Class Libraries

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» A Text User Interface for the Java AWT - Renders Java 1.1 GUIs written in AWT that do not implement custom graphics to a text console. [Open Source]
» Amber Archer - Includes classfile parser and writer, reloading classloader, UNIX syslog client protocol, an asynchronously updated Map, and cache and pool framework support. [Open source, GPL]
» Applicet - Framework for Applets and Applications. It replaces java.applet.Applet as superclass and includes easy-to-use Internationalization support. [Commercial/Freeware]
» Ataraxia - A generic internet gaming framework in Java providing a complete client/server and peer to peer networking and messaging layer and a modular game generation toolkit with particular effort on the card games. [Open source, GPL]
» BaseSys - A collection of Java packages. Over 100 classes among 11 packages offering from simple sort Vector to complex consistent framework for managing nested data structures independent from the data source. [Commercial]
» Blackwood - Integrating the Java platform with Mozilla. Features include a bridge to XPCOM, a Java DOM API, the Open JVM Integration (OJI) facility, a Java WebClient API, Plug-ins implemented in Java, called 'Pluglets', and embedding the layout engine into Java appli
» Bluefish Rules Engine - Simple Java/XML rules engine suitable for personalization, workflow, and business rules. [Open Source]
» Byte Iterator class - Allows treating a byte array as a file. [Open Source, GPL]
» Coroutine Package in Java - An implementation of coroutines using Java 1.0 and threads - ported from a C version. [Freeware]
» CreditCardPack - Provides EJB, GUI and non GUI components related to credit card data and data validation. By Keyoti Software.
» Flux, the Enterprise Job Scheduling Component - Performs job and task scheduling in Java and Java 2 Enterprise Edition (J2EE) environments [Commercial]
» GenerationJava - Generic collection of Java support classes. [Open Source]
» ICEsoft - ICEbrowser (HTML component for internet browsing in Java), ICEbox (a mail component), ICEtoolkit (a GUI toolkit based on lightweight AWT components) and ICEssl (a module provides support for secure networking over the Internet, and full support for both S
» ILOG JRules - A business rule engine class library.
» JBeans - A complete re-implementation of the java.beans packages. This project builds on the deficiencies of the Sun implementation to provide developers with a set of tools that can be used in everyday practice. The JBeans project provides more support for gettin
» JBrix Java Components - Open-source java libraries, in particular GUI, speech-recognition, and XML related components.
» JDollars - A Java class library for credit card transaction processing. [Open source, BSD License]
» JDring - Java Alarm Scheduler - Task scheduling system for Java, similar to Unix cron and at daemons. Fires events at specified times. Alarms are added dynamically in any order and can be one-shot or repetitive. [Open Source, LPGL]
» JET API - Java libraries and Java Beans providing access to 3270 and 6530 mainframe hosts.
» JFreeReport - A Java class library for generating reports. It provides a flexible printing functionality for Java applications and supports output to Printers and PDF, Excel, HTML and XHTML, PlainText, XML and CSV files. [Open source, LGPL]
» JGraphT - A class library that provides mathematical graph-theory objects and algorithms. JGraphT supports a rich gallery of graphs and is designed to be powerful, extensible and easy to use. [Open source, LGPL]
» JMAC - A Java implementation of Monkey's Audio Compression decoder. It is a Java library that decodes, converts and plays Monkey's Audio files (.MAC, .APL, .APE) in real time. JMAC doesn't need JMF. It runs under J2SE. [Open source, LGPL]
» JRoots - Java Application Framework for business development. [Freeware]
» JSDL (Java for SDL) - A binding for SDL (Simple DirectMedia Layer) written in java. Now you can use SDL and still program with Java. [Open source, LGPL]
» JTemporal - A framework of components providing functionality for time related applications (for the moment instant, period, mediators managing temporal associations). [Open source, LGPL]
» JThreadKit - Multithreading collection that provides common wrappers and synchronized implementations. [Commercial w/ demo]
» JViewPro - Report generator and print preview JavaBean.
» JWAM Framework - Java-based object-oriented framework for interactive business applications. By APCON WPS. [Framework is commercial; other components are open source, BSD-like]
» Jakarta Commons - Collection of open source reusable Java components from the Apache/Jakarta community.
» Java Addition to Default Environment (JADE) - Customizable XML support, generic Matrix class, and automatic error calculation. [Open Source, LGPL]
» Java Caching Service - Implementation of the JSR-107 JCache API. Its aim is to provide an open source alternative to commercial jcache implementations and deliver a fast distributed caching mechanism for java and j2ee. [Open source, LGPL]
» Java Collection Framework Toolbox - Utility classes for the java collections framework. [Open source, GPL or LGPL]
» Java Generic Libraries (JGL) - Class libraries that extend JDK libraries, providing many commonly-used algorithms and data structures. By Recursion Software, Inc. [Commercial]
» Java Printing Library - This library adds a higher layer of abstraction to the standard Java print API. It has an opened architecture and simplifies the printing of complex components (e.g. tables) and reports. An interactive print preview is also included.
» Java Web Browser and XML Viewer - Clue Web Browser Components power Java applications to display HTML. HTML-XML Dual Viewer help developers to display both HTML and XML with a single Java component. [commercial]
» JavaThis Utilities - Java class library. The main objective is to provide a cross platform, multi-language set of utilities for use with Java applications.
» Lava Rocks - Utilities such as printf, array manipulation, console mode dialogs, file management, text, and DES crypto. [Commercial]
» MD5 Hashing Class/Utility - Computes the MD5 hash of arrays of bytes. Can also be used in command-line mode. [Open Source, Public Domain]
» Mandarax - A Java class library for deduction rules. It provides an infrastructure for defining, managing and querying rule engine bases. [Open source, LGPL]
» Mango - A Java library consisting of a number of iterators, algorithms and functions, loosely inspired by the C++ Standard Template Library. [Open source, LGPL]
» Marauroa - A Java framework for creating online multiplayer games. [Open source, GPL]
» Millstone UI library - A user interface library for development of networked Java applications. It provides a terminal independent component model that can be adapted to different terminal types and user interface themes. [Open source, LGPL]
» My Java Tools - General purpose Java tools libraries: Lib (Objects, Strings, Files, FileFormat, Web, Tools, ZipInput); run - a Java application that runs code from a URL; jsp - Universal JSP turns JSP language into Macro; Practical XML - a very simple XML library.
» NovoSoft UML Library - Provides the following services: implementation of complete UML 1.3 physical metamodel, easy to use interfaces, event notification, undo/redo support, reflective API, XMI loading/saving. [Open Source, LGPL]
» Open Geospatial Datastore Interface (OGDI) for Java - A simple API that facilitates connectivity with various geospatial information data formats and/or products.
» Orbital library - A class library providing object-oriented representations and algorithms for logic, mathematics and artificial intelligence. It comprises theorem proving, computer algebra, search and planning, as well as learning algorithms.
» Package util.concurrent - This package provides standardized, efficient versions of utility classes commonly encountered in concurrent Java programming. It mainly consists of implementations of a few interfaces. [Open Source, Public Domain]
» PooliT - Generic, extensible object-pooling library to cut down on object creation and garbage collection, thus improving performance. [Open Source, LGPL]
» PortAudio - A cross platform audio I/O library. [Open source]
» Primitive Collections for Java - A collections framework for primitive Java types. The framework supports all primitive types and includes bridges to the standard Java Collections Framework. [Open source, LGPL]
» Programmer's Friend - Java utility libraries for text, IO, XML, database. Online javadocs. [Open source]
» Protomatter - A collection of (hopefully) useful Open Source Java classes, including Syslog, JDBC Connection Pool, PAS - a lightweight application server framework, Object Pooling Framework. Also Base64 encoder/decoder, blocking queues, work queues, mutex locks utilit
» RealObjects Edit-on Pro - A WYSIWYG editor applet/component. Provides word processor-like features, like a spelling checker, for XHTML markup creation.
» Side of Software Java Libraries - Offers libraries for the Java platform, such as dated collections, print preview, report visualization, and an OODB. [Commercial]
» Smartproxy - A library to dynamically create proxy classes and instances. Features an introduction to the library, download links and some documentation. [Open source, BSD License]
» Style Report Pro - An advanced printing/report generation package for Java applications and applets. The core of Style Report/Pro is a Java class/Java bean library with a powerful API. It support PDF/RTF/HTML generation, charting, grouping/summarization and high performance
» Talkative - Set of Java, COM and JavaScript libraries which together can provide connectivity between all kinds of applications. [Open Source, GPL]
» The VNet Class Library - Collection of useful Java classes, including an XML generator and a simple editor. [Open Source, GPL]
» The metaXa Project - A meta architecture for the Java virtual machine.
» ThreadWorks - A Java API that facilitates development and support of multi-threaded applications.
» Universal Resource Library - An extendable implementation of the NetBeans Filesystems API providing transparent access to local, JAR, CVS, XML and FTP filesystems. [Open Source, MPL-like]
» Verge Archemedia Labs - Offers Tempo a software component that performs job scheduling and job queuing for J2EE applications. [Commercial]
» WEBsina - JLicense is a Java utility library for creating and validating license keys. AuthToken is Java utility library for generating and validating authentication tokens (i.e., an encrypt string). [Freeware, pay for sources]
» Windward Reports - A J2EE report engine in Adobe PDF, Word RTF, html with css, html 3.2 (no css), ascii text formats. Servlet, JSP examples with sources. [Commercial]
» XXL: eXtendable and fleXible Library - Provides a powerful collection of index-structures, query operators and algorithms facilitating the performance evaluation of new query processing developments. [Open Source, LGPL]
» jX4 - Java-based object oriented platform for MUDs and other modular, possibly distributed applications. [Open Source]
» simpleJ - A collection of easy to use multi-purpose Javabeans providing commonly used methods for handling I/O, arithmetic, and general commonly used algorithms used in computer science. [Open source, BSD License]