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{{shortShort description|Wikipedia list articlenone}}
 
{{Multiple issues|
{{Citation style|date=December 2017|details=Violates Wikipedia:External links: "Wikipedia articles may include links to web pages outside Wikipedia (external links), but they should not normally be used in the body of an article."}}
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There are two types of [[Java (programming language)|Java programming language]] [[Application programming interface|application programming interfaces (APIs)]]:
 
* The official core Java API, contained in the Android (Google), SE (OpenJDK and Oracle), [[MicroEJ]]. These packages (java.* packages) are the core Java language packages, meaning that programmers using the Java language had to use them in order to make any worthwhile use of the Java language.
* Optional APIs that can be downloaded separately. The specification of these APIs are defined according to many different organizations in the world (Alljoyn, OSGi, Eclipse, JCP, E-S-R, etc.).
 
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| E-S-R consortium
| [http://www.e-s-r.net here]
|
|-
| [[Java Data Objects]]
| JDO
| A specification of Java object [[Persistence (computer science)|persistence]].
|
|-
| Android API
| Google
| [https://developer.android.com here]
|
|-
| [[JavaHelp]]
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| JNDI
| An API for [[directory service]]s.
|
|-
| [[JavaJakarta Persistence API]]
| JPA
| A specification for [[object-relational mapping]].
| [https://jcpjakarta.orgee/enspecifications/jsrpersistence/detail?id=338 JSRavailable 338here]
|-
| [[Java Speech API]]
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| [https://sourceforge.net/projects/javausbapiforwi/ available here]
|-
| RestFB
| Facebook4j
| (none)
| Facebook API wrapper in Java.
| [https://facebook4jrestfb.github.io/en/index.htmlcom available here]
|-
| Twitter4j
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| Java library for the Discord API
| [https://github.com/DV8FromTheWorld/JDA available here]
|-
| Mixin
| SpongePowered
| This library adds ability to change existing code
| [https://github.com/SpongePowered/Mixin available here]
|-
| Wikipedia4j
| llmjava
| It's a library that you can use to search and retrieve documents from Wikipedia
| [https://github.com/llmjava/wikipedia4j available here]
|-
| Oshi
| oshi
| Library for working with [[Computer]] components and their parameters
| [https://github.com/oshi/oshi available here]
|-
| [[Google Guava|Guava]]
| Google
| A set of core Java libraries for collections, caching, primitives support, and more.
| [https://github.com/google/guava available here]
|-
| [[Apache Commons]]
| Apache
| A collection of reusable Java components, including utilities for collections, math, IO, and more.
| [https://commons.apache.org/ available here]
|-
| [[Log4j]]
| Apache
| A widely used Java logging library.
| [https://logging.apache.org/log4j/ available here]
|-
| [[JUnit]]
| JUnit
| A widely used testing framework for Java.
| [https://junit.org available here]
|-
| Caffeine
| (none)
| A high-performance caching library for Java.
| [https://github.com/ben-manes/caffeine available here]
|-
| Lombok
| (none)
| A Java library that reduces boilerplate code with annotations.
| [https://projectlombok.org available here]
|-
| [[SLF4J]]
| (none)
| A simple logging facade for Java, often used with Logback or Log4j.
| [https://www.slf4j.org available here]
|-
| Retrofit
| (none)
| A type-safe HTTP client for Java and Android.
| [https://square.github.io/retrofit/ available here]
|-
| OkHttp
| Square
| An HTTP client for Java with features like connection pooling and GZIP compression.
| [https://square.github.io/okhttp/ available here]
|-
| [[Gson]]
| Google
| A library for converting Java objects to JSON and back.
| [https://github.com/google/gson available here]
|-
| [[Jackson (API)|Jackson]]
| FasterXML
| A high-performance JSON processing library.
| [https://github.com/FasterXML/jackson available here]
|-
| Kryo
| EsotericSoftware
| A fast and efficient object graph serialization framework.
| [https://github.com/EsotericSoftware/kryo available here]
|-
| [[Apache Kafka]]
| Apache
| A distributed event streaming platform.
| [https://kafka.apache.org/ available here]
|-
| [[Netty (software)|Netty]]
| (none)
| An asynchronous event-driven network application framework.
| [https://netty.io available here]
|-
| [[Vert.x]]
| Eclipse
| A reactive toolkit for building distributed applications.
| [https://vertx.io available here]
|-
| [[Spring Framework]]
| Spring
| A powerful framework for building Java applications.
| [https://spring.io/ available here]
|-
| [[Micronaut (framework)|Micronaut]]
| (none)
| A lightweight framework for building microservices and cloud-native apps.
| [https://micronaut.io available here]
|-
| [[Hibernate (framework)|Hibernate]]
| (none)
| A powerful ORM (Object-Relational Mapping) framework.
| [https://hibernate.org/ available here]
|-
| Forge
| (none)
| A popular Minecraft modding API for Java Edition.
| [https://files.minecraftforge.net/ available here]
|-
| NeoForge
| (none)
| A community-driven fork of Forge for Minecraft modding.
| [https://github.com/NeoForged/ available here]
|-
| Fabric
| (none)
| A lightweight, modular Minecraft modding toolchain.
| [https://fabricmc.net/ available here]
|-
| Quilt
| (none)
| A community-driven fork of Fabric with additional features.
| [https://quiltmc.org/ available here]
|}
 
 
{| class="wikitable" style="text-align: center"
 
{| class="wikitable"
|-
! Name
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! [[Java package]](s) that contain the API
|-
| [[JavaBeansJakarta Activation Framework]]
| JAF
| javax<code>jakarta.activation</code>
|-
| [[JavaMailJakarta Mail]]
| (none)
| javax<code>jakarta.mail</code>
|-
| [[JavaJakarta Message ServiceMessaging]]
| JMS
| javax<code>jakarta.jms</code>
|-
| [[JavaServerJakarta Faces]]
| JSF
| javax<code>jakarta.faces</code>
|}
 
{| class="wikitable" style="text-align:center"
|-
! Name
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! Available from
|-
| [[JAX-RPC|Java API forJakarta XML-Based RPC]]
| JAX-RPC
| [https://jakarta.ee/specifications/xml-rpc/ here] and [https://github.com/eclipse-ee4j/jax-rpc-ri here]
| [http://java.sun.com/xml/downloads/jaxrpc.html available here]
|-
| [[XQuery API for Java]]
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|}
 
{| class="wikitable" style="text-align: center"
|-
! Name
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| [http://www.stm32java.com available here]
|-
| [[MicroEJ]] embedded platform
| MicroEJ
| [https://www.microej.com/ available here]
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Following is a very incomplete list, as the number of APIs available for the Java platform is overwhelming.
 
;[[Rich Clientclient platform|Rich client platforms]]
* [[Eclipse (software)|Eclipse Rich Client Platform (RCP)]]
* [[NetBeans|NetBeans Platform]]
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plugged into the VM) and by providing for areas of memory
that are not subject to garbage collection, along with threads that are
not preemptablepreempt able by the garbage collector. These areas are instead
managed using region-based memory management.
 
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;Windowing libraries
The windowing library is a set of classes available in the Streams Processing Language (SPL) Runtime C++ API and the SPL Java™ Operator API. The library is used to implement primitive operators that need windows following the SPL window semantics. Using the windowing library provides a consistent window policy semantic across operators, and simplifies the operator implementation.
 
SPL offers both tumbling and sliding windows. Both types of windows keep all the incoming data in memory until its tuple eviction policy triggers. Use the SPL support for windows when the functionality required by the primitive operator can be built using the semantics provided by SPL window constructs.
 
One example operator from the SPL Standard Toolkit that uses the windowing library and syntax is the <kbd>Aggregate</kbd> operator. An example operator that buffers recently received tuples but that does not use the windowing library and syntax is the <kbd>DeDuplicate</kbd> operator. This action occurs because this operator has different eviction and trigger semantics than the ones provided by SPL. This operator needs to maintain only unique tuples and discards all repeated tuples that are received within a time window.
 
With the windowing library, developers can specify different eviction and trigger policies but can implement the event handling actions independently of the window policy details. There are a few differences when implementing primitive operators in C++ and Java that take advantage of the SPL window clause.
 
In the C++ implementation, developers have no obligation to use the window library (the preferred practice is to use library). They are free to use the SPL Operator Code Generation API just to get the specified window policy for a given operator instance. Then, they can generate code using other containers. In addition, developers can check for valid window configurations during code generation time.
 
In the Java implementation, developers must use the window library. This action can be achieved by registering a class that implements <kbd>com.ibm.streams.operator.window.StreamWindowListener<T></kbd> that handles events generated by a window <kbd>(com.ibm.streams.operator.window.StreamWindow<T></kbd>). This use is required because Java operators are not based on code generation. As a result, windows are automatically managed by the runtime to guarantee SPL window semantics. Developers can check for valid window configurations during runtime by checking the window policy associated to a given input port.
* [[Standard Widget Toolkit]] (SWT)
 
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==See also==
* [[Java (software platform)|Java Platform]]
* [[Application programming interface]]
* [[Java ConcurrentMap]]
* [[List of Java Frameworksframeworks]]
 
==Notes==
{{reflist}}
 
==External links==
Retrieved from "https://en.wikipedia.org/wiki/List_of_Java_APIs"