Package org.apache.commons.collections4.iterators

package org.apache.commons.collections4.iterators

Implements the Iterator interface.

You may also consider using IteratorUtils, which is a single class that uses static methods to construct instances of the classes in this package.

Related Packages

Package	Description
org.apache.commons.collections4	Interfaces and utilities shared across all packages.

Class	Description
AbstractEmptyMapIterator<K,V>	Provides an implementation of an empty map iterator.
AbstractIteratorDecorator<E>	Provides basic behavior for decorating an iterator with extra functionality.
AbstractListIteratorDecorator<E>	Provides basic behavior for decorating a list iterator with extra functionality.
AbstractMapIteratorDecorator<K,V>	Provides basic behavior for decorating a map iterator with extra functionality.
AbstractOrderedMapIteratorDecorator<K,V>	Provides basic behavior for decorating an ordered map iterator with extra functionality.
AbstractUntypedIteratorDecorator<I,O>	Provides basic behavior for decorating an iterator with extra functionality without committing the generic type of the Iterator implementation.
ArrayIterator<E>	Implements an Iterator over any array.
ArrayListIterator<E>	Implements a ListIterator over an array.
BoundedIterator<E>	Decorates another iterator to return elements in a specific range.
CartesianProductIterator<E>	This iterator creates a Cartesian product of the input iterables, equivalent to nested for-loops.
CollatingIterator<E>	Provides an ordered iteration over the elements contained in a collection of ordered Iterators.
EmptyIterator<E>	Provides an implementation of an empty iterator.
EmptyListIterator<E>	Provides an implementation of an empty list iterator.
EmptyMapIterator<K,V>	Provides an implementation of an empty map iterator.
EmptyOrderedIterator<E>	Provides an implementation of an empty ordered iterator.
EmptyOrderedMapIterator<K,V>	Provides an implementation of an empty ordered map iterator.
EntrySetMapIterator<K,V>	Implements a MapIterator using a Map entrySet.
EnumerationIterator<E>	Adapter to make Enumeration instances appear to be Iterator instances.
ExtendedIterator<T>	Extends Iterator functionality to include operations commonly found on streams (e.g. filtering, concatenating, mapping).
FilterIterator<E>	Decorates an Iterator using an optional predicate to filter elements.
FilterListIterator<E>	Decorates another ListIterator using a predicate to filter elements.
IteratorChain<E>	An IteratorChain is an Iterator that wraps a number of Iterators.
IteratorEnumeration<E>	Adapter to make an Iterator instance appear to be an Enumeration instance.
IteratorIterable<E>	Adapter to make an Iterator instance appear to be an Iterable instance.
IteratorOperations<E>	Extends Iterator with additional default methods.
LazyIteratorChain<E>	An LazyIteratorChain is an Iterator that wraps a number of Iterators in a lazy manner.
ListIteratorWrapper<E>	Converts an Iterator into a ResettableListIterator.
LoopingIterator<E>	An Iterator that restarts when it reaches the end.
LoopingListIterator<E>	A ListIterator that restarts when it reaches the end or when it reaches the beginning.
NodeListIterator	An Iterator over a NodeList.
ObjectArrayIterator<E>	An Iterator over an array of objects.
ObjectArrayListIterator<E>	Implements a ListIterator over an array of objects.
ObjectGraphIterator<E>	An Iterator that can traverse multiple iterators down an object graph.
PeekingIterator<E>	Decorates an iterator to support one-element lookahead while iterating.
PermutationIterator<E>	This iterator creates permutations of an input collection, using the Steinhaus-Johnson-Trotter algorithm (also called plain changes).
PushbackIterator<E>	Decorates an iterator to support pushback of elements.
ReverseListIterator<E>	Iterates backwards through a List, starting with the last element and continuing to the first.
SingletonIterator<E>	SingletonIterator is an Iterator over a single object instance.
SingletonListIterator<E>	SingletonIterator is an ListIterator over a single object instance.
SkippingIterator<E>	Decorates another iterator to skip the first N elements.
TransformIterator<I,O>	Decorates an iterator such that each element returned is transformed.
UniqueFilterIterator<E>	A FilterIterator which only returns "unique" Objects.
UnmodifiableIterator<E>	Decorates an iterator such that it cannot be modified.
UnmodifiableListIterator<E>	Decorates a list iterator such that it cannot be modified.
UnmodifiableMapIterator<K,V>	Decorates a map iterator such that it cannot be modified.
UnmodifiableOrderedMapIterator<K,V>	Decorates an ordered map iterator such that it cannot be modified.
ZippingIterator<E>	Provides an interleaved iteration over the elements contained in a collection of Iterators.