Uses of Package
java.util

• Packages that usejava.util 

  Package	Description
  com.sun.java.accessibility.util	Provides a collection of interfaces and classes that compose the Java Accessibility Utilities.
  com.sun.jdi	This is the core package of the Java Debug Interface (JDI), it defines mirrors for values, types, and the target VirtualMachine itself - as well bootstrapping facilities.
  com.sun.jdi.connect	This package defines connections between the virtual machine using the JDI and the target virtual machine.
  com.sun.jdi.event	This package defines JDI events and event processing.
  com.sun.jdi.request	This package is used to request that a JDI event be sent under specified conditions.
  com.sun.management	This package contains the JDK's extension to the standard implementation of thejava.lang.management API and also defines the management interface for some other components of the platform.
  com.sun.net.httpserver	Provides a simple high-level Http server API, which can be used to build embedded HTTP servers.
  com.sun.nio.sctp	A Java API for Stream Control Transport Protocol.
  com.sun.security.auth.module	Provides implementations ofLoginModule.
  com.sun.source.doctree	Provides interfaces to represent documentation comments as abstract syntax trees (AST).
  com.sun.source.tree	Provides interfaces to represent source code as abstract syntax trees (AST).
  com.sun.source.util	Provides utilities for operations on abstract syntax trees (AST).
  com.sun.tools.attach	Provides the API to attach to a Java™ virtual machine.
  com.sun.tools.attach.spi	Only developers who are defining new attach providers should need to make direct use of this package.
  com.sun.tools.jconsole	This package contains the JConsole API.
  java.applet	Provides the classes necessary to create an applet and the classes an applet uses to communicate with its applet context.
  java.awt	Contains all of the classes for creating user interfaces and for painting graphics and images.
  java.awt.datatransfer	Provides interfaces and classes for transferring data between and within applications.
  java.awt.desktop	Provides interfaces and classes for interaction with various desktop capabilities.
  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.awt.font	Provides classes and interface relating to fonts.
  java.awt.im	Provides classes and interfaces for the input method framework.
  java.awt.im.spi	Provides interfaces that enable the development of input methods that can be used with any Java runtime environment.
  java.awt.image	Provides classes for creating and modifying images.
  java.awt.image.renderable	Provides classes and interfaces for producing rendering-independent images.
  java.beans	Contains classes related to developingbeans -- components based on the JavaBeans™ architecture.
  java.beans.beancontext	Provides classes and interfaces relating to bean context.
  java.io	Provides for system input and output through data streams, serialization and the file system.
  java.lang	Provides classes that are fundamental to the design of the Java programming language.
  java.lang.instrument	Provides services that allow Java programming language agents to instrument programs running on the JVM.
  java.lang.invoke	Thejava.lang.invoke package provides low-level primitives for interacting with the Java Virtual Machine.
  java.lang.management	Provides the management interfaces for monitoring and management of theJava virtual machine and other components in the Java runtime.
  java.lang.module	Classes to support module descriptors and creating configurations of modules by means of resolution and service binding.
  java.math	Provides classes for performing arbitrary-precision integer arithmetic (BigInteger) and arbitrary-precision decimal arithmetic (BigDecimal).
  java.net	Provides the classes for implementing networking applications.
  java.net.http	HTTP Client and WebSocket APIs
  java.nio.channels	Defines channels, which represent connections to entities that are capable of performing I/O operations, such as files and sockets; defines selectors, for multiplexed, non-blocking I/O operations.
  java.nio.channels.spi	Service-provider classes for thejava.nio.channels package.
  java.nio.charset	Defines charsets, decoders, and encoders, for translating between bytes and Unicode characters.
  java.nio.charset.spi	Service-provider classes for thejava.nio.charset package.
  java.nio.file	Defines interfaces and classes for the Java virtual machine to access files, file attributes, and file systems.
  java.nio.file.attribute	Interfaces and classes providing access to file and file system attributes.
  java.nio.file.spi	Service-provider classes for thejava.nio.file package.
  java.rmi.activation	Provides support for RMI Object Activation.
  java.security	Provides the classes and interfaces for the security framework.
  java.security.acl	The classes and interfaces in this package have been deprecated.
  java.security.cert	Provides classes and interfaces for parsing and managing certificates, certificate revocation lists (CRLs), and certification paths.
  java.security.interfaces	Provides interfaces for generating RSA (Rivest, Shamir and Adleman AsymmetricCipher algorithm) keys as defined in the RSA Laboratory Technical Note PKCS#1, and DSA (Digital Signature Algorithm) keys as defined in NIST's FIPS-186.
  java.sql	Provides the API for accessing and processing data stored in adata source (usually a relational database) using theJava™ programming language.
  java.text	Provides classes and interfaces for handling text, dates, numbers, and messages in a manner independent of natural languages.
  java.text.spi	Service provider classes for the classes in the java.text package.
  java.time	The main API for dates, times, instants, and durations.
  java.time.chrono	Generic API for calendar systems other than the default ISO.
  java.time.format	Provides classes to print and parse dates and times.
  java.time.temporal	Access to date and time using fields and units, and date time adjusters.
  java.time.zone	Support for time-zones and their rules.
  java.util	Contains the collections framework, some internationalization support classes, a service loader, properties, random number generation, string parsing and scanning classes, base64 encoding and decoding, a bit array, and several miscellaneous utility classes.
  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.function	Functional interfaces provide target types for lambda expressions and method references.
  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.logging	Provides the classes and interfaces of the Java™ 2 platform's core logging facilities.
  java.util.prefs	This package allows applications to store and retrieve user and systempreference and configuration data.
  java.util.spi	Service provider classes for the classes in the java.util package.
  java.util.stream	Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.
  java.util.zip	Provides classes for reading and writing the standard ZIP and GZIP file formats.
  javax.accessibility	Defines a contract between user-interface components and an assistive technology that provides access to those components.
  javax.annotation.processing	Facilities for declaring annotation processors and for allowing annotation processors to communicate with an annotation processing tool environment.
  javax.imageio	The main package of the Java Image I/O API.
  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.imageio.metadata	A package of the Java Image I/O API dealing with reading and writing metadata.
  javax.imageio.plugins.bmp	Package containing the public classes used by the built-in BMP plug-in.
  javax.imageio.plugins.jpeg	Classes supporting the built-in JPEG plug-in.
  javax.imageio.plugins.tiff	Public classes used by the built-in TIFF plug-ins.
  javax.imageio.spi	A package of the Java Image I/O API containing the plug-in interfaces for readers, writers, transcoders, and streams, and a runtime registry.
  javax.lang.model	Classes and hierarchies of packages used to model the Java programming language.
  javax.lang.model.element	Interfaces used to model elements of the Java programming language.
  javax.lang.model.type	Interfaces used to model Java programming language types.
  javax.lang.model.util	Utilities to assist in the processing ofprogram elements andtypes.
  javax.management	Provides the core classes for the Java Management Extensions.
  javax.management.loading	Provides the classes which implement advanced dynamic loading.
  javax.management.monitor	Provides the definition of the monitor classes.
  javax.management.openmbean	Provides the open data types and Open MBean descriptor classes.
  javax.management.relation	Provides the definition of the Relation Service.
  javax.management.remote	Interfaces for remote access to JMX MBean servers.
  javax.management.remote.rmi	The RMI connector is a connector for the JMX Remote API that uses RMI to transmit client requests to a remote MBean server.
  javax.management.timer	Provides the definition of the Timer MBean.
  javax.naming	Provides the classes and interfaces for accessing naming services.
  javax.naming.directory	Extends thejavax.naming package to provide functionalityfor accessing directory services.
  javax.naming.event	Provides support for event notification when accessing naming anddirectory services.
  javax.naming.ldap	Provides support for LDAPv3 extended operations and controls.
  javax.naming.spi	Provides the means for dynamically plugging in support for accessingnaming and directory services through thejavax.namingand related packages.
  javax.net.ssl	Provides classes for the secure socket package.
  javax.print.attribute	Provides classes and interfaces that describe the types of Java™ Print Service attributes and how they can be collected into attribute sets.
  javax.print.attribute.standard	Packagejavax.print.attribute.standard contains classes for specific printing attributes.
  javax.print.event	Packagejavax.print.event contains event classes and listener interfaces.
  javax.script	The scripting API consists of interfaces and classes that defineJava™ Scripting Engines and providesa framework for their use in Java applications.
  javax.security.auth	This package provides a framework for authentication and authorization.
  javax.security.auth.callback	This package provides the classes necessary for services to interact with applications in order to retrieve information (authentication data including usernames or passwords, for example) or to display information (error and warning messages, for example).
  javax.security.auth.kerberos	This package contains utility classes related to the Kerberos network authentication protocol.
  javax.security.auth.login	This package provides a pluggable authentication framework.
  javax.security.auth.spi	This package provides the interface to be used for implementing pluggable authentication modules.
  javax.security.auth.x500	This package contains the classes that should be used to store X500 Principal and X500 Private Credentials in aSubject.
  javax.security.cert	Provides classes for public key certificates.
  javax.security.sasl	Contains class and interfaces for supporting SASL.
  javax.smartcardio	Java™ Smart Card I/O API
  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 fromthe Java™ programming language.
  javax.sql.rowset	Standard interfaces and base classes for JDBCRowSet implementations.
  javax.sql.rowset.serial	Provides utility classes to allow serializable mappings between SQL typesand data types in the Java programming language.
  javax.sql.rowset.spi	The standard classes and interfaces that a third party vendor has to use in its implementation of a synchronization provider.
  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 codenamedMetal), which is the default look and feel.
  javax.swing.plaf.multi	Provides user interface objects that combine two or more look and feels.
  javax.swing.plaf.synth	Synth is a skinnable look and feel in which all painting is delegated.
  javax.swing.table	Provides classes and interfaces for dealing withjavax.swing.JTable.
  javax.swing.text	Provides classes and interfaces that deal with editable and noneditable text components.
  javax.swing.text.html	Provides the classHTMLEditorKit and supporting classes for creating HTML text editors.
  javax.swing.text.html.parser	Provides the default HTML parser, along with support classes.
  javax.swing.tree	Provides classes and interfaces for dealing withjavax.swing.JTree.
  javax.swing.undo	Allows developers to provide support for undo/redo in applications such as text editors.
  javax.tools	Provides interfaces for tools which can be invoked from a program, for example, compilers.
  javax.xml.crypto	Common classes for XML cryptography.
  javax.xml.crypto.dom	DOM-specific classes for thejavax.xml.crypto package.
  javax.xml.crypto.dsig	Classes for generating and validating XML digitalsignatures.
  javax.xml.crypto.dsig.keyinfo	Classes for parsing and processingKeyInfo elements and structures.
  javax.xml.crypto.dsig.spec	Parameter classes for XML digital signatures.
  javax.xml.datatype	Defines XML/Java Type Mappings.
  javax.xml.namespace	Defines XML Namespace processing.
  javax.xml.stream	Defines interfaces and classes for the Streaming API for XML (StAX).
  javax.xml.stream.events	Defines event interfaces for the Streaming API for XML (StAX).
  javax.xml.stream.util	Provides utility classes for the Streaming API for XML (StAX).
  javax.xml.transform	Defines the generic APIs for processing transformation instructions, and performing a transformation from source to result.
  javax.xml.xpath	Provides anobject-model neutral API for the evaluation of XPath expressions and access to the evaluation environment.
  jdk.dynalink	Contains interfaces and classes that are used to link aninvokedynamic call site.
  jdk.dynalink.beans	Contains the linker for ordinary Java objects.
  jdk.dynalink.linker	Contains interfaces and classes needed by language runtimes to implement their own language-specific object models and type conversions.
  jdk.dynalink.linker.support	Contains classes that make it more convenient for language runtimes to implement their own language-specific object models and type conversions by providing basic implementations of some classes as well as various utilities.
  jdk.javadoc.doclet	The Doclet API provides an environment which, in conjunction with the Language Model API and Compiler Tree API, allows clients to inspect the source-level structures of programs and libraries, including API comments embedded in the source.
  jdk.jfr	This package provides classes to create events and control Flight Recorder.
  jdk.jfr.consumer	This package contains classes for consuming Flight Recorder data.
  jdk.jshell	Provides interfaces for creating tools, such as a Read-Eval-Print Loop (REPL), which interactively evaluate "snippets" of Java programming language code.
  jdk.jshell.execution	Provides implementation support for building JShell execution engines.
  jdk.jshell.spi	Defines the Service Provider Interface for pluggable JShell execution engines.
  jdk.jshell.tool	Provides a mechanism to launch an instance of a Java™ shell tool.
  jdk.management.jfr	This package contains classes to control and monitor Flight Recorder over Java Management Extensions (JMX).
  jdk.nashorn.api.scripting	This package provides thejavax.script integration, which is the preferred way to use Nashorn.
  jdk.nashorn.api.tree	Nashorn parser API provides interfaces to represent ECMAScript source code as abstract syntax trees (AST) and Parser to parse ECMAScript source scripts.
  jdk.net	Platform specific socket options for thejava.net andjava.nio.channels socket classes.
  org.xml.sax	Provides the core SAX APIs.
  org.xml.sax.helpers	Provides helper classes, including support for bootstrapping SAX-based applications.

• Classes injava.util used bycom.sun.java.accessibility.util 

  Class	Description
  EventListener	A tagging interface that all event listener interfaces must extend.
  Locale	ALocale object represents a specific geographical, political, or cultural region.

• Classes injava.util used bycom.sun.jdi 

  Class	Description
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.

• Classes injava.util used bycom.sun.jdi.connect 

  Class	Description
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.

• Classes injava.util used bycom.sun.jdi.event 

  Class	Description
  Collection	The root interface in thecollection hierarchy.
  Iterator	An iterator over a collection.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used bycom.sun.jdi.request 

  Class	Description
  List	An ordered collection (also known as asequence).

• Classes injava.util used bycom.sun.management 

  Class	Description
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.

• Classes injava.util used bycom.sun.net.httpserver 

  Class	Description
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.

• Classes injava.util used bycom.sun.nio.sctp 

  Class	Description
  Set	A collection that contains no duplicate elements.

• Classes injava.util used bycom.sun.security.auth.module 

  Class	Description
  Map	An object that maps keys to values.

• Classes injava.util used bycom.sun.source.doctree 

  Class	Description
  List	An ordered collection (also known as asequence).

• Classes injava.util used bycom.sun.source.tree 

  Class	Description
  List	An ordered collection (also known as asequence).
  Set	A collection that contains no duplicate elements.

• Classes injava.util used bycom.sun.source.util 

  Class	Description
  Iterator	An iterator over a collection.
  List	An ordered collection (also known as asequence).

• Classes injava.util used bycom.sun.tools.attach 

  Class	Description
  List	An ordered collection (also known as asequence).
  Properties	TheProperties class represents a persistent set of properties.

• Classes injava.util used bycom.sun.tools.attach.spi 

  Class	Description
  List	An ordered collection (also known as asequence).

• Classes injava.util used bycom.sun.tools.jconsole 

  Class	Description
  Map	An object that maps keys to values.

• Classes injava.util used byjava.applet 

  Class	Description
  Enumeration	An object that implements the Enumeration interface generates a series of elements, one at a time.
  Iterator	An iterator over a collection.
  Locale	ALocale object represents a specific geographical, political, or cultural region.

• Classes injava.util used byjava.awt 

  Class	Description
  Collection	The root interface in thecollection hierarchy.
  EmptyStackException	Thrown by methods in theStack class to indicate that the stack is empty.
  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.
  EventObject	The root class from which all event state objects shall be derived.
  Hashtable	This class implements a hash table, which maps keys to values.
  List	An ordered collection (also known as asequence).
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Map	An object that maps keys to values.
  Map.Entry	A map entry (key-value pair).
  Properties	TheProperties class represents a persistent set of properties.
  ResourceBundle	Resource bundles contain locale-specific objects.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.awt.datatransfer 

  Class	Description
  EventListener	A tagging interface that all event listener interfaces must extend.
  EventObject	The root class from which all event state objects shall be derived.
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.

• Classes injava.util used byjava.awt.desktop 

  Class	Description
  EventListener	A tagging interface that all event listener interfaces must extend.
  EventObject	The root class from which all event state objects shall be derived.
  List	An ordered collection (also known as asequence).

• Classes injava.util used byjava.awt.dnd 

  Class	Description
  ArrayList	Resizable-array implementation of theList interface.
  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.
  List	An ordered collection (also known as asequence).
  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 injava.util used byjava.awt.event 

  Class	Description
  EventListener	A tagging interface that all event listener interfaces must extend.
  EventListenerProxy	An abstract wrapper class for anEventListener 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 injava.util used byjava.awt.font 

  Class	Description
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.awt.im 

  Class	Description
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Map	An object that maps keys to values.

• Classes injava.util used byjava.awt.im.spi 

  Class	Description
  Locale	ALocale object represents a specific geographical, political, or cultural region.

• Classes injava.util used byjava.awt.image 

  Class	Description
  Hashtable	This class implements a hash table, which maps keys to values.
  List	An ordered collection (also known as asequence).
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjava.awt.image.renderable 

  Class	Description
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjava.beans 

  Class	Description
  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.
  EventListenerProxy	An abstract wrapper class for anEventListener 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 injava.util used byjava.beans.beancontext 

  Class	Description
  ArrayList	Resizable-array implementation of theList interface.
  Collection	The root interface in thecollection 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.
  HashMap	Hash table based implementation of theMap interface.
  Iterator	An iterator over a collection.
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  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 injava.util used byjava.io 

  Class	Description
  Enumeration	An object that implements the Enumeration interface generates a series of elements, one at a time.
  Locale	ALocale object represents a specific geographical, political, or cultural region.

• Classes injava.util used byjava.lang 

  Class	Description
  Comparator	A comparison function, which imposes atotal 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.
  List	An ordered collection (also known as asequence).
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Map	An object that maps keys to values.
  Optional	A container object which may or may not contain a non-null value.
  Properties	TheProperties class represents a persistent set of properties.
  ResourceBundle	Resource bundles contain locale-specific objects.
  Set	A collection that contains no duplicate elements.
  Spliterator	An object for traversing and partitioning elements of a source.

• Classes injava.util used byjava.lang.instrument 

  Class	Description
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.lang.invoke 

  Class	Description
  List	An ordered collection (also known as asequence).

• Classes injava.util used byjava.lang.management 

  Class	Description
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.lang.module 

  Class	Description
  Collection	The root interface in thecollection hierarchy.
  List	An ordered collection (also known as asequence).
  Optional	A container object which may or may not contain a non-null value.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.math 

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

• Classes injava.util used byjava.net 

  Class	Description
  Enumeration	An object that implements the Enumeration interface generates a series of elements, one at a time.
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.net.http 

  Class	Description
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.
  Optional	A container object which may or may not contain a non-null value.
  OptionalLong	A container object which may or may not contain along value.

• Classes injava.util used byjava.nio.channels 

  Class	Description
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.nio.channels.spi 

  Class	Description
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.nio.charset 

  Class	Description
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Set	A collection that contains no duplicate elements.
  SortedMap	AMap that further provides atotal ordering on its keys.

• Classes injava.util used byjava.nio.charset.spi 

  Class	Description
  Iterator	An iterator over a collection.

• Classes injava.util used byjava.nio.file 

  Class	Description
  ConcurrentModificationException	This exception may be thrown by methods that have detected concurrent modification of an object when such modification is not permissible.
  Iterator	An iterator over a collection.
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.nio.file.attribute 

  Class	Description
  List	An ordered collection (also known as asequence).
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.nio.file.spi 

  Class	Description
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.rmi.activation 

  Class	Description
  Properties	TheProperties class represents a persistent set of properties.

• Classes injava.util used byjava.security 

  Class	Description
  Collection	The root interface in thecollection hierarchy.
  Date	The classDate represents a specific instant in time, with millisecond precision.
  Dictionary	TheDictionary class is the abstract parent of any class, such asHashtable, which maps keys to values.
  Enumeration	An object that implements the Enumeration interface generates a series of elements, one at a time.
  Hashtable	This class implements a hash table, which maps keys to values.
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.
  Map.Entry	A map entry (key-value pair).
  Properties	TheProperties class represents a persistent set of properties.
  Random	An instance of this class is used to generate a stream of pseudorandom numbers.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.security.acl 

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

• Classes injava.util used byjava.security.cert 

  Class	Description
  Collection	The root interface in thecollection hierarchy.
  Date	The classDate represents a specific instant in time, with millisecond precision.
  Iterator	An iterator over a collection.
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.security.interfaces 

  Class	Description
  Optional	A container object which may or may not contain a non-null value.

• Classes injava.util used byjava.sql 

  Class	Description
  Calendar	TheCalendar class is an abstract class that provides methods for converting between a specific instant in time and a set ofcalendar fields such asYEAR,MONTH,DAY_OF_MONTH,HOUR, and so on, and for manipulating the calendar fields, such as getting the date of the next week.
  Date	The classDate represents a specific instant in time, with millisecond precision.
  Enumeration	An object that implements the Enumeration interface generates a series of elements, one at a time.
  Iterator	An iterator over a collection.
  Map	An object that maps keys to values.
  Properties	TheProperties class represents a persistent set of properties.

• Classes injava.util used byjava.text 

  Class	Description
  Calendar	TheCalendar class is an abstract class that provides methods for converting between a specific instant in time and a set ofcalendar fields such asYEAR,MONTH,DAY_OF_MONTH,HOUR, and so on, and for manipulating the calendar fields, such as getting the date of the next week.
  Comparator	A comparison function, which imposes atotal ordering on some collection of objects.
  Currency	Represents a currency.
  Date	The classDate represents a specific instant in time, with millisecond precision.
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.
  TimeZone	TimeZone represents a time zone offset, and also figures out daylight savings.

• Classes injava.util used byjava.text.spi 

  Class	Description
  Locale	ALocale object represents a specific geographical, political, or cultural region.

• Classes injava.util used byjava.time 

  Class	Description
  Comparator	A comparison function, which imposes atotal ordering on some collection of objects.
  List	An ordered collection (also known as asequence).
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.time.chrono 

  Class	Description
  Comparator	A comparison function, which imposes atotal ordering on some collection of objects.
  List	An ordered collection (also known as asequence).
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.time.format 

  Class	Description
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.time.temporal 

  Class	Description
  List	An ordered collection (also known as asequence).
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Map	An object that maps keys to values.

• Classes injava.util used byjava.time.zone 

  Class	Description
  List	An ordered collection (also known as asequence).
  NavigableMap	ASortedMap extended with navigation methods returning the closest matches for given search targets.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjava.util 

  Class	Description
  AbstractCollection	This class provides a skeletal implementation of theCollection interface, to minimize the effort required to implement this interface.
  AbstractList	This class provides a skeletal implementation of theList 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 theMap interface, to minimize the effort required to implement this interface.
  AbstractQueue	This class provides skeletal implementations of someQueue operations.
  AbstractSequentialList	This class provides a skeletal implementation of theList 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 theSet interface to minimize the effort required to implement this interface.
  ArrayDeque	Resizable-array implementation of theDeque interface.
  ArrayList	Resizable-array implementation of theList interface.
  Base64.Decoder	This class implements a decoder for decoding byte data using the Base64 encoding scheme as specified in RFC 4648 and RFC 2045.
  Base64.Encoder	This class implements an encoder for encoding byte data using the Base64 encoding scheme as specified in RFC 4648 and RFC 2045.
  BitSet	This class implements a vector of bits that grows as needed.
  Calendar	TheCalendar class is an abstract class that provides methods for converting between a specific instant in time and a set ofcalendar fields such asYEAR,MONTH,DAY_OF_MONTH,HOUR, and so on, and for manipulating the calendar fields, such as getting the date of the next week.
  Calendar.Builder	Calendar.Builder is used for creating aCalendar from various date-time parameters.
  Collection	The root interface in thecollection hierarchy.
  Comparator	A comparison function, which imposes atotal ordering on some collection of objects.
  Currency	Represents a currency.
  Date	The classDate represents a specific instant in time, with millisecond precision.
  Deque	A linear collection that supports element insertion and removal at both ends.
  Dictionary	TheDictionary class is the abstract parent of any class, such asHashtable, which maps keys to values.
  DoubleSummaryStatistics	A state object for collecting statistics such as count, min, max, sum, and average.
  Enumeration	An object that implements the Enumeration interface generates a series of elements, one at a time.
  EnumMap	A specializedMap implementation for use with enum type keys.
  EnumSet	A specializedSet implementation for use with enum types.
  EventListener	A tagging interface that all event listener interfaces must extend.
  Formatter	An interpreter for printf-style format strings.
  Formatter.BigDecimalLayoutForm	Enum forBigDecimal formatting.
  GregorianCalendar	GregorianCalendar is a concrete subclass ofCalendar and provides the standard calendar system used by most of the world.
  HashMap	Hash table based implementation of theMap interface.
  HashSet	This class implements theSet interface, backed by a hash table (actually aHashMap instance).
  Hashtable	This class implements a hash table, which maps keys to values.
  IllegalFormatException	Unchecked exception thrown when a format string contains an illegal syntax or a format specifier that is incompatible with the given arguments.
  IntSummaryStatistics	A state object for collecting statistics such as count, min, max, sum, and average.
  InvalidPropertiesFormatException	Thrown to indicate that an operation could not complete because the input did not conform to the appropriate XML document type for a collection of properties, as per theProperties specification.
  Iterator	An iterator over a collection.
  List	An ordered collection (also known as asequence).
  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.
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Locale.Builder	Builder is used to build instances ofLocale from values configured by the setters.
  Locale.Category	Enum for locale categories.
  Locale.FilteringMode	This enum provides constants to select a filtering mode for locale matching.
  Locale.IsoCountryCode	Enum for specifying the type defined in ISO 3166.
  Locale.LanguageRange	This class expresses aLanguage Range defined inRFC 4647 Matching of Language Tags.
  LongSummaryStatistics	A state object for collecting statistics such as count, min, max, sum, and average.
  Map	An object that maps keys to values.
  Map.Entry	A map entry (key-value pair).
  MissingResourceException	Signals that a resource is missing.
  NavigableMap	ASortedMap extended with navigation methods returning the closest matches for given search targets.
  NavigableSet	ASortedSet extended with navigation methods reporting closest matches for given search targets.
  NoSuchElementException	Thrown by various accessor methods to indicate that the element being requested does not exist.
  Observable	Deprecated. This class and theObserver interface have been deprecated.
  Observer	Deprecated. This interface has been deprecated.
  Optional	A container object which may or may not contain a non-null value.
  OptionalDouble	A container object which may or may not contain adouble value.
  OptionalInt	A container object which may or may not contain anint value.
  OptionalLong	A container object which may or may not contain along value.
  PrimitiveIterator	A base type for primitive specializations ofIterator.
  PrimitiveIterator.OfDouble	An Iterator specialized fordouble values.
  PrimitiveIterator.OfInt	An Iterator specialized forint values.
  PrimitiveIterator.OfLong	An Iterator specialized forlong values.
  PriorityQueue	An unbounded priorityqueue based on a priority heap.
  Properties	TheProperties class represents a persistent set of properties.
  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 byList implementations to indicate that they support fast (generally constant time) random access.
  ResourceBundle	Resource bundles contain locale-specific objects.
  ResourceBundle.Control	ResourceBundle.Control defines a set of callback methods that are invoked by theResourceBundle.getBundle factory methods during the bundle loading process.
  Scanner	A simple text scanner which can parse primitive types and strings using regular expressions.
  ServiceLoader	A facility to load implementations of a service.
  ServiceLoader.Provider	Represents a service provider located byServiceLoader.
  Set	A collection that contains no duplicate elements.
  SortedMap	AMap that further provides atotal ordering on its keys.
  SortedSet	ASet that further provides atotal ordering on its elements.
  Spliterator	An object for traversing and partitioning elements of a source.
  Spliterator.OfDouble	A Spliterator specialized fordouble values.
  Spliterator.OfInt	A Spliterator specialized forint values.
  Spliterator.OfLong	A Spliterator specialized forlong values.
  Spliterator.OfPrimitive	A Spliterator specialized for primitive values.
  SplittableRandom	A generator of uniform pseudorandom values applicable for use in (among other contexts) isolated parallel computations that may generate subtasks.
  StringJoiner	StringJoiner is used to construct a sequence of characters separated by a delimiter and optionally starting with a supplied prefix and ending with a supplied suffix.
  TimerTask	A task that can be scheduled for one-time or repeated execution by aTimer.
  TimeZone	TimeZone represents a time zone offset, and also figures out daylight savings.
  UUID	A class that represents an immutable universally unique identifier (UUID).
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjava.util.concurrent 

  Class	Description
  AbstractCollection	This class provides a skeletal implementation of theCollection interface, to minimize the effort required to implement this interface.
  AbstractMap	This class provides a skeletal implementation of theMap interface, to minimize the effort required to implement this interface.
  AbstractQueue	This class provides skeletal implementations of someQueue operations.
  AbstractSet	This class provides a skeletal implementation of theSet interface to minimize the effort required to implement this interface.
  Collection	The root interface in thecollection hierarchy.
  Comparator	A comparison function, which imposes atotal ordering on some collection of objects.
  Deque	A linear collection that supports element insertion and removal at both ends.
  Enumeration	An object that implements the Enumeration interface generates a series of elements, one at a time.
  Iterator	An iterator over a collection.
  List	An ordered collection (also known as asequence).
  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).
  NavigableMap	ASortedMap extended with navigation methods returning the closest matches for given search targets.
  NavigableSet	ASortedSet extended with navigation methods reporting closest matches for given search targets.
  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 byList implementations to indicate that they support fast (generally constant time) random access.
  Set	A collection that contains no duplicate elements.
  SortedMap	AMap that further provides atotal ordering on its keys.
  SortedSet	ASet that further provides atotal ordering on its elements.
  Spliterator	An object for traversing and partitioning elements of a source.

• Classes injava.util used byjava.util.concurrent.locks 

  Class	Description
  Collection	The root interface in thecollection hierarchy.
  Date	The classDate represents a specific instant in time, with millisecond precision.

• Classes injava.util used byjava.util.function 

  Class	Description
  Comparator	A comparison function, which imposes atotal ordering on some collection of objects.

• Classes injava.util used byjava.util.jar 

  Class	Description
  Collection	The root interface in thecollection hierarchy.
  Enumeration	An object that implements the Enumeration interface generates a series of elements, one at a time.
  Map	An object that maps keys to values.
  Map.Entry	A map entry (key-value pair).
  Set	A collection that contains no duplicate elements.
  SortedMap	AMap that further provides atotal ordering on its keys.

• Classes injava.util used byjava.util.logging 

  Class	Description
  Enumeration	An object that implements the Enumeration interface generates a series of elements, one at a time.
  List	An ordered collection (also known as asequence).
  ResourceBundle	Resource bundles contain locale-specific objects.

• Classes injava.util used byjava.util.prefs 

  Class	Description
  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 injava.util used byjava.util.spi 

  Class	Description
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Map	An object that maps keys to values.
  Optional	A container object which may or may not contain a non-null value.
  ResourceBundle	Resource bundles contain locale-specific objects.
  ResourceBundle.Control	ResourceBundle.Control defines a set of callback methods that are invoked by theResourceBundle.getBundle factory methods during the bundle loading process.

• Classes injava.util used byjava.util.stream 

  Class	Description
  Collection	The root interface in thecollection hierarchy.
  Comparator	A comparison function, which imposes atotal ordering on some collection of objects.
  DoubleSummaryStatistics	A state object for collecting statistics such as count, min, max, sum, and average.
  IntSummaryStatistics	A state object for collecting statistics such as count, min, max, sum, and average.
  Iterator	An iterator over a collection.
  List	An ordered collection (also known as asequence).
  LongSummaryStatistics	A state object for collecting statistics such as count, min, max, sum, and average.
  Map	An object that maps keys to values.
  Optional	A container object which may or may not contain a non-null value.
  OptionalDouble	A container object which may or may not contain adouble value.
  OptionalInt	A container object which may or may not contain anint value.
  OptionalLong	A container object which may or may not contain along value.
  Set	A collection that contains no duplicate elements.
  Spliterator	An object for traversing and partitioning elements of a source.
  Spliterator.OfDouble	A Spliterator specialized fordouble values.
  Spliterator.OfInt	A Spliterator specialized forint values.
  Spliterator.OfLong	A Spliterator specialized forlong values.

• Classes injava.util used byjava.util.zip 

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

• Classes injava.util used byjavax.accessibility 

  Class	Description
  ListResourceBundle	ListResourceBundle is an abstract subclass ofResourceBundle that manages resources for a locale in a convenient and easy to use list.
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  ResourceBundle	Resource bundles contain locale-specific objects.
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.annotation.processing 

  Class	Description
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjavax.imageio 

  Class	Description
  Iterator	An iterator over a collection.
  List	An ordered collection (also known as asequence).
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjavax.imageio.event 

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

• Classes injava.util used byjavax.imageio.metadata 

  Class	Description
  List	An ordered collection (also known as asequence).
  Locale	ALocale object represents a specific geographical, political, or cultural region.

• Classes injava.util used byjavax.imageio.plugins.bmp 

  Class	Description
  Locale	ALocale object represents a specific geographical, political, or cultural region.

• Classes injava.util used byjavax.imageio.plugins.jpeg 

  Class	Description
  Locale	ALocale object represents a specific geographical, political, or cultural region.

• Classes injava.util used byjavax.imageio.plugins.tiff 

  Class	Description
  List	An ordered collection (also known as asequence).
  SortedSet	ASet that further provides atotal ordering on its elements.

• Classes injava.util used byjavax.imageio.spi 

  Class	Description
  Iterator	An iterator over a collection.
  Locale	ALocale object represents a specific geographical, political, or cultural region.

• Classes injava.util used byjavax.lang.model 

  Class	Description
  List	An ordered collection (also known as asequence).

• Classes injava.util used byjavax.lang.model.element 

  Class	Description
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjavax.lang.model.type 

  Class	Description
  List	An ordered collection (also known as asequence).

• Classes injava.util used byjavax.lang.model.util 

  Class	Description
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjavax.management 

  Class	Description
  AbstractCollection	This class provides a skeletal implementation of theCollection interface, to minimize the effort required to implement this interface.
  AbstractList	This class provides a skeletal implementation of theList interface to minimize the effort required to implement this interface backed by a "random access" data store (such as an array).
  ArrayList	Resizable-array implementation of theList interface.
  Collection	The root interface in thecollection 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.
  Hashtable	This class implements a hash table, which maps keys to values.
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.
  RandomAccess	Marker interface used byList implementations to indicate that they support fast (generally constant time) random access.
  Set	A collection that contains no duplicate elements.
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.management.loading 

  Class	Description
  Enumeration	An object that implements the Enumeration interface generates a series of elements, one at a time.
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjavax.management.monitor 

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

• Classes injava.util used byjavax.management.openmbean 

  Class	Description
  Collection	The root interface in thecollection hierarchy.
  Date	The classDate represents a specific instant in time, with millisecond precision.
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.
  Map.Entry	A map entry (key-value pair).
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjavax.management.relation 

  Class	Description
  AbstractCollection	This class provides a skeletal implementation of theCollection interface, to minimize the effort required to implement this interface.
  AbstractList	This class provides a skeletal implementation of theList interface to minimize the effort required to implement this interface backed by a "random access" data store (such as an array).
  ArrayList	Resizable-array implementation of theList interface.
  Collection	The root interface in thecollection 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.
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.
  RandomAccess	Marker interface used byList implementations to indicate that they support fast (generally constant time) random access.
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.management.remote 

  Class	Description
  EventObject	The root class from which all event state objects shall be derived.
  Map	An object that maps keys to values.

• Classes injava.util used byjavax.management.remote.rmi 

  Class	Description
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjavax.management.timer 

  Class	Description
  Date	The classDate represents a specific instant in time, with millisecond precision.
  EventObject	The root class from which all event state objects shall be derived.
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.naming 

  Class	Description
  Enumeration	An object that implements the Enumeration interface generates a series of elements, one at a time.
  Hashtable	This class implements a hash table, which maps keys to values.
  Properties	TheProperties class represents a persistent set of properties.
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.naming.directory 

  Class	Description
  Hashtable	This class implements a hash table, which maps keys to values.
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.naming.event 

  Class	Description
  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 injava.util used byjavax.naming.ldap 

  Class	Description
  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.
  EventObject	The root class from which all event state objects shall be derived.
  Hashtable	This class implements a hash table, which maps keys to values.
  List	An ordered collection (also known as asequence).

• Classes injava.util used byjavax.naming.spi 

  Class	Description
  Hashtable	This class implements a hash table, which maps keys to values.

• Classes injava.util used byjavax.net.ssl 

  Class	Description
  Collection	The root interface in thecollection hierarchy.
  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.
  EventObject	The root class from which all event state objects shall be derived.
  List	An ordered collection (also known as asequence).

• Classes injava.util used byjavax.print.attribute 

  Class	Description
  Date	The classDate represents a specific instant in time, with millisecond precision.
  Locale	ALocale object represents a specific geographical, political, or cultural region.

• Classes injava.util used byjavax.print.attribute.standard 

  Class	Description
  AbstractCollection	This class provides a skeletal implementation of theCollection interface, to minimize the effort required to implement this interface.
  AbstractMap	This class provides a skeletal implementation of theMap interface, to minimize the effort required to implement this interface.
  AbstractSet	This class provides a skeletal implementation of theSet interface to minimize the effort required to implement this interface.
  Collection	The root interface in thecollection hierarchy.
  Date	The classDate represents a specific instant in time, with millisecond precision.
  HashMap	Hash table based implementation of theMap interface.
  HashSet	This class implements theSet interface, backed by a hash table (actually aHashMap instance).
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjavax.print.event 

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

• Classes injava.util used byjavax.script 

  Class	Description
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.

• Classes injava.util used byjavax.security.auth 

  Class	Description
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjavax.security.auth.callback 

  Class	Description
  Locale	ALocale object represents a specific geographical, political, or cultural region.

• Classes injava.util used byjavax.security.auth.kerberos 

  Class	Description
  Date	The classDate represents a specific instant in time, with millisecond precision.

• Classes injava.util used byjavax.security.auth.login 

  Class	Description
  Map	An object that maps keys to values.

• Classes injava.util used byjavax.security.auth.spi 

  Class	Description
  Map	An object that maps keys to values.

• Classes injava.util used byjavax.security.auth.x500 

  Class	Description
  Map	An object that maps keys to values.

• Classes injava.util used byjavax.security.cert 

  Class	Description
  Date	The classDate represents a specific instant in time, with millisecond precision.

• Classes injava.util used byjavax.security.sasl 

  Class	Description
  Enumeration	An object that implements the Enumeration interface generates a series of elements, one at a time.
  Map	An object that maps keys to values.

• Classes injava.util used byjavax.smartcardio 

  Class	Description
  List	An ordered collection (also known as asequence).

• Classes injava.util used byjavax.sound.midi 

  Class	Description
  EventListener	A tagging interface that all event listener interfaces must extend.
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.sound.sampled 

  Class	Description
  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 injava.util used byjavax.sql 

  Class	Description
  Calendar	TheCalendar class is an abstract class that provides methods for converting between a specific instant in time and a set ofcalendar fields such asYEAR,MONTH,DAY_OF_MONTH,HOUR, and so on, and for manipulating the calendar fields, such as getting the date of the next week.
  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 injava.util used byjavax.sql.rowset 

  Class	Description
  Calendar	TheCalendar class is an abstract class that provides methods for converting between a specific instant in time and a set ofcalendar fields such asYEAR,MONTH,DAY_OF_MONTH,HOUR, and so on, and for manipulating the calendar fields, such as getting the date of the next week.
  Collection	The root interface in thecollection hierarchy.
  Map	An object that maps keys to values.

• Classes injava.util used byjavax.sql.rowset.serial 

  Class	Description
  Map	An object that maps keys to values.
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.sql.rowset.spi 

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

• Classes injava.util used byjavax.swing 

  Class	Description
  Collection	The root interface in thecollection hierarchy.
  Comparator	A comparison function, which imposes atotal ordering on some collection of objects.
  Date	The classDate represents a specific instant in time, with millisecond precision.
  Dictionary	TheDictionary class is the abstract parent of any class, such asHashtable, 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.
  EventObject	The root class from which all event state objects shall be derived.
  Hashtable	This class implements a hash table, which maps keys to values.
  List	An ordered collection (also known as asequence).
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.swing.event 

  Class	Description
  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 injava.util used byjavax.swing.plaf.basic 

  Class	Description
  EventListener	A tagging interface that all event listener interfaces must extend.
  Hashtable	This class implements a hash table, which maps keys to values.
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.swing.plaf.metal 

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

• Classes injava.util used byjavax.swing.plaf.multi 

  Class	Description
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.swing.plaf.synth 

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

• Classes injava.util used byjavax.swing.table 

  Class	Description
  Comparator	A comparison function, which imposes atotal ordering on some collection of objects.
  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.
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.swing.text 

  Class	Description
  Dictionary	TheDictionary class is the abstract parent of any class, such asHashtable, 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.
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.swing.text.html 

  Class	Description
  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.
  EventObject	The root class from which all event state objects shall be derived.
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.swing.text.html.parser 

  Class	Description
  BitSet	This class implements a vector of bits that grows as needed.
  Enumeration	An object that implements the Enumeration interface generates a series of elements, one at a time.
  Hashtable	This class implements a hash table, which maps keys to values.
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.swing.tree 

  Class	Description
  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.
  EventObject	The root class from which all event state objects shall be derived.
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.swing.undo 

  Class	Description
  EventListener	A tagging interface that all event listener interfaces must extend.
  Hashtable	This class implements a hash table, which maps keys to values.
  Vector	TheVector class implements a growable array of objects.

• Classes injava.util used byjavax.tools 

  Class	Description
  Collection	The root interface in thecollection hierarchy.
  Iterator	An iterator over a collection.
  List	An ordered collection (also known as asequence).
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  ServiceLoader	A facility to load implementations of a service.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjavax.xml.crypto 

  Class	Description
  Iterator	An iterator over a collection.

• Classes injava.util used byjavax.xml.crypto.dom 

  Class	Description
  Iterator	An iterator over a collection.
  Map.Entry	A map entry (key-value pair).

• Classes injava.util used byjavax.xml.crypto.dsig 

  Class	Description
  List	An ordered collection (also known as asequence).

• Classes injava.util used byjavax.xml.crypto.dsig.keyinfo 

  Class	Description
  List	An ordered collection (also known as asequence).

• Classes injava.util used byjavax.xml.crypto.dsig.spec 

  Class	Description
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.

• Classes injava.util used byjavax.xml.datatype 

  Class	Description
  Calendar	TheCalendar class is an abstract class that provides methods for converting between a specific instant in time and a set ofcalendar fields such asYEAR,MONTH,DAY_OF_MONTH,HOUR, and so on, and for manipulating the calendar fields, such as getting the date of the next week.
  Date	The classDate represents a specific instant in time, with millisecond precision.
  GregorianCalendar	GregorianCalendar is a concrete subclass ofCalendar and provides the standard calendar system used by most of the world.
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  TimeZone	TimeZone represents a time zone offset, and also figures out daylight savings.

• Classes injava.util used byjavax.xml.namespace 

  Class	Description
  Iterator	An iterator over a collection.

• Classes injava.util used byjavax.xml.stream 

  Class	Description
  Iterator	An iterator over a collection.

• Classes injava.util used byjavax.xml.stream.events 

  Class	Description
  Iterator	An iterator over a collection.
  List	An ordered collection (also known as asequence).

• Classes injava.util used byjavax.xml.stream.util 

  Class	Description
  Iterator	An iterator over a collection.

• Classes injava.util used byjavax.xml.transform 

  Class	Description
  Properties	TheProperties class represents a persistent set of properties.

• Classes injava.util used byjavax.xml.xpath 

  Class	Description
  Iterator	An iterator over a collection.
  List	An ordered collection (also known as asequence).

• Classes injava.util used byjdk.dynalink 

  Class	Description
  List	An ordered collection (also known as asequence).
  ServiceConfigurationError	Error thrown when something goes wrong while locating, loading, or instantiating a service provider.

• Classes injava.util used byjdk.dynalink.beans 

  Class	Description
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjdk.dynalink.linker 

  Class	Description
  List	An ordered collection (also known as asequence).

• Classes injava.util used byjdk.dynalink.linker.support 

  Class	Description
  List	An ordered collection (also known as asequence).

• Classes injava.util used byjdk.javadoc.doclet 

  Class	Description
  List	An ordered collection (also known as asequence).
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjdk.jfr 

  Class	Description
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjdk.jfr.consumer 

  Class	Description
  List	An ordered collection (also known as asequence).

• Classes injava.util used byjdk.jshell 

  Class	Description
  Collection	The root interface in thecollection hierarchy.
  List	An ordered collection (also known as asequence).
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Map	An object that maps keys to values.

• Classes injava.util used byjdk.jshell.execution 

  Class	Description
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.

• Classes injava.util used byjdk.jshell.spi 

  Class	Description
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.

• Classes injava.util used byjdk.jshell.tool 

  Class	Description
  Locale	ALocale object represents a specific geographical, political, or cultural region.
  Map	An object that maps keys to values.

• Classes injava.util used byjdk.management.jfr 

  Class	Description
  List	An ordered collection (also known as asequence).
  Map	An object that maps keys to values.

• Classes injava.util used byjdk.nashorn.api.scripting 

  Class	Description
  Collection	The root interface in thecollection hierarchy.
  Map	An object that maps keys to values.
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byjdk.nashorn.api.tree 

  Class	Description
  List	An ordered collection (also known as asequence).

• Classes injava.util used byjdk.net 

  Class	Description
  Set	A collection that contains no duplicate elements.

• Classes injava.util used byorg.xml.sax 

  Class	Description
  Locale	ALocale object represents a specific geographical, political, or cultural region.

• Classes injava.util used byorg.xml.sax.helpers 

  Class	Description
  Enumeration	An object that implements the Enumeration interface generates a series of elements, one at a time.
  Locale	ALocale object represents a specific geographical, political, or cultural region.