List of Java APIs
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There are two types of Java programming language 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.).
The following is a partial list of application programming interfaces (APIs) for Java.
APIs
| Name | Acronym | Description and Version History | Available from |
|---|---|---|---|
| Java Advanced Imaging | JAI | A set of interfaces that support a high-level programming model allowing to manipulate images easily. | |
| Association for the standardization of embedded platforms | E-S-R consortium | ||
| Java Data Objects | JDO | A specification of Java object persistence. | |
| Android API | |||
| JavaHelp | A full-featured, extensible help system that enables you to incorporate online help in applets, components, applications, operating systems, and devices. | ||
| Java Media Framework | JMF | An API that enables audio, video and other time-based media to be added to Java applications and applets. | |
| Java Naming and Directory Interface | JNDI | An API for directory services. | |
| Jakarta Persistence | JPA | A specification for object-relational mapping. | |
| Java Speech API | JSAPI | This API allows for speech synthesis and speech recognition. | |
| Java 3D | J3D | A scene graph-based 3D API. | |
| Java OpenGL | JOGL | A wrapper library for OpenGL. | |
| Java USB for Windows | (none) | A USB communication of Java applications | |
| RestFB | (none) | Facebook API wrapper in Java. | |
| Twitter4j | (none) | Java library for the Twitter API | |
| Discord Java API | JDA | Java library for the Discord API | |
| Mixin | SpongePowered | This library adds ability to change existing code | |
| Wikipedia4j | llmjava | It's a library that you can use to search and retrieve documents from Wikipedia | |
| Oshi | oshi | Library for working with Computer components and their parameters | |
| Guava | A set of core Java libraries for collections, caching, primitives support, and more. | ||
| Apache Commons | Apache | A collection of reusable Java components, including utilities for collections, math, IO, and more. | |
| Log4j | Apache | A widely used Java logging library. | |
| JUnit | JUnit | A widely used testing framework for Java. | |
| Caffeine | (none) | A high-performance caching library for Java. | |
| Lombok | (none) | A Java library that reduces boilerplate code with annotations. | |
| SLF4J | (none) | A simple logging facade for Java, often used with Logback or Log4j. | |
| Retrofit | (none) | A type-safe HTTP client for Java and Android. | |
| OkHttp | Square | An HTTP client for Java with features like connection pooling and GZIP compression. | |
| Gson | A library for converting Java objects to JSON and back. | ||
| Jackson | FasterXML | A high-performance JSON processing library. | |
| Kryo | EsotericSoftware | A fast and efficient object graph serialization framework. | |
| Apache Kafka | Apache | A distributed event streaming platform. | |
| Netty | (none) | An asynchronous event-driven network application framework. | |
| Vert.x | Eclipse | A reactive toolkit for building distributed applications. | |
| Spring Framework | Spring | A powerful framework for building Java applications. | |
| Micronaut | (none) | A lightweight framework for building microservices and cloud-native apps. | |
| Hibernate | (none) | A powerful ORM (Object-Relational Mapping) framework. | |
| Forge | (none) | A popular Minecraft modding API for Java Edition. | |
| NeoForge | (none) | A community-driven fork of Forge for Minecraft modding. | |
| Fabric | (none) | A lightweight, modular Minecraft modding toolchain. | |
| Quilt | (none) | A community-driven fork of Fabric with additional features. |
| Name | Acronym | Java package(s) that contain the API |
|---|---|---|
| Jakarta Activation | JAF | jakarta.activation |
| Jakarta Mail | (none) | jakarta.mail |
| Jakarta Messaging | JMS | jakarta.jms |
| Jakarta Faces | JSF | jakarta.faces |
| Name | Acronym | Available from |
|---|---|---|
| Jakarta XML RPC | JAX-RPC | and |
| XQuery API for Java | XQJ | and |
| Name | Acronym | Available from |
|---|---|---|
| Connected Limited Device Configuration | CLDC | Reference implementation is |
| Java Telephony API | JTAPI | |
| STM32 Java technology | STM32Java | |
| MicroEJ embedded platform | MicroEJ |
Following is a very incomplete list, as the number of APIs available for the Java platform is overwhelming.
Office_compliant libraries
- Apache POI
- JXL - for Microsoft Excel
- JExcel - for Microsoft Excel
Compression
JSON
Game engines
- Slick
- jMonkey Engine
- JPCT Engine
- LWJGL
Real-time libraries
Real time Java is a catch-all term for a combination of technologies that allows programmers to write programs that meet the demands of real-time systems in the Java programming language.
Java's sophisticated memory management, native support for threading and concurrency, type safety, and relative simplicity have created a demand for its use in many domains. Its capabilities have been enhanced to support real time computational needs:
- Java supports a strict priority based threading model.
- Because Java threads support priorities, Java locking mechanisms support priority inversion avoidance techniques, such as priority inheritance or the priority ceiling protocol.
To overcome typical real time difficulties, the Java Community introduced a specification for real-time Java, JSR001. A number of implementations of the resulting Real-Time Specification for Java (RTSJ) have emerged, including a reference implementation from Timesys, IBM's WebSphere Real Time, Sun Microsystems's Java SE Real-Time Systems,[1] Aonix PERC or JamaicaVM from aicas.
The RTSJ addressed the critical issues by mandating a minimum (only two) specification for the threading model (and allowing other models to be plugged into the VM) and by providing for areas of memory that are not subject to garbage collection, along with threads that are not preempt able by the garbage collector. These areas are instead managed using region-based memory management.
Real-Time Specification for Java
The Real-Time Specification for Java (RTSJ) is a set of interfaces and behavioral refinements that enable real-time computer programming in the Java programming language. RTSJ 1.0 was developed as JSR 1 under the Java Community Process, which approved the new standard in November, 2001. RTSJ 2.0 is being developed under JSR 282. A draft version is available at JSR 282 JCP Page. More information can be found at RTSJ 2.0
Windowing libraries
- Standard Widget Toolkit (SWT)
Physics libraries
- JBox2D
- JBullet
- dyn4j