Open Source Java Libraries - Page 47
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Java Libraries
View 75 business solutionsBrowse free open source Java Libraries and projects below. Use the toggles on the left to filter open source Java Libraries by OS, license, language, programming language, and project status.
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jsams
Java Simplified Accounting Management System
JSAMS is a system that manages all the accounting documents. All the flow of a simplified accounting management system, an estimate can be transferred to a command or a bill, a command can be transferred to a delivery order or a bill, a delivery order can be transferred to a bill, a bill can be transferred to a credit note, a credit note is the final document of the accounting management. That can be also possible to transfer partially a command or a delivery note to a bill!!! -
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jsf-showcase
JavaServer Faces (JSF) v.2.2.x showcase, portable web-application.
JavaServer Faces (JSF) v.2.2.x web-framework showcase. Portable web-application for Java WEB-developers, who use Java Server Faces. Made for convenience - if Internet access suddenly down ). See please excellent projects: https://github.com/liferay/liferay-faces-showcase/ and https://github.com/heroku/webapp-runner/ , also https://mvnrepository.com/search?q=webapp-runner and https://mvnrepository.com/search?q=com.liferay.faces.demo . -
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json4java
Very Compact Java Reader / Writer ( 12kb)
I was i need of a json writer / parser which is - Compact. Libraries around there are way too big given the json spec and my usual need for a project. -Simply integrated as a simple jar. Dont want to force Maven dependency on projects. Could not find it so i wrote it. I dont claim its perfect , but should save some time for small / medium projecs. Json types are intuitively mapped to their Java counterparts : Map , List. I did not try all UTF16 encodings , but let me know i will fix it IF YOU GIVE ME A TEST CASE. ( input this , expect that ) Also floating point parsing for exponential notation can be slighly improved , does not bother on my projects. Android dev will like it to be as small as it can be i guess. Documentation in readme.txt -
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jsoncat
Lightweight HTTP framework built in Java
jsoncat is a lightweight HTTP framework built in Java (using Netty) that aims to replicate some of the feel of Spring Boot—but in a minimal, educational style focused on clarity rather than full enterprise complexity. The project is organized as a small library and tutorial-style codebase, where core HTTP handling, routing, and JSON processing are exposed in a compact way so learners can trace how HTTP requests are parsed and dispatched. Because it avoids heavy abstractions and auto-magical configuration, it’s suited to developers who want to understand what happens beneath frameworks rather than just use them. The code has detailed comments (recently translated or annotated for Chinese readers), making it a practical study project for learning network programming, middleware design, and handler chains. Projects like this are especially useful for backend engineers or Java learners who want to demystify how web servers and routing frameworks work at a low level. -
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jsonunicode
Java character encoding API for JSON
Detects the Unicode Transformation Format (UTF) encoding of JSON documents. Useful for Gson, JSON.simple and the org.json API in Android. -
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A collection of useful but simple Java utility APIs including configuration, plugins, user management and testing.
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Wrapper for the library Libdc1394 to enable communication with the Java programming language. Java Video Capture for ieee 1394 cameras. Support for jfm JMF-2.1.1e, register a new protocol dc1394. ieee1394 camera for jmf, with this library jvc1394
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kanjidic-parser
Kanjidic Parser is a Parser for Parsing the KANJIDIC File
kanjidic-parser is an API to parse the KANJIDIC2 data file. This file is compiled by Jim Breen and the 'Electronic Dictionary Research and Development Group' at Monash University. -
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Java API for GSM modems. Allows sending and receiving SMS. Capable to dial out and receive calls in data mode. Contains driver classes for Wavecom and Siemens GSM modems. Extandable. Developers are welcome to supply new drivers.
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knowceans
Utility classes from maps to search engine to random samplers
Collection of several multi-purpose Java libraries. --- knowceans-tools = collection of Java utility classes. --- Highlights: --- org.knowceans.util: IndexQuickSort, TableList: apply order of one array/list to others +++ Vectors, ArrayUtils: array convenience +++ RandomSamplers, CokusRandom, ArmSampler, Densities: random sampling and distributions +++ Arguments: command line parser +++ StopWatch, Which, ExternalProcess: runtime stuff +++ ParallelFor: OpenMP workalike +++ PatternString, NamedGroupRegex: regex convenience --- org.knowceans.corpus: CorpusSearcher: full-text search engine +++ LabelNumCorpus: svmlight corpus storage and filtering +++ NIPS corpus with text, authors, labels and citations --- org.knowceans.map: InvertibleHashMultiMap, BijectiveHashMap: implement n:m and 1:1 relations. --- Other libs: knowceans-arms = port of the Adaptive Rejection Metropolis Sampler (ARMS) for arbitrary distributions +++ lda-j = port of lda-c, implementing Latent Dirichlet Allocation (LDA) -
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kovacs.util (Java numerical classes)
!!! moved to jnum subproject under crush-software !!!
This project has be renamed to jnum and moved under the crush-software project. No further SVN commits here... -
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libVMR
VMR - machine learning library
libVMR is a class library written in Java which implements code generator for group method of data handling - GMDH. The library is intended for users, with machine learning skills. libVMR provides an effective framework for the research and development of data mining and predictive analytics. libVMR is based on the most popular neural network model with a higher generalization ability from kernel tricks - vector machine by Reshetov (VMR). The library has been designed to learn from data sets. Typical applications here are pattern recognition ( binary classification). -
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Java implementation of GNTP, the Growl Network Transport Protocol. This library allows your Java application to send notifications to Growl. This project is deprecated. Use the successor project at https://github.com/feilimb/libgrowl instead.
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This is extension of libusb4j library (from Kenai). While old project works fine with Linux implementation, it has serious problem on Windows. This library fixes that problem and can be used on Windows or any other OS having libusb library.
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libwlocate is a shared library that can be used for location-based services. It checks for WLAN-networks that are available near to a user and retrieves the current geographic position out of them. Thus no GPS is needed for positioning. This WLAN-based geolocation happens without using any of the commercial services that do the same but track the users position and data. libwlocate instead bases on the free OpenWLANMap project.
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license4j
License4J Library and GUI Tools
LICENSE4J is a robust licensing library and license server that simplifies software licensing for developers. It allows for easy integration of licensing functionality into Java applications with minimal code. The user-friendly web-based License Manager works seamlessly on both desktop and mobile devices, enhancing accessibility for all users. The Licensing Library is a versatile tool that developers can easily integrate into any Java application. It empowers developers to implement license management functionalities, validating their authenticity, and enforcing specific licensing conditions. This library provides a range of features, including support for node-locked, floating, subscription, perpetual, trial licenses, and time-limited licenses, allowing developers to choose the best licensing model for their software offerings. -
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lwdba is a light weight database access library. A programmer can access database by SQL in a high level fashion. No complicated configuration is required. lwdba is simple, easy to learn, and easy to use. Connection pooling and SQL generator is supported
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lwjgl-basics
LibGDX/LWJGL tutorials and examples
lwjgl-basics is a lightweight, shader-driven Java library designed to teach and simplify 2D game development using LWJGL and OpenGL, focusing on minimal abstractions and direct control over rendering pipelines. It provides essential utilities for handling textures, shaders, and sprite rendering while maintaining a low-level approach that exposes developers to the underlying graphics concepts. The repository doubles as both a functional library and an educational resource, offering example code and tutorials that demonstrate how modern graphics programming works in practice. Its design philosophy prioritizes simplicity and clarity over feature completeness, making it ideal for learning or prototyping rather than large-scale production systems. The inclusion of test cases and sample scenes allows developers to quickly experiment with rendering techniques and understand how components interact. -
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This project has been moved to https://github.com/loomchild/maligna . All further development will be done there.
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material-about-library
Makes it easy to create beautiful about screens for your apps
Makes it easy to create a beautiful about screen for your app. Generates an Activity or Fragment. If you use this library in your app, please let me know and I'll add it to the list. -
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maxJDataTable
JDataTable Version basica de un JDatatable para su uso en java.
Version basica de un JDatatable para su uso en java. añadido metodo que retorna la tabla en codigo HTML. -
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mdx builder 4 java
MDX query builder library
Lightweight Java library for building MDX queries. -
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melq is a library of classes very useful to speed the development of graphical user interfaces (GUI) in Java. It also contains several classes to work with databases (PostgreSQL). All classes are meant to work together bu they do not depend of each other
