects.
public interface	Get< the type of the keys in this map K, the type of the values in this map V> The "read" subset of the `java.util.Map` interface.
public interface	IterableGet< the type of the keys in this map K, the type of the values in this map V> The "read" subset of the `java.util.Map` interface.
public interface	IterableMap< the type of the keys in this map K, the type of the values in this map V> Defines a map that can be iterated directly without needing to create an entry set.
public interface	IterableSortedMap< the type of the keys in the map K, the type of the values in the map V> `SortedMap` + `OrderedMap`.
public interface	KeyValue< the type of the key K, the type of the value V> Defines a simple key value pair.
public interface	ListValuedMap< the type of the keys in this map K, the type of the values in this map V> Defines a map that holds a list of values against each key.
public interface	MapIterator< the type of the keys in the map K, the type of the values in the map V> Defines an iterator that operates over a `Map`.
public interface	MultiMap< the type of the keys in this map K, the type of the values in this map V> Deprecated since 4.1, use `MultiValuedMap` instead Defines a map that holds a collection of values against each key.
public interface	MultiSet< the type held in the multiset E> Defines a collection that counts the number of times an object appears in the collection.
public interface	MultiValuedMap< the type of the keys in this map K, the type of the values in this map V> Defines a map that holds a collection of values against each key.
public interface	OrderedBidiMap< the type of the keys in the map K, the type of the values in the map V> Defines a map that allows bidirectional lookup between key and values and retains and provides access to an ordering.
public interface	OrderedIterator< the type of elements returned by this iterator E> Defines an iterator that operates over an ordered container.
public interface	OrderedMap< the type of the keys in the map K, the type of the values in the map V> Defines a map that maintains order and allows both forward and backward iteration through that order.
public interface	OrderedMapIterator< the type of the keys in the map K, the type of the values in the map V> Defines an iterator that operates over an ordered `Map`.
public interface	Predicate< the type that the predicate queries T> Defines a functor interface implemented by classes that perform a predicate test on an object.
public interface	Put< the type of the keys in this map K, the type of the values in this map V> The "write" subset of the `Map` interface.
public interface	ResettableIterator< the type of elements returned by this iterator E> Defines an iterator that can be reset back to an initial state.
public interface	ResettableListIterator< the type of elements returned by this iterator E> Defines a list iterator that can be reset back to an initial state.
public interface	SetValuedMap< the type of the keys in this map K, the type of the values in this map V> Defines a map that holds a set of values against each key.
public interface	SortedBag< the type of elements in this bag E> Defines a type of `Bag` that maintains a sorted order among its unique representative members.
public interface	SortedBidiMap< the type of the keys in the map K, the type of the values in the map V> Defines a map that allows bidirectional lookup between key and values and retains both keys and values in sorted order.
public interface	Transformer< the input type to the transformer I, the output type from the transformer O> Defines a functor interface implemented by classes that transform one object into another.
public interface	Trie< the type of the keys in this map K, the type of the values in this map V> Defines the interface for a prefix tree, an ordered tree data structure.
public interface	Unmodifiable Marker interface for collections, maps and iterators that are unmodifiable.

Class Summary

Modifier and Type	Class and Description
public class	ArrayStack< the type of elements in this list E> Deprecated use `java.util.ArrayDeque` instead (available from Java 1.6) An implementation of the `java.util.Stack` API that is based on an `ArrayList` instead of a `Vector`, so it is not synchronized to protect against multi-threaded access.
pack-priv class	ArrayUtils Operations on arrays, primitive arrays (like `int[]`) and primitive wrapper arrays (like `Integer[]`).
public class	BagUtils Provides utility methods and decorators for `Bag` and `SortedBag` instances.
public class	ClosureUtils `ClosureUtils` provides reference implementations and utilities for the Closure functor interface.
public class	CollectionUtils Provides utility methods and decorators for `Collection` instances.
public class	ComparatorUtils Provides convenient static utility methods for `Comparator` objects.
public class	EnumerationUtils Provides utility methods for `Enumeration` instances.
public class	FactoryUtils `FactoryUtils` provides reference implementations and utilities for the Factory functor interface.
public class	FluentIterable< the element type E> A FluentIterable provides a powerful yet simple API for manipulating Iterable instances in a fluent manner.
public class	FunctorException Runtime exception thrown from functors.
public class	IterableUtils Provides utility methods and decorators for `Iterable` instances.
public class	IteratorUtils Provides static utility methods and decorators for `Iterator` instances.
public class	ListUtils Provides utility methods and decorators for `List` instances.
public class	MapUtils Provides utility methods and decorators for `Map` and `SortedMap` instances.
public class	MultiMapUtils Provides utility methods and decorators for `MultiValuedMap` instances.
public class	MultiSetUtils Provides utility methods and decorators for `MultiSet` instances.
public class	PredicateUtils `PredicateUtils` provides reference implementations and utilities for the Predicate functor interface.
public class	QueueUtils Provides utility methods and decorators for `Queue` instances.
public class	SetUtils Provides utility methods and decorators for `Set` and `SortedSet` instances.
public class	SplitMapUtils Utilities for working with "split maps:" objects that implement `Put` and/or `Get` but not `Map`.
public class	TransformerUtils `TransformerUtils` provides reference implementations and utilities for the Transformer functor interface.
public class	TrieUtils A collection of `Trie` utilities.

Package org.apache.commons.collections4

Interface Summary

Class Summary