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27 stars written in Java
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A Java serialization/deserialization library to convert Java Objects into JSON and back

Java 24,213 4,428 Updated Apr 23, 2026

Java interface to OpenCV, FFmpeg, and more

Java 8,307 1,618 Updated Feb 26, 2026

Bootstrap style widgets for Android, with Glyph Icons

Java 7,241 1,405 Updated Sep 2, 2021

configuration library for JVM languages using HOCON files

Java 6,295 977 Updated Apr 28, 2026

vʌvr (formerly called Javaslang) is a non-commercial, non-profit object-functional library that runs with Java 8+. It aims to reduce the lines of code and increase code quality.

Java 6,132 661 Updated Apr 21, 2026

An extensible multilanguage static code analyzer.

Java 5,391 1,559 Updated Apr 24, 2026

Picocli is a modern framework for building powerful, user-friendly, GraalVM-enabled command line apps with ease. It supports colors, autocompletion, subcommands, and more. In 1 source file so apps …

Java 5,364 458 Updated Oct 30, 2025

Distributed Graph Database

Java 5,234 998 Updated Oct 19, 2022

Java runtime metadata analysis

Java 4,774 705 Updated Jun 17, 2024

Real-time transport layer for Java AI agents. Build once with @Agent — deliver over WebSocket, SSE, gRPC, and WebTransport/HTTP3. Talk MCP, A2A and AG-UI.

Java 3,757 757 Updated Apr 28, 2026

Java dataframe and visualization library

Java 3,748 649 Updated Mar 2, 2026

Java annotation processor to create immutable objects and builders, for records too. Sweep boilerplate code under the rug!

Java 3,559 291 Updated Apr 4, 2026

Repo of the Open Source Android library : RoboSpice. RoboSpice is a modular android library that makes writing asynchronous long running tasks easy. It is specialized in network requests, supports …

Java 2,934 539 Updated Jan 14, 2018

Anthelion is a plugin for Apache Nutch to crawl semantic annotations within HTML pages.

Java 2,840 659 Updated Dec 17, 2015

Android Graph Library for creating zoomable and scrollable line and bar graphs.

Java 2,775 806 Updated Jan 11, 2023

JeroMQ is a pure Java implementation of the ZeroMQ messaging library, offering high-performance asynchronous messaging for distributed or concurrent applications.

Java 2,445 489 Updated Nov 30, 2025

Speedment is a Stream ORM Java Toolkit and Runtime

Java 2,096 232 Updated Nov 7, 2023

MessagePack serializer implementation for Java / msgpack.org[Java]

Java 1,465 325 Updated Mar 16, 2026

Implementation of the sample from REST in Practice based on Spring projects

Java 1,315 420 Updated Apr 24, 2026

Free your Apple Notes data from Notes.app

Java 1,020 26 Updated Sep 24, 2023

Build-time enhancement tool for Java-based Web services projects

Java 490 203 Updated Dec 15, 2025

Mirror one S3 bucket to another S3 bucket, or to/from the local filesystem.

Java 434 87 Updated Oct 3, 2024

SmartGattLib is a Java library that simplifies the work with Bluetooth SMART devices

Java 284 65 Updated Apr 23, 2026

A sensor dashboard for Android plotting all sensor data of your Android wearable.

Java 239 108 Updated Jan 5, 2017

A lightweight Java object mapper for Aerospike

Java 17 3 Updated Apr 13, 2017