Uses of Package
java.util

Packages that use java.util

java.awt	Contains all of the classes for creating user interfaces and for painting graphics and images.
java.awt.dnd	Drag and Drop is a direct manipulation gesture found in many Graphical User Interface systems that provides a mechanism to transfer information between two entities logically associated with presentation elements in the GUI.
java.awt.event	Provides interfaces and classes for dealing with different types of events fired by AWT components.
java.beans	Contains classes related to developing beans -- components based on the JavaBeansTM architecture.
java.beans.beancontext	Provides classes and interfaces relating to bean context.
java.security	Provides the classes and interfaces for the security framework.
java.sql	Provides the API for accessing and processing data stored in a data source (usually a relational database) using the JavaTM programming language.
java.text	Provides classes and interfaces for handling text, dates, numbers, and messages in a manner independent of natural languages.
java.util	Contains the collections framework, legacy collection classes, event model, date and time facilities, internationalization, and miscellaneous utility classes (a string tokenizer, a random-number generator, and a bit array).
java.util.jar	Provides classes for reading and writing the JAR (Java ARchive) file format, which is based on the standard ZIP file format with an optional manifest file.
java.util.prefs	This package allows applications to store and retrieve user and system preference and configuration data.
javax.accessibility	Defines a contract between user-interface components and an assistive technology that provides access to those components.
javax.imageio.event	A package of the Java Image I/O API dealing with synchronous notification of events during the reading and writing of images.
javax.naming	Provides the classes and interfaces for accessing naming services.
javax.naming.event	Provides support for event notification when accessing naming and directory services.
javax.naming.ldap	Provides support for LDAPv3 extended operations and controls.
javax.net.ssl	Provides classes for the secure socket package.
javax.print.attribute.standard	Package javax.print.attribute.standard contains classes for specific printing attributes.
javax.print.event	Package javax.print.event contains event classes and listener interfaces.
javax.sound.midi	Provides interfaces and classes for I/O, sequencing, and synthesis of MIDI (Musical Instrument Digital Interface) data.
javax.sound.sampled	Provides interfaces and classes for capture, processing, and playback of sampled audio data.
javax.sql	Provides the API for server side data source access and processing from the JavaTM programming language.
javax.swing	Provides a set of "lightweight" (all-Java language) components that, to the maximum degree possible, work the same on all platforms.
javax.swing.event	Provides for events fired by Swing components.
javax.swing.plaf.basic	Provides user interface objects built according to the Basic look and feel.
javax.swing.plaf.metal	Provides user interface objects built according to the Java look and feel (once codenamed Metal), which is the default look and feel.
javax.swing.table	Provides classes and interfaces for dealing with javax.swing.JTable.
javax.swing.text	Provides classes and interfaces that deal with editable and noneditable text components.
javax.swing.text.html	Provides the class HTMLEditorKit and supporting classes for creating HTML text editors.
javax.swing.tree	Provides classes and interfaces for dealing with javax.swing.JTree.
javax.swing.undo	Allows developers to provide support for undo/redo in applications such as text editors.

Classes in java.util used by java.awt

EmptyStackException
Thrown by methods in the Stack class to indicate that the stack is empty.

EventListener
A tagging interface that all event listener interfaces must extend.

EventObject
The root class from which all event state objects shall be derived.

Map
An object that maps keys to values.

Classes in java.util used by java.awt.dnd

EventListener
A tagging interface that all event listener interfaces must extend.

EventObject
The root class from which all event state objects shall be derived.

TooManyListenersException
The TooManyListenersException Exception is used as part of the Java Event model to annotate and implement a unicast special case of a multicast Event Source.

Classes in java.util used by java.awt.event

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.beans

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.beans.beancontext

Collection
The root interface in the collection hierarchy.

EventListener
A tagging interface that all event listener interfaces must extend.

EventObject
The root class from which all event state objects shall be derived.

Iterator
An iterator over a collection.

TooManyListenersException
The TooManyListenersException Exception is used as part of the Java Event model to annotate and implement a unicast special case of a multicast Event Source.

Classes in java.util used by java.security

Dictionary
The Dictionary class is the abstract parent of any class, such as Hashtable, which maps keys to values.

Hashtable
This class implements a hashtable, which maps keys to values.

Map
An object that maps keys to values.

Properties
The Properties class represents a persistent set of properties.

Random
An instance of this class is used to generate a stream of pseudorandom numbers.

Classes in java.util used by java.sql

Date
The class Date represents a specific instant in time, with millisecond precision.

Classes in java.util used by java.text

Comparator
A comparison function, which imposes a total ordering on some collection of objects.

Classes in java.util used by java.util

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.

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.

Calendar
Calendar is an abstract base class for converting between a Date object and a set of integer fields such as YEAR, MONTH, DAY, HOUR, and so on.

Collection
The root interface in the collection hierarchy.

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.

HashSet
This class implements the Set interface, backed by a hash table (actually a HashMap instance).

Hashtable
This class implements a hashtable, which maps keys to values.

Iterator
An iterator over a collection.

List
An ordered collection (also known as a sequence).

Map
An object that maps keys to values.

MissingResourceException
Signals that a resource is missing.

RandomAccess
Marker interface used by List implementations to indicate that they support fast (generally constant time) random access.

ResourceBundle
Resource bundles contain locale-specific objects.

Set
A collection that contains no duplicate elements.

SortedMap
A map that further guarantees that it will be in ascending key order, sorted according to the natural ordering of its keys (see the Comparable interface), or by a comparator provided at sorted map creation time.

SortedSet
A set that further guarantees that its iterator will traverse the set in ascending element order, sorted according to the natural ordering of its elements (see Comparable), or by a Comparator provided at sorted set creation time.

TimeZone
TimeZone represents a time zone offset, and also figures out daylight savings.

Vector
The Vector class implements a growable array of objects.

Classes in java.util used by java.util.jar

Map
An object that maps keys to values.

Classes in java.util used by java.util.prefs

EventListener
A tagging interface that all event listener interfaces must extend.

EventObject
The root class from which all event state objects shall be derived.

Classes in java.util used by javax.accessibility

ListResourceBundle
ListResourceBundle is an abstract subclass of ResourceBundle that manages resources for a locale in a convenient and easy to use list.

ResourceBundle
Resource bundles contain locale-specific objects.

Classes in java.util used by javax.imageio.event

EventListener
A tagging interface that all event listener interfaces must extend.

Classes in java.util used by javax.naming

Enumeration
An object that implements the Enumeration interface generates a series of elements, one at a time.

Classes in java.util used by javax.naming.event

EventListener
A tagging interface that all event listener interfaces must extend.

EventObject
The root class from which all event state objects shall be derived.

Classes in java.util used by javax.naming.ldap

EventListener
A tagging interface that all event listener interfaces must extend.

EventObject
The root class from which all event state objects shall be derived.

Classes in java.util used by javax.net.ssl

EventListener
A tagging interface that all event listener interfaces must extend.

EventObject
The root class from which all event state objects shall be derived.

Classes in java.util used by javax.print.attribute.standard

AbstractCollection
This class provides a skeletal implementation of the Collection interface, to minimize the effort required to implement this interface.

AbstractMap
This class provides a skeletal implementation of the Map interface, to minimize the effort required to implement this interface.

AbstractSet
This class provides a skeletal implementation of the Set interface to minimize the effort required to implement this interface.

Collection
The root interface in the collection hierarchy.

HashMap
Hash table based implementation of the Map interface.

HashSet
This class implements the Set interface, backed by a hash table (actually a HashMap instance).

Map
An object that maps keys to values.

Set
A collection that contains no duplicate elements.

Classes in java.util used by javax.print.event

EventObject
The root class from which all event state objects shall be derived.

Classes in java.util used by javax.sound.midi

EventListener
A tagging interface that all event listener interfaces must extend.

Classes in java.util used by javax.sound.sampled

EventListener
A tagging interface that all event listener interfaces must extend.

EventObject
The root class from which all event state objects shall be derived.

Classes in java.util used by javax.sql

EventListener
A tagging interface that all event listener interfaces must extend.

EventObject
The root class from which all event state objects shall be derived.

Classes in java.util used by javax.swing

Dictionary
The Dictionary class is the abstract parent of any class, such as Hashtable, which maps keys to values.

EventListener
A tagging interface that all event listener interfaces must extend.

Hashtable
This class implements a hashtable, which maps keys to values.

Map
An object that maps keys to values.

Classes in java.util used by javax.swing.event

EventListener
A tagging interface that all event listener interfaces must extend.

EventObject
The root class from which all event state objects shall be derived.

Classes in java.util used by javax.swing.plaf.basic

EventListener
A tagging interface that all event listener interfaces must extend.

Classes in java.util used by javax.swing.plaf.metal

EventListener
A tagging interface that all event listener interfaces must extend.

Classes in java.util used by javax.swing.table

EventListener
A tagging interface that all event listener interfaces must extend.

Classes in java.util used by javax.swing.text

EventListener
A tagging interface that all event listener interfaces must extend.

Classes in java.util used by javax.swing.text.html

EventListener
A tagging interface that all event listener interfaces must extend.

EventObject
The root class from which all event state objects shall be derived.

Classes in java.util used by javax.swing.tree

EventListener
A tagging interface that all event listener interfaces must extend.

Classes in java.util used by javax.swing.undo

EventListener
A tagging interface that all event listener interfaces must extend.