Java Open Source Projects Directory

...dedicated into Java open source projects

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General Purpose Libraries

jfig-java-configuration-solution

Java applications are typically deployed in multiple environments and platforms, each requiring some unique configuration. JFig gives developers a simple yet powerful tool to manage their applications configuration. It allows them to:

 * Store application configuration in one common repository of XML files
 * Access configuration data using one common,
 * Easily define multiple configurations, dynamically modifying those variables that need to change in different situations
 * Eliminate the error prone practice of defining the same configuration variables in multiple locations
 * Ease the management, deployment, and control of configuration files

 

nailgun

NailGun: Insanely Fast Java NailGun is a client, protocol, and server for running Java programs from the command line without incurring the JVM startup overhead. Programs run in the server (which is implemented in Java), and are triggered by the client (written in C), which handles all I/O.

 

jgap

JGAP (pronounced "jay-gap") is a genetic algorithms component written in the form of a Java package. It provides basic genetic mechanisms that can be easily used to apply evolutionary principles to problem solutions. The ground is laid for introducing Genetic Programming to JGAP in the near future! JGAP has been written to be very easy to use "out of the box," while also designed to be highly modular so that more adventurous users can easily plug-in custom genetic operators and other sub-components.

 

ostermiller-utils

Libraries for common tasks such as CSV, Base64, Circular Buffers, MD5, and Significant Figures.

 

truezip

Although the ZIP file format it is a proprietary, de-facto standard by PKWARE Inc., ZIP files are ubiquitous on the Internet and thus on many platforms today. The J2SE API provides a well known package java.util.zip with classes like ZipInputStream, ZipOutputStream and ZipFile for easy access to ZIP compatible files. However, this package has some limitations/disadvantages:

 * Sun's implementation uses the character set UTF-8 (eight bit Unicode character set) for entry names and comments instead of CP437 (the genuine IBM-PC character set) as used by the de-facto standard PKZIP from PKWARE. As a result, you cannot read or write ZIP files with international entry file names such as "t?cht.txt" in a ZIP file created by a (southern) German.
 * You need to use an additional API (the package java.util.zip) if your application needs to support ZIP compatible files in addition to ordinary files and directories, thereby significantly inflating your code and adding unnecessary complexity (which adds bugs, bugs, and even more bugs).
 * You can either read or completely write ZIP compatible files, but you cannot just update individual entries.
 * The classes do not support the concept of a directory, which you may want to create, modify, list or delete.
 * You cannot browse a ZIP compatible file with a JFileChooser or FileSystemView. The TrueZIP Library has been developed to overcome these limitations/disadvantages.

 

protomatter

The Protomatter Classes is a collection of (hopefully) useful Open Source Java classes. The package provides the following: Syslog A robust logging system. JDBC Connection Pool A JDBC driver that maintains a pool of connections. PAS A lightweight application server framework. (JavaDoc) Object Pooling Framework A generic object pooling framework. These baseclasses are used to implement the JDBC connection pool, thread queues, mutex locks, etc. Misc Utility Classes Base64 encoder/decoder, blocking queues, work queues, mutex locks, and other stuff...

 

jga-generic-algorithms-for-java

he goal of this project is to provide functionality roughly analogous to the portions of the C++ STL library that are not already provided by java. The primary functionality to be provided is:

 * a set of functors and predicates that may be applied both the the generic collections and to other areas of the standard java library.
 * basic utility algorithms for use with java collections such as those found in STL
 * implementations of standard java classes that are intended to be user-derivable that apply the algorithms and functors for general benefit (for example, implementations of standard swing models that take advantage of predicates and functors) We will not necessarily reproduce STL in all of its details: where Java and C++ provide different interpretations of standard design patterns, we will stay true to standard Java practices in order to be as comfortable for Java programmers to adopt as is practical. We will also not necessarily be limited by the scope or approach of STL

 

octopus

Enhydra Octopus is a Java-based Extraction, Transformation, and Loading (ETL) tool. It may connect to any JDBC data sources and perform transformations defined in an XML file.

 


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