List of Java APIs


There are two types of Java programming language application programming interfaces :
The following is a partial list of application programming interfaces for Java.

APIs

NameAcronymJava package that contain the API
JavaBeans Activation FrameworkJAFjavax.activation
JavaMailjavax.mail
Java Message ServiceJMSjavax.jms
JavaServer FacesJSFjavax.faces

NameAcronymAvailable from
Java API for XML-Based RPCJAX-RPC
XQuery API for JavaXQJ and

NameAcronymAvailable from
Connected Limited Device ConfigurationCLDCReference implementation is
Java Telephony APIJTAPI
STM32 Java technologySTM32Java
MicroEJ embedded platformMicroEJ

Following is a very incomplete list, as the number of APIs available for the Java platform is overwhelming.
;Rich Client platforms
;Office_compliant libraries
;Compression
;JSON
;Game engines
;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:
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 have emerged, including a reference implementation from Timesys, IBM's WebSphere Real Time, Sun Microsystems's Java SE Real-Time Systems, Aonix PERC or JamaicaVM from aicas.
The RTSJ addressed the critical issues by mandating a minimum
specification for the threading model and by providing for areas of memory
that are not subject to garbage collection, along with threads that are
not preemptable 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 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
The windowing library is a set of classes available in the Streams Processing Language 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 Aggregate operator. An example operator that buffers recently received tuples but that does not use the windowing library and syntax is the DeDuplicate 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. 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 com.ibm.streams.operator.window.StreamWindowListener that handles events generated by a window . 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.
;Physics libraries
  • JBox2D
  • JBullet
  • dyn4j