Java api all classes

How This API Document Is Organized

This API (Application Programming Interface) document has pages corresponding to the items in the navigation bar, described as follows.

Overview

Package

• Interfaces (italic)
• Classes
• Enums
• Exceptions
• Errors
• Annotation Types

Class/Interface

• Class inheritance diagram
• Direct Subclasses
• All Known Subinterfaces
• All Known Implementing Classes
• Class/interface declaration
• Class/interface description

• Nested Class Summary
• Field Summary
• Constructor Summary
• Method Summary

• Field Detail
• Constructor Detail
• Method Detail

Each summary entry contains the first sentence from the detailed description for that item. The summary entries are alphabetical, while the detailed descriptions are in the order they appear in the source code. This preserves the logical groupings established by the programmer.

Annotation Type

• Annotation Type declaration
• Annotation Type description
• Required Element Summary
• Optional Element Summary
• Element Detail

Enum

• Enum declaration
• Enum description
• Enum Constant Summary
• Enum Constant Detail

Use

Tree (Class Hierarchy)

• When viewing the Overview page, clicking on «Tree» displays the hierarchy for all packages.
• When viewing a particular package, class or interface page, clicking «Tree» displays the hierarchy for only that package.

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JavaDoc Help

Starting from the Overview page, you can browse the documentation using the links in each page, and in the navigation bar at the top of each page. The Index and Search box allow you to navigate to specific declarations and summary pages, including: All Packages, All Classes and Interfaces

Search

You can search for definitions of modules, packages, types, fields, methods, system properties and other terms defined in the API, using some or all of the name, optionally using «camelCase» abbreviations. For example:

• j.l.obj will match «java.lang.Object»
• InpStr will match «java.io.InputStream»
• HM.cK will match «java.util.HashMap.containsKey(Object)»

Refer to the Javadoc Search Specification for a full description of search features.

Kinds of Pages

Overview

The Overview page is the front page of this API document and provides a list of all modules with a summary for each. This page can also contain an overall description of the set of modules.

Module

Each module has a page that contains a list of its packages, dependencies on other modules, and services, with a summary for each. These pages may contain the following categories:

Package

Each package has a page that contains a list of its classes and interfaces, with a summary for each. These pages may contain the following categories:

• Interfaces
• Classes
• Enum Classes
• Exceptions
• Errors
• Annotation Interfaces

Class or Interface

Each class, interface, nested class and nested interface has its own separate page. Each of these pages has three sections consisting of a declaration and description, member summary tables, and detailed member descriptions. Entries in each of these sections are omitted if they are empty or not applicable.

• Class Inheritance Diagram
• Direct Subclasses
• All Known Subinterfaces
• All Known Implementing Classes
• Class or Interface Declaration
• Class or Interface Description

• Nested Class Summary
• Enum Constant Summary
• Field Summary
• Property Summary
• Constructor Summary
• Method Summary
• Required Element Summary
• Optional Element Summary

• Enum Constant Details
• Field Details
• Property Details
• Constructor Details
• Method Details
• Element Details

Note: Annotation interfaces have required and optional elements, but not methods. Only enum classes have enum constants. The components of a record class are displayed as part of the declaration of the record class. Properties are a feature of JavaFX.

The summary entries are alphabetical, while the detailed descriptions are in the order they appear in the source code. This preserves the logical groupings established by the programmer.

Other Files

Packages and modules may contain pages with additional information related to the declarations nearby.

Use

Each documented package, class and interface has its own Use page. This page describes what packages, classes, methods, constructors and fields use any part of the given class or package. Given a class or interface A, its Use page includes subclasses of A, fields declared as A, methods that return A, and methods and constructors with parameters of type A. You can access this page by first going to the package, class or interface, then clicking on the USE link in the navigation bar.

Tree (Class Hierarchy)

There is a Class Hierarchy page for all packages, plus a hierarchy for each package. Each hierarchy page contains a list of classes and a list of interfaces. Classes are organized by inheritance structure starting with java.lang.Object . Interfaces do not inherit from java.lang.Object .

• When viewing the Overview page, clicking on TREE displays the hierarchy for all packages.
• When viewing a particular package, class or interface page, clicking on TREE displays the hierarchy for only that package.

Preview API

The Preview API page lists all of the Preview APIs. Preview APIs may be removed in future implementations.

New API

The New API page lists APIs that have been added in recent releases.

Deprecated API

The Deprecated API page lists all of the API that have been deprecated. A deprecated API is not recommended for use, generally due to shortcomings, and a replacement API is usually given. Deprecated APIs may be removed in future implementations.

Constant Field Values

The Constant Field Values page lists the static final fields and their values.

Serialized Form

Each serializable or externalizable class has a description of its serialization fields and methods. This information is of interest to those who implement rather than use the API. While there is no link in the navigation bar, you can get to this information by going to any serialized class and clicking «Serialized Form» in the «See Also» section of the class description.

System Properties

The System Properties page lists references to system properties.

All Packages

The All Packages page contains an alphabetic index of all packages contained in the documentation.

All Classes and Interfaces

The All Classes and Interfaces page contains an alphabetic index of all classes and interfaces contained in the documentation, including annotation interfaces, enum classes, and record classes.

Index

The Index contains an alphabetic index of all classes, interfaces, constructors, methods, and fields in the documentation, as well as summary pages such as All Packages, All Classes and Interfaces.

Report a bug or suggest an enhancement
For further API reference and developer documentation see the Java SE Documentation, which contains more detailed, developer-targeted descriptions with conceptual overviews, definitions of terms, workarounds, and working code examples. Other versions.
Java is a trademark or registered trademark of Oracle and/or its affiliates in the US and other countries.
Copyright © 1993, 2023, Oracle and/or its affiliates, 500 Oracle Parkway, Redwood Shores, CA 94065 USA.
All rights reserved. Use is subject to license terms and the documentation redistribution policy.

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Module java.base

Defines the foundational APIs of the Java SE Platform. Providers: The JDK implementation of this module provides an implementation of the jrt file system provider to enumerate and read the class and resource files in a run-time image. The jrt file system can be created by calling FileSystems.newFileSystem(URI.create(«jrt:/»)) . Tool Guides: java launcher, keytool

Packages

The java.lang.invoke package provides low-level primitives for interacting with the Java Virtual Machine.

Classes to support module descriptors and creating configurations of modules by means of resolution and service binding.

Provides reference-object classes, which support a limited degree of interaction with the garbage collector.

Provides classes for performing arbitrary-precision integer arithmetic ( BigInteger ) and arbitrary-precision decimal arithmetic ( BigDecimal ).

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.

Defines interfaces and classes for the Java virtual machine to access files, file attributes, and file systems.

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 handling text, dates, numbers, and messages in a manner independent of natural languages.

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.

Interfaces and classes providing a framework for locking and waiting for conditions that is distinct from built-in synchronization and monitors.

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.

Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.

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 the classes that should be used to store X500 Principal and X500 Private Credentials in a Subject.

Services

An abstract class for service providers that provide concrete implementations of the BreakIterator class.

An abstract class for service providers that provide localized string representations (display names) of Calendar field values.

An abstract class for service providers that provide localized currency symbols and display names for the Currency class.

An abstract class for service providers that provide concrete implementations of the DateFormat class.

An abstract class for service providers that provide concrete implementations of the NumberFormat class.

This class represents a «provider» for the Java Security API, where a provider implements some or all parts of Java Security.

The LoggerFinder service is responsible for creating, managing, and configuring loggers to the underlying framework it uses.

An abstract class for service providers that provide localized time zone names for the TimeZone class.

An interface for command-line tools to provide a way to be invoked without necessarily starting a new VM.

Report a bug or suggest an enhancement
For further API reference and developer documentation see the Java SE Documentation, which contains more detailed, developer-targeted descriptions with conceptual overviews, definitions of terms, workarounds, and working code examples.
Java is a trademark or registered trademark of Oracle and/or its affiliates in the US and other countries.
Copyright © 1993, 2023, Oracle and/or its affiliates, 500 Oracle Parkway, Redwood Shores, CA 94065 USA.
All rights reserved. Use is subject to license terms and the documentation redistribution policy.

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