Uses of Package
java.util
Packages that use java.util
Package
Description
Provides a collection of interfaces and classes that compose the Java Accessibility
Utilities.
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.
This package defines connections between the virtual machine
using the JDI and the target virtual machine.
This package defines JDI events and event processing.
This package is used to request that a JDI
event be sent under specified conditions.
This package contains the JDK's extension to
the standard implementation of the
java.lang.management API and also defines the management
interface for some other components of the platform.Provides a simple high-level Http server API, which can be used to build
embedded HTTP servers.
A Java API for Stream Control Transport Protocol.
Provides implementations of
LoginModule.Provides interfaces to represent documentation comments as abstract syntax
trees (AST).
Provides interfaces to represent source code as abstract syntax
trees (AST).
Provides utilities for operations on abstract syntax trees (AST).
Provides the API to attach to a Java virtual machine.
Only developers who are defining new attach providers should need to make
direct use of this package.
This package contains the JConsole API.
Provides the classes necessary to create an applet and the classes an applet
uses to communicate with its applet context.
Contains all of the classes for creating user interfaces and for painting
graphics and images.
Provides interfaces and classes for transferring data between and within
applications.
Provides interfaces and classes for interaction with various desktop
capabilities.
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.
Provides interfaces and classes for dealing with different types of events
fired by AWT components.
Provides classes and interface relating to fonts.
Provides classes and interfaces for the input method framework.
Provides interfaces that enable the development of input methods that can be
used with any Java runtime environment.
Provides classes for creating and modifying images.
Provides classes and interfaces for producing rendering-independent images.
Contains classes related to developing beans -- components based on
the JavaBeans architecture.
Provides classes and interfaces relating to bean context.
Provides for system input and output through data streams,
serialization and the file system.
Provides classes that are fundamental to the design of the Java
programming language.
Classes and interfaces to represent nominal descriptors for run-time
entities such as classes or method handles, and classfile entities such as
constant pool entries or
invokedynamic call sites.Provides low-level access to memory and functions outside the Java runtime.
Provides services that allow Java programming language agents to instrument
programs running on the Java Virtual Machine (JVM).
The
java.lang.invoke package provides low-level primitives for interacting
with the Java Virtual Machine.Provides the management interfaces for monitoring and management of the
Java virtual machine and other components in the Java runtime.
Classes to support module descriptors and creating configurations of modules
by means of resolution and service binding.
Provides classes and interfaces for obtaining reflective information about
classes and objects.
Provides classes for performing arbitrary-precision integer
arithmetic (
BigInteger) and arbitrary-precision decimal
arithmetic (BigDecimal).Provides the classes for implementing networking applications.
HTTP Client and WebSocket APIs
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.
Service-provider classes for the
java.nio.channels
package.Defines charsets, decoders, and encoders, for translating between
bytes and Unicode characters.
Service-provider classes for the
java.nio.charset package.Defines interfaces and classes for the Java virtual machine to access files,
file attributes, and file systems.
Interfaces and classes providing access to file and file system attributes.
Service-provider classes for the
java.nio.file package.Provides the classes and interfaces for the security framework.
Provides classes and interfaces for parsing and managing
certificates, certificate revocation lists (CRLs), and
certification paths.
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.
Provides classes and interfaces for key specifications and algorithm
parameter specifications.
Provides the API for accessing and processing data stored in a
data source (usually a relational database) using the
Java programming language.
Provides classes and interfaces for handling text, dates, numbers,
and messages in a manner independent of natural languages.
Service provider classes for the classes in the java.text package.
The main API for dates, times, instants, and durations.
Generic API for calendar systems other than the default ISO.
Provides classes to print and parse dates and times.
Access to date and time using fields and units, and date time adjusters.
Support for time-zones and their rules.
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.
Utility classes commonly useful in concurrent programming.
Interfaces and classes providing a framework for locking and waiting
for conditions that is distinct from built-in synchronization and
monitors.
Functional interfaces provide target types for lambda expressions
and method references.
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.
Provides the classes and interfaces of
the Java 2 platform's core logging facilities.
This package allows applications to store and retrieve user and system
preference and configuration data.
Classes for matching character sequences against patterns specified
by regular expressions.
Service provider classes for the classes in the java.util package.
Classes to support functional-style operations on streams of elements, such
as map-reduce transformations on collections.
Provides classes for reading and writing the standard ZIP and GZIP file
formats.
Defines a contract between user-interface components and an assistive
technology that provides access to those components.
Facilities for declaring annotation processors and for
allowing annotation processors to communicate with an annotation processing
tool environment.
The main package of the Java Image I/O API.
A package of the Java Image I/O API dealing with synchronous notification of
events during the reading and writing of images.
A package of the Java Image I/O API dealing with reading and writing
metadata.
Package containing the public classes used by the built-in BMP plug-in.
Classes supporting the built-in JPEG plug-in.
Public classes used by the built-in TIFF plug-ins.
A package of the Java Image I/O API containing the plug-in interfaces for
readers, writers, transcoders, and streams, and a runtime registry.
Types and hierarchies of packages comprising a Java language model, a model of the declarations and types of the Java
programming language.
Interfaces used to model elements of the Java programming language.
Interfaces used to model Java programming language types.
Utilities to assist in the processing of
program elements and
types.
Provides the core classes for the Java Management Extensions.
Provides the classes which implement advanced dynamic
loading.
Provides the definition of the monitor classes.
Provides the open data types and Open MBean descriptor classes.
Provides the definition of the Relation Service.
Interfaces for remote access to
JMX MBean servers.
The RMI connector is a connector for the JMX Remote API that
uses RMI to transmit client requests to a remote MBean server.
Provides the definition of the Timer MBean.
Provides the classes and interfaces for accessing naming services.
Extends the
javax.naming package to provide functionality
for accessing directory services.Provides support for event notification when accessing naming and
directory services.
Provides support for LDAPv3 extended operations and controls.
Provides the means for dynamically plugging in support for accessing
naming and directory services through the
javax.naming
and related packages.Provides classes for the secure socket package.
Provides classes and interfaces that describe the types of Java Print
Service attributes and how they can be collected into attribute sets.
Package
javax.print.attribute.standard contains classes for specific
printing attributes.Package
javax.print.event contains event classes and listener
interfaces.The scripting API consists of interfaces and classes that define
Java Scripting Engines and provides
a framework for their use in Java applications.
This package provides a framework for authentication and
authorization.
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).
This package contains utility classes related to the Kerberos network
authentication protocol.
This package provides a pluggable authentication framework.
This package provides the interface to be used for
implementing pluggable authentication modules.
This package contains the classes that should be used to store
X500 Principal and X500 Private Credentials in a
Subject.
Provides classes for public key certificates.
Contains class and interfaces for supporting SASL.
Java™ Smart Card I/O API.
Provides interfaces and classes for I/O, sequencing, and synthesis of MIDI
(Musical Instrument Digital Interface) data.
Provides interfaces and classes for capture, processing, and playback of
sampled audio data.
Provides the API for server side data source access and processing from
the Java programming language.
Standard interfaces and base classes for JDBC
RowSet
implementations.Provides utility classes to allow serializable mappings between SQL types
and data types in the Java programming language.
The standard classes and interfaces that a third party vendor has to
use in its implementation of a synchronization provider.
Provides a set of "lightweight" (all-Java language) components
that, to the maximum degree possible, work the same on all platforms.
Provides for events fired by Swing components.
Provides user interface objects built according to the Basic look and feel.
Provides user interface objects built according to the Java look and feel
(once codenamed Metal), which is the default look and feel.
Provides user interface objects that combine two or more look and feels.
Synth is a skinnable look and feel in which all painting is delegated.
Provides classes and interfaces for dealing with
javax.swing.JTable.Provides classes and interfaces that deal with editable and noneditable text
components.
Provides the class
HTMLEditorKit and supporting classes for creating
HTML text editors.Provides the default HTML parser, along with support classes.
Provides classes and interfaces for dealing with
javax.swing.JTree.Allows developers to provide support for undo/redo in applications such as
text editors.
Provides interfaces for tools which can be invoked from a program,
for example, compilers.
Common classes for XML cryptography.
DOM-specific classes for the
javax.xml.crypto package.Classes for generating and validating XML digital
signatures.
Classes for parsing and processing
KeyInfo elements and structures.Parameter classes for XML digital signatures.
Defines XML/Java Type Mappings.
Defines XML Namespace processing.
Defines interfaces and classes for the Streaming API for XML (StAX).
Defines event interfaces for the Streaming API for XML (StAX).
Provides utility classes for the Streaming API for XML (StAX).
Defines the generic APIs for processing transformation instructions,
and performing a transformation from source to result.
Provides an object-model neutral API for the
evaluation of XPath expressions and access to the evaluation
environment.
Contains interfaces and classes that are used to link an
invokedynamic call site.Contains the linker for ordinary Java objects.
Contains interfaces and classes needed by language runtimes to implement
their own language-specific object models and type conversions.
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.
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.
This package provides classes to create events and control Flight Recorder.
This package contains classes for consuming Flight Recorder data.
Provides interfaces for creating tools, such as a Read-Eval-Print Loop (REPL),
which interactively evaluate "snippets" of Java programming language code.
Provides implementation support for building JShell execution engines.
Defines the Service Provider Interface for pluggable JShell execution engines.
Provides a mechanism to launch an instance of a Java shell tool.
This package contains classes to control and monitor Flight Recorder over Java Management Extensions (JMX).
Platform specific socket options for the
java.net and java.nio.channels
socket classes.Provides the interfaces for the Simple API for XML (SAX).
Provides helper classes, including
support for bootstrapping SAX-based applications.
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Classes in java.util used by com.sun.java.accessibility.utilClassDescriptionA tagging interface that all event listener interfaces must extend.A
Localeobject represents a specific geographical, political, or cultural region. -
Classes in java.util used by com.sun.jdi
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Classes in java.util used by com.sun.jdi.connect
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Classes in java.util used by com.sun.jdi.eventClassDescriptionThe root interface in the collection hierarchy.An iterator over a collection.A collection that contains no duplicate elements.
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Classes in java.util used by com.sun.jdi.requestClassDescriptionAn ordered collection, where the user has precise control over where in the list each element is inserted.
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Classes in java.util used by com.sun.managementClassDescriptionThe root interface in the collection hierarchy.An ordered collection, where the user has precise control over where in the list each element is inserted.An object that maps keys to values.
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Classes in java.util used by com.sun.net.httpserverClassDescriptionThe root interface in the collection hierarchy.An ordered collection, where the user has precise control over where in the list each element is inserted.An object that maps keys to values.A map entry (key-value pair).A collection that contains no duplicate elements.
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Classes in java.util used by com.sun.nio.sctp
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Classes in java.util used by com.sun.security.auth.module
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Classes in java.util used by com.sun.source.doctreeClassDescriptionAn ordered collection, where the user has precise control over where in the list each element is inserted.
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Classes in java.util used by com.sun.source.tree
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Classes in java.util used by com.sun.source.util
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Classes in java.util used by com.sun.tools.attachClassDescriptionAn ordered collection, where the user has precise control over where in the list each element is inserted.The
Propertiesclass represents a persistent set of properties. -
Classes in java.util used by com.sun.tools.attach.spiClassDescriptionAn ordered collection, where the user has precise control over where in the list each element is inserted.
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Classes in java.util used by com.sun.tools.jconsole
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Classes in java.util used by java.appletClassDescriptionAn object that implements the Enumeration interface generates a series of elements, one at a time.An iterator over a collection.A
Localeobject represents a specific geographical, political, or cultural region. -
ClassDescriptionThe root interface in the collection hierarchy.Thrown by methods in the
Stackclass to indicate that the stack is empty.An object that implements the Enumeration interface generates a series of elements, one at a time.A tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.This class implements a hash table, which maps keys to values.An ordered collection, where the user has precise control over where in the list each element is inserted.ALocaleobject represents a specific geographical, political, or cultural region.An object that maps keys to values.A map entry (key-value pair).ThePropertiesclass represents a persistent set of properties.Resource bundles contain locale-specific objects.A collection that contains no duplicate elements. -
Classes in java.util used by java.awt.datatransferClassDescriptionA tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.An ordered collection, where the user has precise control over where in the list each element is inserted.An object that maps keys to values.
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Classes in java.util used by java.awt.desktopClassDescriptionA tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.An ordered collection, where the user has precise control over where in the list each element is inserted.
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Classes in java.util used by java.awt.dndClassDescriptionResizable-array implementation of the
Listinterface.A tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.An iterator over a collection.An ordered collection, where the user has precise control over where in the list each element is inserted.TheTooManyListenersExceptionException is used as part of the Java Event model to annotate and implement a unicast special case of a multicast Event Source. -
Classes in java.util used by java.awt.eventClassDescriptionA tagging interface that all event listener interfaces must extend.An abstract wrapper class for an
EventListenerclass which associates a set of additional parameters with the listener.The root class from which all event state objects shall be derived. -
Classes in java.util used by java.awt.font
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Classes in java.util used by java.awt.im
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Classes in java.util used by java.awt.im.spiClassDescriptionA
Localeobject represents a specific geographical, political, or cultural region. -
Classes in java.util used by java.awt.image
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Classes in java.util used by java.awt.image.renderable
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Classes in java.util used by java.beansClassDescriptionAn object that implements the Enumeration interface generates a series of elements, one at a time.A tagging interface that all event listener interfaces must extend.An abstract wrapper class for an
EventListenerclass which associates a set of additional parameters with the listener.The root class from which all event state objects shall be derived. -
Classes in java.util used by java.beans.beancontextClassDescriptionResizable-array implementation of the
Listinterface.The root interface in the collection hierarchy.A tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.Hash table based implementation of theMapinterface.An iterator over a collection.ALocaleobject represents a specific geographical, political, or cultural region.TheTooManyListenersExceptionException is used as part of the Java Event model to annotate and implement a unicast special case of a multicast Event Source. -
ClassDescriptionAn object that implements the Enumeration interface generates a series of elements, one at a time.A
Localeobject represents a specific geographical, political, or cultural region. -
ClassDescriptionA comparison function, which imposes a total ordering on some collection of objects.An object that implements the Enumeration interface generates a series of elements, one at a time.An iterator over a collection.An ordered collection, where the user has precise control over where in the list each element is inserted.A
Localeobject represents a specific geographical, political, or cultural region.An object that maps keys to values.A container object which may or may not contain a non-nullvalue.ThePropertiesclass represents a persistent set of properties.Resource bundles contain locale-specific objects.A collection that contains no duplicate elements.An object for traversing and partitioning elements of a source. -
Classes in java.util used by java.lang.constant
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Classes in java.util used by java.lang.foreignClassDescriptionAn ordered collection, where the user has precise control over where in the list each element is inserted.A container object which may or may not contain a non-
nullvalue.An object for traversing and partitioning elements of a source. -
Classes in java.util used by java.lang.instrument
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Classes in java.util used by java.lang.invoke
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Classes in java.util used by java.lang.management
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Classes in java.util used by java.lang.moduleClassDescriptionThe root interface in the collection hierarchy.An ordered collection, where the user has precise control over where in the list each element is inserted.A container object which may or may not contain a non-
nullvalue.A collection that contains no duplicate elements. -
Classes in java.util used by java.lang.reflect
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ClassDescriptionAn instance of this class is used to generate a stream of pseudorandom numbers; its period is only 248.
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ClassDescriptionAn object that implements the Enumeration interface generates a series of elements, one at a time.An ordered collection, where the user has precise control over where in the list each element is inserted.An object that maps keys to values.A container object which may or may not contain a non-
nullvalue.A collection that contains no duplicate elements. -
Classes in java.util used by java.net.httpClassDescriptionAn ordered collection, where the user has precise control over where in the list each element is inserted.An object that maps keys to values.A container object which may or may not contain a non-
nullvalue.A container object which may or may not contain alongvalue. -
Classes in java.util used by java.nio.channels
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Classes in java.util used by java.nio.channels.spi
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Classes in java.util used by java.nio.charset
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Classes in java.util used by java.nio.charset.spi
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Classes in java.util used by java.nio.fileClassDescriptionThis exception may be thrown by methods that have detected concurrent modification of an object when such modification is not permissible.An iterator over a collection.An ordered collection, where the user has precise control over where in the list each element is inserted.An object that maps keys to values.A collection that contains no duplicate elements.
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Classes in java.util used by java.nio.file.attribute
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Classes in java.util used by java.nio.file.spi
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Classes in java.util used by java.securityClassDescriptionThe root interface in the collection hierarchy.The class
Daterepresents a specific instant in time, with millisecond precision.TheDictionaryclass is the abstract parent of any class, such asHashtable, which maps keys to values.An object that implements the Enumeration interface generates a series of elements, one at a time.This class implements a hash table, which maps keys to values.An ordered collection, where the user has precise control over where in the list each element is inserted.An object that maps keys to values.A map entry (key-value pair).ThePropertiesclass represents a persistent set of properties.An instance of this class is used to generate a stream of pseudorandom numbers; its period is only 248.A collection that contains no duplicate elements. -
Classes in java.util used by java.security.certClassDescriptionThe root interface in the collection hierarchy.The class
Daterepresents a specific instant in time, with millisecond precision.An iterator over a collection.An ordered collection, where the user has precise control over where in the list each element is inserted.An object that maps keys to values.A collection that contains no duplicate elements. -
Classes in java.util used by java.security.interfaces
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Classes in java.util used by java.security.spec
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ClassDescriptionThe
Calendarclass is an abstract class that provides methods for converting between a specific instant in time and a set ofcalendar fieldssuch asYEAR,MONTH,DAY_OF_MONTH,HOUR, and so on, and for manipulating the calendar fields, such as getting the date of the next week.The classDaterepresents a specific instant in time, with millisecond precision.An object that implements the Enumeration interface generates a series of elements, one at a time.An iterator over a collection.An object that maps keys to values.ThePropertiesclass represents a persistent set of properties. -
ClassDescriptionThe
Calendarclass is an abstract class that provides methods for converting between a specific instant in time and a set ofcalendar fieldssuch asYEAR,MONTH,DAY_OF_MONTH,HOUR, and so on, and for manipulating the calendar fields, such as getting the date of the next week.A comparison function, which imposes a total ordering on some collection of objects.Represents a currency.The classDaterepresents a specific instant in time, with millisecond precision.ALocaleobject represents a specific geographical, political, or cultural region.An object that maps keys to values.A collection that contains no duplicate elements.TimeZonerepresents a time zone offset, and also figures out daylight savings. -
Classes in java.util used by java.text.spiClassDescriptionA
Localeobject represents a specific geographical, political, or cultural region. -
ClassDescriptionA comparison function, which imposes a total ordering on some collection of objects.An ordered collection, where the user has precise control over where in the list each element is inserted.A
Localeobject represents a specific geographical, political, or cultural region.An object that maps keys to values.A collection that contains no duplicate elements. -
Classes in java.util used by java.time.chronoClassDescriptionA comparison function, which imposes a total ordering on some collection of objects.An ordered collection, where the user has precise control over where in the list each element is inserted.A
Localeobject represents a specific geographical, political, or cultural region.An object that maps keys to values.A collection that contains no duplicate elements. -
Classes in java.util used by java.time.format
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Classes in java.util used by java.time.temporal
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Classes in java.util used by java.time.zoneClassDescriptionAn ordered collection, where the user has precise control over where in the list each element is inserted.A
SortedMapextended with navigation methods returning the closest matches for given search targets.A collection that contains no duplicate elements. -
ClassDescriptionThis class provides a skeletal implementation of the
Collectioninterface, to minimize the effort required to implement this interface.This class provides a skeletal implementation of theListinterface to minimize the effort required to implement this interface backed by a "random access" data store (such as an array).This class provides a skeletal implementation of theMapinterface, to minimize the effort required to implement this interface.This class provides skeletal implementations of someQueueoperations.This class provides a skeletal implementation of theListinterface to minimize the effort required to implement this interface backed by a "sequential access" data store (such as a linked list).This class provides a skeletal implementation of theSetinterface to minimize the effort required to implement this interface.Resizable-array implementation of theDequeinterface.Resizable-array implementation of theListinterface.This class implements a decoder for decoding byte data using the Base64 encoding scheme as specified in RFC 4648 and RFC 2045.This class implements an encoder for encoding byte data using the Base64 encoding scheme as specified in RFC 4648 and RFC 2045.This class implements a vector of bits that grows as needed.TheCalendarclass is an abstract class that provides methods for converting between a specific instant in time and a set ofcalendar fieldssuch 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.Builderis used for creating aCalendarfrom various date-time parameters.The root interface in the collection hierarchy.A comparison function, which imposes a total ordering on some collection of objects.Represents a currency.The classDaterepresents a specific instant in time, with millisecond precision.A linear collection that supports element insertion and removal at both ends.TheDictionaryclass is the abstract parent of any class, such asHashtable, which maps keys to values.A state object for collecting statistics such as count, min, max, sum, and average.An object that implements the Enumeration interface generates a series of elements, one at a time.A specializedMapimplementation for use with enum type keys.A specializedSetimplementation for use with enum types.A tagging interface that all event listener interfaces must extend.Preview.ThisStringTemplate.ProcessorPREVIEW constructs aStringresult usingFormatterspecifications and values found in theStringTemplatePREVIEW.An interpreter for printf-style format strings.Enum forBigDecimalformatting.GregorianCalendaris a concrete subclass ofCalendarand provides the standard calendar system used by most of the world.Hash table based implementation of theMapinterface.This class implements theSetinterface, backed by a hash table (actually aHashMapinstance).This class implements a hash table, which maps keys to values.HexFormatconverts between bytes and chars and hex-encoded strings which may include additional formatting markup such as prefixes, suffixes, and delimiters.Unchecked exception thrown when a format string contains an illegal syntax or a format specifier that is incompatible with the given arguments.A state object for collecting statistics such as count, min, max, sum, and average.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 thePropertiesspecification.An iterator over a collection.Hash table and linked list implementation of theMapinterface, with well-defined encounter order.Hash table and linked list implementation of theSetinterface, with well-defined encounter order.Doubly-linked list implementation of theListandDequeinterfaces.An ordered collection, where the user has precise control over where in the list each element is inserted.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.ALocaleobject represents a specific geographical, political, or cultural region.Builderis used to build instances ofLocalefrom values configured by the setters.Enum for locale categories.This enum provides constants to select a filtering mode for locale matching.Enum for specifying the type defined in ISO 3166.This class expresses a Language Range defined in RFC 4647 Matching of Language Tags.A state object for collecting statistics such as count, min, max, sum, and average.An object that maps keys to values.A map entry (key-value pair).Signals that a resource is missing.ASortedMapextended with navigation methods returning the closest matches for given search targets.ASortedSetextended with navigation methods reporting closest matches for given search targets.Thrown by various accessor methods to indicate that the element being requested does not exist.Deprecated.Deprecated.This interface has been deprecated.A container object which may or may not contain a non-nullvalue.A container object which may or may not contain adoublevalue.A container object which may or may not contain anintvalue.A container object which may or may not contain alongvalue.A base type for primitive specializations ofIterator.An Iterator specialized fordoublevalues.An Iterator specialized forintvalues.An Iterator specialized forlongvalues.An unbounded priority queue based on a priority heap.ThePropertiesclass represents a persistent set of properties.A collection designed for holding elements prior to processing.An instance of this class is used to generate a stream of pseudorandom numbers; its period is only 248.Marker interface used byListimplementations to indicate that they support fast (generally constant time) random access.Resource bundles contain locale-specific objects.ResourceBundle.Controldefines a set of callback methods that are invoked by theResourceBundle.getBundlefactory methods during the bundle loading process.A simple text scanner which can parse primitive types and strings using regular expressions.A collection that has a well-defined encounter order, that supports operations at both ends, and that is reversible.A Map that has a well-defined encounter order, that supports operations at both ends, and that is reversible.A collection that is both aSequencedCollectionand aSet.A facility to load implementations of a service.Represents a service provider located byServiceLoader.A collection that contains no duplicate elements.AMapthat further provides a total ordering on its keys.ASetthat further provides a total ordering on its elements.An object for traversing and partitioning elements of a source.A Spliterator specialized fordoublevalues.A Spliterator specialized forintvalues.A Spliterator specialized forlongvalues.A Spliterator specialized for primitive values.A generator of uniform pseudorandom values (with period 264) applicable for use in (among other contexts) isolated parallel computations that may generate subtasks.StringJoineris used to construct a sequence of characters separated by a delimiter and optionally starting with a supplied prefix and ending with a supplied suffix.A task that can be scheduled for one-time or repeated execution by aTimer.TimeZonerepresents a time zone offset, and also figures out daylight savings.A class that represents an immutable universally unique identifier (UUID).TheVectorclass implements a growable array of objects.Hash table based implementation of theMapinterface, with weak keys. -
Classes in java.util used by java.util.concurrentClassDescriptionThis class provides a skeletal implementation of the
Collectioninterface, to minimize the effort required to implement this interface.This class provides a skeletal implementation of theMapinterface, to minimize the effort required to implement this interface.This class provides skeletal implementations of someQueueoperations.This class provides a skeletal implementation of theSetinterface to minimize the effort required to implement this interface.The root interface in the collection hierarchy.A comparison function, which imposes a total ordering on some collection of objects.A linear collection that supports element insertion and removal at both ends.An object that implements the Enumeration interface generates a series of elements, one at a time.An iterator over a collection.An ordered collection, where the user has precise control over where in the list each element is inserted.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.An object that maps keys to values.A map entry (key-value pair).ASortedMapextended with navigation methods returning the closest matches for given search targets.ASortedSetextended with navigation methods reporting closest matches for given search targets.A container object which may or may not contain a non-nullvalue.A collection designed for holding elements prior to processing.An instance of this class is used to generate a stream of pseudorandom numbers; its period is only 248.Marker interface used byListimplementations to indicate that they support fast (generally constant time) random access.A collection that has a well-defined encounter order, that supports operations at both ends, and that is reversible.A Map that has a well-defined encounter order, that supports operations at both ends, and that is reversible.A collection that is both aSequencedCollectionand aSet.A collection that contains no duplicate elements.AMapthat further provides a total ordering on its keys.ASetthat further provides a total ordering on its elements.An object for traversing and partitioning elements of a source. -
Classes in java.util used by java.util.concurrent.locksClassDescriptionThe root interface in the collection hierarchy.The class
Daterepresents a specific instant in time, with millisecond precision. -
Classes in java.util used by java.util.functionClassDescriptionA comparison function, which imposes a total ordering on some collection of objects.
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Classes in java.util used by java.util.jarClassDescriptionThe root interface in the collection hierarchy.An object that implements the Enumeration interface generates a series of elements, one at a time.An object that maps keys to values.A map entry (key-value pair).A collection that contains no duplicate elements.
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Classes in java.util used by java.util.loggingClassDescriptionAn object that implements the Enumeration interface generates a series of elements, one at a time.An ordered collection, where the user has precise control over where in the list each element is inserted.Resource bundles contain locale-specific objects.
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Classes in java.util used by java.util.prefsClassDescriptionA tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.
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Classes in java.util used by java.util.regex
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Classes in java.util used by java.util.spiClassDescriptionA
Localeobject represents a specific geographical, political, or cultural region.An object that maps keys to values.A container object which may or may not contain a non-nullvalue.Resource bundles contain locale-specific objects.ResourceBundle.Controldefines a set of callback methods that are invoked by theResourceBundle.getBundlefactory methods during the bundle loading process. -
Classes in java.util used by java.util.streamClassDescriptionThe root interface in the collection hierarchy.A comparison function, which imposes a total ordering on some collection of objects.A state object for collecting statistics such as count, min, max, sum, and average.A state object for collecting statistics such as count, min, max, sum, and average.An iterator over a collection.An ordered collection, where the user has precise control over where in the list each element is inserted.A state object for collecting statistics such as count, min, max, sum, and average.An object that maps keys to values.A container object which may or may not contain a non-
nullvalue.A container object which may or may not contain adoublevalue.A container object which may or may not contain anintvalue.A container object which may or may not contain alongvalue.A collection that contains no duplicate elements.An object for traversing and partitioning elements of a source.A Spliterator specialized fordoublevalues.A Spliterator specialized forintvalues.A Spliterator specialized forlongvalues. -
Classes in java.util used by java.util.zipClassDescriptionAn object that implements the Enumeration interface generates a series of elements, one at a time.
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Classes in java.util used by javax.accessibilityClassDescription
ListResourceBundleis an abstract subclass ofResourceBundlethat manages resources for a locale in a convenient and easy to use list.ALocaleobject represents a specific geographical, political, or cultural region.Resource bundles contain locale-specific objects.TheVectorclass implements a growable array of objects. -
Classes in java.util used by javax.annotation.processing
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Classes in java.util used by javax.imageioClassDescriptionAn iterator over a collection.An ordered collection, where the user has precise control over where in the list each element is inserted.A
Localeobject represents a specific geographical, political, or cultural region.A collection that contains no duplicate elements. -
Classes in java.util used by javax.imageio.event
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Classes in java.util used by javax.imageio.metadata
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Classes in java.util used by javax.imageio.plugins.bmpClassDescriptionA
Localeobject represents a specific geographical, political, or cultural region. -
Classes in java.util used by javax.imageio.plugins.jpegClassDescriptionA
Localeobject represents a specific geographical, political, or cultural region. -
Classes in java.util used by javax.imageio.plugins.tiff
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Classes in java.util used by javax.imageio.spi
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Classes in java.util used by javax.lang.modelClassDescriptionAn ordered collection, where the user has precise control over where in the list each element is inserted.
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Classes in java.util used by javax.lang.model.element
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Classes in java.util used by javax.lang.model.typeClassDescriptionAn ordered collection, where the user has precise control over where in the list each element is inserted.
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Classes in java.util used by javax.lang.model.util
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Classes in java.util used by javax.managementClassDescriptionThis class provides a skeletal implementation of the
Collectioninterface, to minimize the effort required to implement this interface.This class provides a skeletal implementation of theListinterface to minimize the effort required to implement this interface backed by a "random access" data store (such as an array).Resizable-array implementation of theListinterface.The root interface in the collection hierarchy.A tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.This class implements a hash table, which maps keys to values.An ordered collection, where the user has precise control over where in the list each element is inserted.An object that maps keys to values.Marker interface used byListimplementations to indicate that they support fast (generally constant time) random access.A collection that has a well-defined encounter order, that supports operations at both ends, and that is reversible.A collection that contains no duplicate elements.TheVectorclass implements a growable array of objects. -
Classes in java.util used by javax.management.loadingClassDescriptionAn object that implements the Enumeration interface generates a series of elements, one at a time.An ordered collection, where the user has precise control over where in the list each element is inserted.An object that maps keys to values.A collection that contains no duplicate elements.
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Classes in java.util used by javax.management.monitor
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Classes in java.util used by javax.management.openmbeanClassDescriptionThe root interface in the collection hierarchy.The class
Daterepresents a specific instant in time, with millisecond precision.An ordered collection, where the user has precise control over where in the list each element is inserted.An object that maps keys to values.A map entry (key-value pair).A collection that contains no duplicate elements. -
Classes in java.util used by javax.management.relationClassDescriptionThis class provides a skeletal implementation of the
Collectioninterface, to minimize the effort required to implement this interface.This class provides a skeletal implementation of theListinterface to minimize the effort required to implement this interface backed by a "random access" data store (such as an array).Resizable-array implementation of theListinterface.The root interface in the collection hierarchy.A tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.An ordered collection, where the user has precise control over where in the list each element is inserted.An object that maps keys to values.Marker interface used byListimplementations to indicate that they support fast (generally constant time) random access.A collection that has a well-defined encounter order, that supports operations at both ends, and that is reversible.TheVectorclass implements a growable array of objects. -
Classes in java.util used by javax.management.remoteClassDescriptionThe root class from which all event state objects shall be derived.An object that maps keys to values.
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Classes in java.util used by javax.management.remote.rmi
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Classes in java.util used by javax.management.timerClassDescriptionThe class
Daterepresents a specific instant in time, with millisecond precision.The root class from which all event state objects shall be derived.TheVectorclass implements a growable array of objects. -
Classes in java.util used by javax.namingClassDescriptionAn object that implements the Enumeration interface generates a series of elements, one at a time.This class implements a hash table, which maps keys to values.The
Propertiesclass represents a persistent set of properties.TheVectorclass implements a growable array of objects. -
Classes in java.util used by javax.naming.directory
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Classes in java.util used by javax.naming.eventClassDescriptionA tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.
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Classes in java.util used by javax.naming.ldapClassDescriptionAn object that implements the Enumeration interface generates a series of elements, one at a time.A tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.This class implements a hash table, which maps keys to values.An ordered collection, where the user has precise control over where in the list each element is inserted.
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Classes in java.util used by javax.naming.ldap.spi
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Classes in java.util used by javax.naming.spi
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Classes in java.util used by javax.net.sslClassDescriptionThe root interface in the collection hierarchy.An object that implements the Enumeration interface generates a series of elements, one at a time.A tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.An ordered collection, where the user has precise control over where in the list each element is inserted.A container object which may or may not contain a non-
nullvalue. -
Classes in java.util used by javax.print.attribute
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Classes in java.util used by javax.print.attribute.standardClassDescriptionThis class provides a skeletal implementation of the
Collectioninterface, to minimize the effort required to implement this interface.This class provides a skeletal implementation of theMapinterface, to minimize the effort required to implement this interface.This class provides a skeletal implementation of theSetinterface to minimize the effort required to implement this interface.The root interface in the collection hierarchy.The classDaterepresents a specific instant in time, with millisecond precision.Hash table based implementation of theMapinterface.This class implements theSetinterface, backed by a hash table (actually aHashMapinstance).ALocaleobject represents a specific geographical, political, or cultural region.An object that maps keys to values.A collection that contains no duplicate elements. -
Classes in java.util used by javax.print.event
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Classes in java.util used by javax.scriptClassDescriptionThe root interface in the collection hierarchy.An ordered collection, where the user has precise control over where in the list each element is inserted.An object that maps keys to values.A map entry (key-value pair).A collection that contains no duplicate elements.
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Classes in java.util used by javax.security.auth
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Classes in java.util used by javax.security.auth.callbackClassDescriptionA
Localeobject represents a specific geographical, political, or cultural region. -
Classes in java.util used by javax.security.auth.kerberosClassDescriptionThe class
Daterepresents a specific instant in time, with millisecond precision. -
Classes in java.util used by javax.security.auth.login
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Classes in java.util used by javax.security.auth.spi
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Classes in java.util used by javax.security.auth.x500
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Classes in java.util used by javax.security.certClassDescriptionThe class
Daterepresents a specific instant in time, with millisecond precision. -
Classes in java.util used by javax.security.saslClassDescriptionAn object that implements the Enumeration interface generates a series of elements, one at a time.An object that maps keys to values.
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Classes in java.util used by javax.smartcardioClassDescriptionAn ordered collection, where the user has precise control over where in the list each element is inserted.
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Classes in java.util used by javax.sound.midiClassDescriptionA tagging interface that all event listener interfaces must extend.An ordered collection, where the user has precise control over where in the list each element is inserted.An object that maps keys to values.The
Vectorclass implements a growable array of objects. -
Classes in java.util used by javax.sound.sampledClassDescriptionA tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.An object that maps keys to values.
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ClassDescriptionThe
Calendarclass is an abstract class that provides methods for converting between a specific instant in time and a set ofcalendar fieldssuch asYEAR,MONTH,DAY_OF_MONTH,HOUR, and so on, and for manipulating the calendar fields, such as getting the date of the next week.A tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.An object that maps keys to values. -
Classes in java.util used by javax.sql.rowsetClassDescriptionThe
Calendarclass is an abstract class that provides methods for converting between a specific instant in time and a set ofcalendar fieldssuch asYEAR,MONTH,DAY_OF_MONTH,HOUR, and so on, and for manipulating the calendar fields, such as getting the date of the next week.The root interface in the collection hierarchy.An object that maps keys to values. -
Classes in java.util used by javax.sql.rowset.serial
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Classes in java.util used by javax.sql.rowset.spiClassDescriptionAn object that implements the Enumeration interface generates a series of elements, one at a time.
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Classes in java.util used by javax.swingClassDescriptionThe root interface in the collection hierarchy.A comparison function, which imposes a total ordering on some collection of objects.The class
Daterepresents a specific instant in time, with millisecond precision.TheDictionaryclass is the abstract parent of any class, such asHashtable, which maps keys to values.An object that implements the Enumeration interface generates a series of elements, one at a time.A tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.This class implements a hash table, which maps keys to values.An ordered collection, where the user has precise control over where in the list each element is inserted.ALocaleobject represents a specific geographical, political, or cultural region.An object that maps keys to values.A collection that contains no duplicate elements.TheVectorclass implements a growable array of objects. -
Classes in java.util used by javax.swing.eventClassDescriptionA tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.
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Classes in java.util used by javax.swing.plaf.basicClassDescriptionA tagging interface that all event listener interfaces must extend.This class implements a hash table, which maps keys to values.The
Vectorclass implements a growable array of objects. -
Classes in java.util used by javax.swing.plaf.metal
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Classes in java.util used by javax.swing.plaf.multi
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Classes in java.util used by javax.swing.plaf.synth
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Classes in java.util used by javax.swing.tableClassDescriptionA comparison function, which imposes a total ordering on some collection of objects.An object that implements the Enumeration interface generates a series of elements, one at a time.A tagging interface that all event listener interfaces must extend.A
Localeobject represents a specific geographical, political, or cultural region.TheVectorclass implements a growable array of objects. -
Classes in java.util used by javax.swing.textClassDescriptionThe
Dictionaryclass is the abstract parent of any class, such asHashtable, which maps keys to values.An object that implements the Enumeration interface generates a series of elements, one at a time.A tagging interface that all event listener interfaces must extend.TheVectorclass implements a growable array of objects. -
Classes in java.util used by javax.swing.text.htmlClassDescriptionAn object that implements the Enumeration interface generates a series of elements, one at a time.A tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.The
Vectorclass implements a growable array of objects. -
Classes in java.util used by javax.swing.text.html.parserClassDescriptionThis class implements a vector of bits that grows as needed.An object that implements the Enumeration interface generates a series of elements, one at a time.This class implements a hash table, which maps keys to values.The
Vectorclass implements a growable array of objects. -
Classes in java.util used by javax.swing.treeClassDescriptionAn object that implements the Enumeration interface generates a series of elements, one at a time.A tagging interface that all event listener interfaces must extend.The root class from which all event state objects shall be derived.The
Vectorclass implements a growable array of objects. -
Classes in java.util used by javax.swing.undoClassDescriptionA tagging interface that all event listener interfaces must extend.This class implements a hash table, which maps keys to values.The
Vectorclass implements a growable array of objects. -
Classes in java.util used by javax.toolsClassDescriptionThe root interface in the collection hierarchy.An iterator over a collection.An ordered collection, where the user has precise control over where in the list each element is inserted.A
Localeobject represents a specific geographical, political, or cultural region.A facility to load implementations of a service.A collection that contains no duplicate elements. -
Classes in java.util used by javax.xml.crypto
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Classes in java.util used by javax.xml.crypto.dom
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Classes in java.util used by javax.xml.crypto.dsigClassDescriptionAn ordered collection, where the user has precise control over where in the list each element is inserted.
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Classes in java.util used by javax.xml.crypto.dsig.keyinfoClassDescriptionAn ordered collection, where the user has precise control over where in the list each element is inserted.
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Classes in java.util used by javax.xml.crypto.dsig.spec
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Classes in java.util used by javax.xml.datatypeClassDescriptionThe
Calendarclass is an abstract class that provides methods for converting between a specific instant in time and a set ofcalendar fieldssuch asYEAR,MONTH,DAY_OF_MONTH,HOUR, and so on, and for manipulating the calendar fields, such as getting the date of the next week.The classDaterepresents a specific instant in time, with millisecond precision.GregorianCalendaris a concrete subclass ofCalendarand provides the standard calendar system used by most of the world.ALocaleobject represents a specific geographical, political, or cultural region.TimeZonerepresents a time zone offset, and also figures out daylight savings. -
Classes in java.util used by javax.xml.namespace
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Classes in java.util used by javax.xml.stream
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Classes in java.util used by javax.xml.stream.events
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Classes in java.util used by javax.xml.stream.util
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Classes in java.util used by javax.xml.transform
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Classes in java.util used by javax.xml.xpath
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Classes in java.util used by jdk.dynalinkClassDescriptionAn ordered collection, where the user has precise control over where in the list each element is inserted.Error thrown when something goes wrong while locating, loading, or instantiating a service provider.
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Classes in java.util used by jdk.dynalink.beans
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Classes in java.util used by jdk.dynalink.linkerClassDescriptionAn ordered collection, where the user has precise control over where in the list each element is inserted.
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Classes in java.util used by jdk.dynalink.linker.supportClassDescriptionAn ordered collection, where the user has precise control over where in the list each element is inserted.
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Classes in java.util used by jdk.javadoc.doclet
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Classes in java.util used by jdk.jfr.consumer
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Classes in java.util used by jdk.jshellClassDescriptionThe root interface in the collection hierarchy.An ordered collection, where the user has precise control over where in the list each element is inserted.A
Localeobject represents a specific geographical, political, or cultural region.An object that maps keys to values.A collection that contains no duplicate elements. -
Classes in java.util used by jdk.jshell.execution
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Classes in java.util used by jdk.jshell.spi
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Classes in java.util used by jdk.jshell.tool
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Classes in java.util used by jdk.management.jfr
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Classes in java.util used by org.xml.saxClassDescriptionA
Localeobject represents a specific geographical, political, or cultural region. -
Classes in java.util used by org.xml.sax.helpersClassDescriptionAn object that implements the Enumeration interface generates a series of elements, one at a time.A
Localeobject represents a specific geographical, political, or cultural region.
Observerinterface have been deprecated.