Uses of Package
java.util

Packages that use java.util

com.sun.jndi.ldap
com.sun.jndi.ldap.sasl
com.sun.jndi.toolkit.corba
com.sun.jndi.toolkit.ctx
com.sun.jndi.toolkit.dir
com.sun.jndi.toolkit.url
com.sun.jndi.url.ldap
com.sun.naming.internal
java.applet	Classes and interfaces for small embeddable applications often used in web pages.
java.awt	Abstract Window Toolkit classes.
java.awt.event	Listeners and adapters for different kinds of AWT events.
java.awt.image	Image consumers, producers and filters.
java.beans	Listeners and descriptors for managing beans.
java.beans.beancontext	Containers and execution environments for beans.
java.io	Classes for manipulating character and byte streams and files.
java.lang	Core classes including wrappers for primitive types, classes, packages and class loaders, representations of the system, processes, threads and the core exception hierarchy.
java.lang.management	A series of management beans which provide access to information about the virtual machine and its underlying operating system.
java.math	Provides classes for performing arbitrary-precision integer arithmetic (BigInteger) and arbitrary-precision decimal arithmetic (BigDecimal).
java.net	Network communication through TCP and UDP sockets or URLs.
java.nio.channels	Classes for creating, selecting and non-blocking reading and writing of buffers from files and sockets.
java.nio.channels.spi	Utility classes and interfaces for implementing channels.
java.nio.charset	Classes to manipulate, encode and decode different character sets from and to bytes.
java.nio.charset.spi	Classes to provide new character sets.
java.rmi.activation	In the previous Classpath releases, an instance of a UnicastRemoteObject could be accessed from a server that: has created an instance of that object has been running all the time The the activation system allows to activate and execute the object implementation on demand rather than running all time.
java.security
java.security.acl
java.security.cert
java.sql	Interfaces and classes to connect to a database and wrappers for data in the database and result queries.
java.text	Classes to iterate over strings and to format texts according to a specific locale.
java.text.spi
java.util	Utility classes such as collections (maps, sets, lists, dictionaries and stacks), calendars, dates, locales, properties, timers, resource bundles and event objects.
java.util.concurrent	Utility classes commonly useful in concurrent programming.
java.util.concurrent.locks	Interfaces and classes providing a framework for locking and waiting for conditions that is distinct from built-in synchronization and monitors.
java.util.jar	Utility classes for manipulating java archives (zip files with a manifest file with attributes).
java.util.logging	Utility classes for logging events.
java.util.prefs	Utility classes for storing and retrieving user and system preferences.
java.util.spi
java.util.zip	Provides classes for reading and writing the standard ZIP and GZIP file formats.
javax.management
javax.management.openmbean	Provides the data types and descriptor classes for the Open MBeans.
javax.naming	Provides the classes and interfaces for accessing naming services.
javax.naming.directory	Extends the javax.naming package to provide functionality for accessing directory 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.naming.spi	Provides the means for dynamically plugging in support for accessing naming and directory services through the javax.naming and related packages.
javax.net.ssl
javax.print.attribute	Provides classes and interfaces describing the roles and syntax of attribute objects in the Java Print Service API.
javax.print.attribute.standard	Provides the printing attribute classes of the Java Print Service API.
javax.print.event	Provides events and listeners to be used with the Java Print Service API.
javax.realtime
javax.security.auth
javax.security.auth.callback
javax.security.auth.kerberos
javax.security.auth.login
javax.security.auth.spi
javax.security.sasl
javax.sound.midi
javax.sound.sampled
javax.sql
javax.xml.datatype	This package provides type mappings between XML and Java data types.
javax.xml.namespace	XML Namespace processing.
javax.xml.stream
javax.xml.stream.events
javax.xml.stream.util
javax.xml.transform	Base "TRAX" API for XSLT transformers.
javax.xml.xpath	This package provides access to an XPath evaluation environment and expressions.
org.omg.CORBA	This package provides the support of CORBA; see overview of the implemented functionality.
org.xml.sax	This package provides the core SAX APIs.
org.xml.sax.helpers	This package contains "helper" classes, including support for bootstrapping SAX-based applications.
sun.misc
sun.reflect.annotation
sun.reflect.generics.tree
sun.util
sun.util.resources

Classes in java.util used by com.sun.jndi.ldap

Enumeration
Interface for lists of objects that can be returned in sequence.

Hashtable
A class which implements a hashtable data structure.

Classes in java.util used by com.sun.jndi.ldap.sasl

Hashtable
A class which implements a hashtable data structure.

Classes in java.util used by com.sun.jndi.toolkit.corba

Hashtable
A class which implements a hashtable data structure.

Classes in java.util used by com.sun.jndi.toolkit.ctx

Hashtable
A class which implements a hashtable data structure.

Classes in java.util used by com.sun.jndi.toolkit.dir

Enumeration
Interface for lists of objects that can be returned in sequence.

Hashtable
A class which implements a hashtable data structure.

Classes in java.util used by com.sun.jndi.toolkit.url

Hashtable
A class which implements a hashtable data structure.

Classes in java.util used by com.sun.jndi.url.ldap

Hashtable
A class which implements a hashtable data structure.

Classes in java.util used by com.sun.naming.internal

Hashtable
A class which implements a hashtable data structure.

Classes in java.util used by java.applet

Enumeration
Interface for lists of objects that can be returned in sequence.

Iterator
An object which iterates over a collection.

Locale
Locales represent a specific country and culture.

Classes in java.util used by java.awt

Collection
Interface that represents a collection of objects.

EmptyStackException
This exception is thrown by the Stack class when an attempt is made to pop or otherwise access elements from an empty stack.

Enumeration
Interface for lists of objects that can be returned in sequence.

EventListener
Empty interface that is implemented by classes that need to receive events.

EventObject
Represents Events fired by Objects.

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

Locale
Locales represent a specific country and culture.

Map
An object that maps keys onto values.

Map.Entry
A map entry (key-value pair).

Properties
A set of persistent properties, which can be saved or loaded from a stream.

ResourceBundle
A resource bundle contains locale-specific data.

Set
A collection that contains no duplicates.

WeakHashMap
A weak hash map has only weak references to the key.

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

EventListener
Empty interface that is implemented by classes that need to receive events.

EventListenerProxy
An abstract wrapper for event listeners.

EventObject
Represents Events fired by Objects.

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

Hashtable
A class which implements a hashtable data structure.

Vector
The Vector classes implements growable arrays of Objects.

Classes in java.util used by java.beans

Enumeration
Interface for lists of objects that can be returned in sequence.

EventListener
Empty interface that is implemented by classes that need to receive events.

EventListenerProxy
An abstract wrapper for event listeners.

EventObject
Represents Events fired by Objects.

Classes in java.util used by java.beans.beancontext

ArrayList
An array-backed implementation of the List interface.

Collection
Interface that represents a collection of objects.

EventListener
Empty interface that is implemented by classes that need to receive events.

EventObject
Represents Events fired by Objects.

HashMap
This class provides a hashtable-backed implementation of the Map interface.

Iterator
An object which iterates over a collection.

Locale
Locales represent a specific country and culture.

TooManyListenersException
This exception is part of the java event model.

Classes in java.util used by java.io

Enumeration
Interface for lists of objects that can be returned in sequence.

Locale
Locales represent a specific country and culture.

Classes in java.util used by java.lang

Comparator
Interface for objects that specify an ordering between objects.

Enumeration
Interface for lists of objects that can be returned in sequence.

Iterator
An object which iterates over a collection.

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

Locale
Locales represent a specific country and culture.

Map
An object that maps keys onto values.

Properties
A set of persistent properties, which can be saved or loaded from a stream.

Classes in java.util used by java.lang.management

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

Map
An object that maps keys onto values.

Classes in java.util used by java.math

Random
This class generates pseudorandom numbers.

Classes in java.util used by java.net

Enumeration
Interface for lists of objects that can be returned in sequence.

Map
An object that maps keys onto values.

Classes in java.util used by java.nio.channels

Set
A collection that contains no duplicates.

Classes in java.util used by java.nio.channels.spi

Set
A collection that contains no duplicates.

Classes in java.util used by java.nio.charset

Locale
Locales represent a specific country and culture.

Set
A collection that contains no duplicates.

SortedMap
A map which guarantees its key's iteration order.

Classes in java.util used by java.nio.charset.spi

Iterator
An object which iterates over a collection.

Classes in java.util used by java.rmi.activation

Properties
A set of persistent properties, which can be saved or loaded from a stream.

Classes in java.util used by java.security

Date
This class represents a specific time in milliseconds since the epoch.

Dictionary
A Dictionary maps keys to values; how it does that is implementation-specific.

Enumeration
Interface for lists of objects that can be returned in sequence.

Hashtable
A class which implements a hashtable data structure.

Map
An object that maps keys onto values.

Properties
A set of persistent properties, which can be saved or loaded from a stream.

Random
This class generates pseudorandom numbers.

Set
A collection that contains no duplicates.

Classes in java.util used by java.security.acl

Enumeration
Interface for lists of objects that can be returned in sequence.

Classes in java.util used by java.security.cert

Collection
Interface that represents a collection of objects.

Date
This class represents a specific time in milliseconds since the epoch.

Iterator
An object which iterates over a collection.

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

Set
A collection that contains no duplicates.

Classes in java.util used by java.sql

Calendar
This class is an abstract base class for Calendars, which can be used to convert between Date objects and a set of integer fields which represent YEAR, MONTH, DAY, etc.

Date
This class represents a specific time in milliseconds since the epoch.

Enumeration
Interface for lists of objects that can be returned in sequence.

Map
An object that maps keys onto values.

Properties
A set of persistent properties, which can be saved or loaded from a stream.

Classes in java.util used by java.text

Calendar
This class is an abstract base class for Calendars, which can be used to convert between Date objects and a set of integer fields which represent YEAR, MONTH, DAY, etc.

Comparator
Interface for objects that specify an ordering between objects.

Currency
Representation of a currency for a particular locale.

Date
This class represents a specific time in milliseconds since the epoch.

Locale
Locales represent a specific country and culture.

Map
An object that maps keys onto values.

MissingResourceException
This exception is thrown when a resource is missing.

Set
A collection that contains no duplicates.

TimeZone
This class represents a time zone offset and handles daylight savings.

Classes in java.util used by java.text.spi

Locale
Locales represent a specific country and culture.

Classes in java.util used by java.util

AbstractCollection
A basic implementation of most of the methods in the Collection interface to make it easier to create a collection.

AbstractList
A basic implementation of most of the methods in the List interface to make it easier to create a List based on a random-access data structure.

AbstractMap
An abstract implementation of Map to make it easier to create your own implementations.

AbstractQueue
This class provides skeletal implementations of some Queue operations.

AbstractSequentialList
Abstract superclass to make it easier to implement the List interface when backed by a sequential-access store, such as a linked list.

AbstractSet
An abstract implementation of Set to make it easier to create your own implementations.

ArrayDeque
Resizable-array implementation of the Deque interface.

ArrayList
An array-backed implementation of the List interface.

BitSet
This class can be thought of in two ways.

Calendar
This class is an abstract base class for Calendars, which can be used to convert between Date objects and a set of integer fields which represent YEAR, MONTH, DAY, etc.

Collection
Interface that represents a collection of objects.

Comparator
Interface for objects that specify an ordering between objects.

Currency
Representation of a currency for a particular locale.

Date
This class represents a specific time in milliseconds since the epoch.

Deque
A linear collection that supports element insertion and removal at both ends.

Dictionary
A Dictionary maps keys to values; how it does that is implementation-specific.

Enumeration
Interface for lists of objects that can be returned in sequence.

EnumMap

EnumSet
Provides an efficient mechanism for recording a set of enumeration constants.

EventListener
Empty interface that is implemented by classes that need to receive events.

Formatter
An interpreter for printf-style format strings.

Formatter.BigDecimalLayoutForm

HashMap
This class provides a hashtable-backed implementation of the Map interface.

HashSet
This class provides a HashMap-backed implementation of the Set interface.

Hashtable
A class which implements a hashtable data structure.

IllegalFormatException
A general exception thrown when a format string is supplied to a Formatter that contains either invalid syntax or a mismatch between the format specification and the supplied arguments.

InvalidPropertiesFormatException

Iterator
An object which iterates over a collection.

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

ListIterator
An extended version of Iterator to support the extra features of Lists.

Locale
Locales represent a specific country and culture.

Map
An object that maps keys onto values.

Map.Entry
A map entry (key-value pair).

NavigableMap
A SortedMap extended with navigation methods returning the closest matches for given search targets.

NavigableSet
A SortedSet extended with navigation methods reporting closest matches for given search targets.

NoSuchElementException
Exception thrown when an attempt is made to access an element that does not exist.

Observable
This class represents an object which is observable.

Observer
Interface that is implemented when a class wants to be informed of changes in Observable objects.

PriorityQueue

Properties
A set of persistent properties, which can be saved or loaded from a stream.

Queue
A collection designed for holding elements prior to processing.

Random
This class generates pseudorandom numbers.

RandomAccess
Marker interface used to inform List implementations that they support fast (usually constant time) random access.

ResourceBundle
A resource bundle contains locale-specific data.

ServiceLoader
A simple service-provider loading facility.

Set
A collection that contains no duplicates.

SortedMap
A map which guarantees its key's iteration order.

SortedSet
A set which guarantees its iteration order.

TimerTask
A task that can be scheduled for one-time or repeated execution by a Timer.

TimeZone
This class represents a time zone offset and handles daylight savings.

UUID
This class represents a 128-bit UUID value.

Vector
The Vector classes implements growable arrays of Objects.

Classes in java.util used by java.util.concurrent

AbstractCollection
A basic implementation of most of the methods in the Collection interface to make it easier to create a collection.

AbstractMap
An abstract implementation of Map to make it easier to create your own implementations.

AbstractQueue
This class provides skeletal implementations of some Queue operations.

AbstractSet
An abstract implementation of Set to make it easier to create your own implementations.

Collection
Interface that represents a collection of objects.

Comparator
Interface for objects that specify an ordering between objects.

Deque
A linear collection that supports element insertion and removal at both ends.

Enumeration
Interface for lists of objects that can be returned in sequence.

Iterator
An object which iterates over a collection.

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

ListIterator
An extended version of Iterator to support the extra features of Lists.

Map
An object that maps keys onto values.

Map.Entry
A map entry (key-value pair).

NavigableMap
A SortedMap extended with navigation methods returning the closest matches for given search targets.

NavigableSet
A SortedSet extended with navigation methods reporting closest matches for given search targets.

Queue
A collection designed for holding elements prior to processing.

RandomAccess
Marker interface used to inform List implementations that they support fast (usually constant time) random access.

Set
A collection that contains no duplicates.

SortedMap
A map which guarantees its key's iteration order.

SortedSet
A set which guarantees its iteration order.

Classes in java.util used by java.util.concurrent.locks

Collection
Interface that represents a collection of objects.

Date
This class represents a specific time in milliseconds since the epoch.

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

Collection
Interface that represents a collection of objects.

Enumeration
Interface for lists of objects that can be returned in sequence.

Map
An object that maps keys onto values.

Map.Entry
A map entry (key-value pair).

Set
A collection that contains no duplicates.

Classes in java.util used by java.util.logging

Enumeration
Interface for lists of objects that can be returned in sequence.

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

MissingResourceException
This exception is thrown when a resource is missing.

ResourceBundle
A resource bundle contains locale-specific data.

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

EventListener
Empty interface that is implemented by classes that need to receive events.

EventObject
Represents Events fired by Objects.

Classes in java.util used by java.util.spi

Locale
Locales represent a specific country and culture.

Classes in java.util used by java.util.zip

Enumeration
Interface for lists of objects that can be returned in sequence.

Classes in java.util used by javax.management

AbstractCollection
A basic implementation of most of the methods in the Collection interface to make it easier to create a collection.

AbstractList
A basic implementation of most of the methods in the List interface to make it easier to create a List based on a random-access data structure.

ArrayList
An array-backed implementation of the List interface.

Collection
Interface that represents a collection of objects.

EventListener
Empty interface that is implemented by classes that need to receive events.

EventObject
Represents Events fired by Objects.

Hashtable
A class which implements a hashtable data structure.

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

RandomAccess
Marker interface used to inform List implementations that they support fast (usually constant time) random access.

Set
A collection that contains no duplicates.

Vector
The Vector classes implements growable arrays of Objects.

Classes in java.util used by javax.management.openmbean

Collection
Interface that represents a collection of objects.

Date
This class represents a specific time in milliseconds since the epoch.

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

Map
An object that maps keys onto values.

Map.Entry
A map entry (key-value pair).

Set
A collection that contains no duplicates.

Classes in java.util used by javax.naming

Enumeration
Interface for lists of objects that can be returned in sequence.

Hashtable
A class which implements a hashtable data structure.

Properties
A set of persistent properties, which can be saved or loaded from a stream.

Vector
The Vector classes implements growable arrays of Objects.

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

Hashtable
A class which implements a hashtable data structure.

Vector
The Vector classes implements growable arrays of Objects.

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

EventListener
Empty interface that is implemented by classes that need to receive events.

EventObject
Represents Events fired by Objects.

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

EventListener
Empty interface that is implemented by classes that need to receive events.

EventObject
Represents Events fired by Objects.

Hashtable
A class which implements a hashtable data structure.

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

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

Hashtable
A class which implements a hashtable data structure.

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

Enumeration
Interface for lists of objects that can be returned in sequence.

EventListener
Empty interface that is implemented by classes that need to receive events.

EventObject
Represents Events fired by Objects.

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

Date
This class represents a specific time in milliseconds since the epoch.

Locale
Locales represent a specific country and culture.

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

AbstractCollection
A basic implementation of most of the methods in the Collection interface to make it easier to create a collection.

AbstractMap
An abstract implementation of Map to make it easier to create your own implementations.

AbstractSet
An abstract implementation of Set to make it easier to create your own implementations.

Collection
Interface that represents a collection of objects.

Date
This class represents a specific time in milliseconds since the epoch.

HashMap
This class provides a hashtable-backed implementation of the Map interface.

HashSet
This class provides a HashMap-backed implementation of the Set interface.

Locale
Locales represent a specific country and culture.

Map
An object that maps keys onto values.

Set
A collection that contains no duplicates.

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

EventObject
Represents Events fired by Objects.

Classes in java.util used by javax.realtime

Date
This class represents a specific time in milliseconds since the epoch.

Classes in java.util used by javax.security.auth

Set
A collection that contains no duplicates.

Classes in java.util used by javax.security.auth.callback

Locale
Locales represent a specific country and culture.

Classes in java.util used by javax.security.auth.kerberos

Date
This class represents a specific time in milliseconds since the epoch.

Classes in java.util used by javax.security.auth.login

Map
An object that maps keys onto values.

Classes in java.util used by javax.security.auth.spi

Map
An object that maps keys onto values.

Classes in java.util used by javax.security.sasl

Enumeration
Interface for lists of objects that can be returned in sequence.

Map
An object that maps keys onto values.

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

EventListener
Empty interface that is implemented by classes that need to receive events.

Vector
The Vector classes implements growable arrays of Objects.

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

EventListener
Empty interface that is implemented by classes that need to receive events.

EventObject
Represents Events fired by Objects.

Map
An object that maps keys onto values.

Classes in java.util used by javax.sql

Calendar
This class is an abstract base class for Calendars, which can be used to convert between Date objects and a set of integer fields which represent YEAR, MONTH, DAY, etc.

EventListener
Empty interface that is implemented by classes that need to receive events.

EventObject
Represents Events fired by Objects.

Map
An object that maps keys onto values.

Classes in java.util used by javax.xml.datatype

Calendar
This class is an abstract base class for Calendars, which can be used to convert between Date objects and a set of integer fields which represent YEAR, MONTH, DAY, etc.

Date
This class represents a specific time in milliseconds since the epoch.

GregorianCalendar
This class represents the Gregorian calendar, that is used in most countries all over the world.

Locale
Locales represent a specific country and culture.

TimeZone
This class represents a time zone offset and handles daylight savings.

Classes in java.util used by javax.xml.namespace

Iterator
An object which iterates over a collection.

Classes in java.util used by javax.xml.stream

Iterator
An object which iterates over a collection.

Classes in java.util used by javax.xml.stream.events

Iterator
An object which iterates over a collection.

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

Classes in java.util used by javax.xml.stream.util

Iterator
An object which iterates over a collection.

Classes in java.util used by javax.xml.transform

Properties
A set of persistent properties, which can be saved or loaded from a stream.

Classes in java.util used by javax.xml.xpath

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

Classes in java.util used by org.omg.CORBA

Properties
A set of persistent properties, which can be saved or loaded from a stream.

Classes in java.util used by org.xml.sax

Locale
Locales represent a specific country and culture.

Classes in java.util used by org.xml.sax.helpers

Enumeration
Interface for lists of objects that can be returned in sequence.

Locale
Locales represent a specific country and culture.

Classes in java.util used by sun.misc

AbstractMap
An abstract implementation of Map to make it easier to create your own implementations.

Map
An object that maps keys onto values.

Set
A collection that contains no duplicates.

Classes in java.util used by sun.reflect.annotation

Map
An object that maps keys onto values.

Classes in java.util used by sun.reflect.generics.tree

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

Classes in java.util used by sun.util

Enumeration
Interface for lists of objects that can be returned in sequence.

Locale
Locales represent a specific country and culture.

Set
A collection that contains no duplicates.

Classes in java.util used by sun.util.resources

Enumeration
Interface for lists of objects that can be returned in sequence.

Locale
Locales represent a specific country and culture.

Map
An object that maps keys onto values.

ResourceBundle
A resource bundle contains locale-specific data.

Set
A collection that contains no duplicates.