Uses of Package
java.util

Packages that use java.util

Package	Description
java.beans
java.lang
java.util

Classes in java.util used by java.beans

Class and Description
EventListener A tagging interface that all event listener interfaces must extend.
EventListenerProxy An abstract wrapper class for an EventListener class which associates a set of additional parameters with the listener.
EventObject The root class from which all event state objects shall be derived.

Classes in java.util used by java.lang

Class and Description
Comparator A comparison function, which imposes a total ordering on some collection of objects.
Enumeration An object that implements the Enumeration interface generates a series of elements, one at a time.
Iterator An iterator over a collection.

Classes in java.util used by java.util

Class and Description
AbstractCollection This class provides a skeletal implementation of the Collection interface, to minimize the effort required to implement this interface.
AbstractList 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 This class provides a skeletal implementation of the Map interface, to minimize the effort required to implement this interface.
AbstractQueue This class provides skeletal implementations of some Queue operations.
AbstractSequentialList 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 This class provides a skeletal implementation of the Set interface to minimize the effort required to implement this interface.
ArrayDeque Resizable-array implementation of the Deque interface.
ArrayList Resizable-array implementation of the List interface.
Collection The root interface in the collection hierarchy.
Comparator A comparison function, which imposes a total ordering on some collection of objects.
Deque A linear collection that supports element insertion and removal at both ends.
Dictionary The Dictionary class is the abstract parent of any class, such as Hashtable, which maps keys to values.
Enumeration An object that implements the Enumeration interface generates a series of elements, one at a time.
EventListener A tagging interface that all event listener interfaces must extend.
HashMap Hash table based implementation of the Map interface.
Iterator An iterator over a collection.
List An ordered collection (also known as a sequence).
ListIterator An iterator for lists that allows the programmer to traverse the list in either direction, modify the list during iteration, and obtain the iterator's current position in the list.
Map An object that maps keys to values.
Map.Entry A map entry (key-value pair).
PriorityQueue An unbounded priority queue based on a priority heap.
Queue A collection designed for holding elements prior to processing.
Random An instance of this class is used to generate a stream of pseudorandom numbers.
RandomAccess Marker interface used by List implementations to indicate that they support fast (generally constant time) random access.
ServiceLoader A simple service-provider loading facility.
Set A collection that contains no duplicate elements.
SortedMap A Map that further provides a total ordering on its keys.
SortedSet A Set that further provides a total ordering on its elements.
Vector The Vector class implements a growable array of objects.