Open Source Java Libraries - Page 47

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 .

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.

Detects the Unicode Transformation Format (UTF) encoding of JSON documents. Useful for Gson, JSON.simple and the org.json API in Android.

A collection of useful but simple Java utility APIs including configuration, plugins, user management and testing.

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

Este projeto implementa lógicas de Controle entre componentes visuais (jxSwing) e a camada de persistência (jxDao). This project implements logical Control of visual components (jxSwing) and persistence layer (jxDao).

Este projeto implementa o Designer Partner DAO. Neste projeto existem classes que facilitam a conexão com os SGDB Derby, Firebird, MySQL, Oracle, PostgreSQL, SQLite e SQLServer. This project implements the DAO Designer Partner. In this project there are classes that facilitate the connection to the DBMS Derby, Firebird, MySQL, Oracle, PostgreSQL, SQLite and SQLServer.

Useful Java Class Library Este projeto reune classes utilitárias que procuram facilitar o desenvolvimento de aplicações Java. This project gathers utility classes that aim to facilitate the development of Java applications.

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.

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.

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)

This project has be renamed to jnum and moved under the crush-software project. No further SVN commits here...

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.

libputio provides a Java API to access the put.io web services

libsu is a modern Android library that provides a safe, convenient API for executing commands with root privileges and interacting with the Android shell. Instead of ad-hoc Runtime.exec calls, it offers structured sessions, proper I/O streams, and lifecycle handling that works reliably across devices. The library focuses on developer ergonomics: thread-safe helpers, Kotlin-friendly APIs, and utilities for file operations, process management, and parcelable data transfer. It’s designed to interoperate smoothly with Magisk-based root environments while degrading gracefully on non-rooted devices when possible. Attention is given to security and correctness—avoiding resource leaks, handling timeouts, and containing elevated operations to explicit scopes. For apps that legitimately need privileged automation or maintenance tasks, libsu becomes the backbone that keeps the “root” parts predictable and testable.

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.

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.

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.

LIXA (LIbre XA) is an open source and free Transaction Manager implementing the distributed transaction processing "XA specification" and "TX (transaction demarcation) specification" according to the X/Open CAE Specification. LIXA implements even XTA: XA Transaction API, an innovative API that implements XA transactional context passing among different applications. LIXA is a Transaction Manager but it's not a Transaction Monitor: this is the distinguishing feature of the project. LIXA technology enables every application container, like a web server or a shell, to become a two phase commit application server. The client/server architecture of LIXA allows many application containers to share a single LIXA (state) server: this is ideal when horizontal scalability is a must and many identical application containers must refer to a single transactional environment. LIXA can be used with the C, C++, Java, Python and COBOL programming languages.

log4testing is a simple logging library for test case execution logging.

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

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.

This project has been moved to https://github.com/loomchild/maligna . All further development will be done there.

mall-swarm is the microservices edition of the mall e-commerce system, designed to illustrate how an enterprise-scale e-commerce backend can be built using Spring Cloud Alibaba, Spring Boot 3.x, Sa-Token (authentication), MyBatis, Elasticsearch, Docker and Kubernetes. It includes modules for gateway, auth, search, portal, admin, monitoring, config, registry, and more, and integrates a Vue-based management frontend. The repository is structured to show how cross-service concerns like service registry, configuration center, monitoring, distributed transactions, API gateway and messaging are done in microservice architecture. It is used as a teaching platform to help engineers migrate from monolith to microservices, grasp the patterns, pitfalls and infrastructure considerations (e.g., Nacos, Seata). The documentation includes diagrams of system architecture, business architecture, service organization, and shows how to set up on Kubernetes.