Package java.util

Interface Summary

Collection<E>	The root interface in the collection hierarchy.
Iterator<E>	An iterator over a collection.
List<E>	An ordered collection (also known as a sequence).
Map<K,V>	An object that maps keys to values.
Map.Entry<K,V>	A map entry (key-value pair).
Queue<E>	A collection designed for holding elements prior to processing.
Set<E>	A collection that contains no duplicate elements.

Class Summary

AbstractCollection<E>	This class provides a skeletal implementation of the Collection interface, to minimize the effort required to implement this interface.
AbstractList<E>	This class provides a skeletal implementation of the List interface to minimize the effort required to implement this interface backed by a "random access" data store (such as an array).
AbstractMap<K,V>	This class provides a skeletal implementation of the Map interface, to minimize the effort required to implement this interface.
AbstractQueue<E>	This class provides skeletal implementations of some Queue operations.
AbstractSequentialList<E>	This class provides a skeletal implementation of the List interface to minimize the effort required to implement this interface backed by a "sequential access" data store (such as a linked list).
AbstractSet<E>	This class provides a skeletal implementation of the Set interface to minimize the effort required to implement this interface.
LinkedList<E>	Linked list implementation of the List interface.
PriorityQueue<E>	An unbounded priority queue based on a priority heap.