zxing / zxing
ZXing ("Zebra Crossing") barcode scanning library for Java, Android
zxing / zxing
langchain4j / langchain4j
LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing tool calling (including MCP support), agents and RAG easy. It integrates seamlessly with enterprise Java frameworks like Quarkus and Spring Boot.
iluwatar / java-design-patterns
Design patterns implemented in Java
grimmory-tools / grimmory
A self-hosted library for your ebooks, comics, and audiobooks
MewX / light-novel-library_Wenku8_Android
[CASUALLY MAINTAINED] 轻小说文库 (Wenku8.com) 安卓版第三方公益App，始于2014年的初版Material Design风格、非盈利、Play Store上安装包最小的轻小说阅读器 (light novel reader)。目前网站的API由于被大量滥用，已更新成我自己架的 Cloudflare Worker API 中继节点，不然的话网站关闭API就全军覆没了。
ReactiveX / RxJava
RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.
ben-manes / caffeine
A high performance caching library for Java
resilience4j / resilience4j
Resilience4j is a fault tolerance library designed for Java8 and functional programming
flyway / flyway
Flyway by Redgate • Database Migrations Made Easy.
raphw / byte-buddy
Runtime code generation for the Java virtual machine.
vavr-io / vavr
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.
zhkl0228 / unidbg
Allows you to emulate an Android native library, and an experimental iOS emulation
LibrePDF / OpenPDF
OpenPDF is an open-source Java library for creating, editing, rendering, and encrypting PDF documents, as well as generating PDFs from HTML. It is licensed under the LGPL and MPL.
bucket4j / bucket4j
Java rate limiting library based on token-bucket algorithm.
ta4j / ta4j
A Java library for technical analysis.
itext / itext-java
iText for Java represents the next level of SDKs for developers that want to take advantage of the benefits PDF can bring. Equipped with a better document engine, high and low-level programming capabilities and the ability to create, edit and enhance PDF documents, iText can be a boon to nearly every workflow.
JonathanLink / PDFLayoutTextStripper
Converts a pdf file into a text file while keeping the layout of the original pdf. Useful to extract the content from a table in a pdf file for instance. This is a subclass of PDFTextStripper class (from the Apache PDFBox library).
mkpaz / atlantafx
Modern JavaFX CSS theme collection with additional controls.
booklore-app / booklore
BookLore: A self-hosted, multi-user digital library with smart shelves, auto metadata, Kobo & KOReader sync, BookDrop imports, OPDS support, and a built-in reader for EPUB, PDF, and comics.
mwiede / jsch
fork of the popular jsch library
OpenGamma / Strata
Open source analytics and market risk library from OpenGamma
valkey-io / valkey-glide
An open source Valkey client library that supports Valkey, and Redis open source 6.2, 7.0 and 7.2. Valkey GLIDE is designed for reliability, optimized performance, and high-availability, for Valkey and Redis OSS based applications. GLIDE is a multi language client library, written in Rust with programming language bindings, such as Java and Python
TimefoldAI / timefold-quickstarts
Get started with Timefold quickstarts here. Optimize the vehicle routing problem, employee rostering, task assignment, maintenance scheduling and other planning problems.
bumptech / glide
An image loading and caching library for Android focused on smooth scrolling
google / gson
A Java serialization/deserialization library to convert Java Objects into JSON and back
Tencent / tinker
Tinker is a hot-fix solution library for Android, it supports dex, library and resources update without reinstall apk.
mockito / mockito
Most popular Mocking framework for unit tests written in Java
deeplearning4j / deeplearning4j
Suite of tools for deploying and training deep learning models using the JVM. Highlights include model import for keras, tensorflow, and onnx/pytorch, a modular and tiny c++ library for running math code and a java based math library on top of the core c++ library. Also includes samediff: a pytorch/tensorflow like library for running deep learn...
react-native-image-picker / react-native-image-picker
:sunrise_over_mountains: A React Native module that allows you to use native UI to select media from the device library or directly from the camera.
dropwizard / dropwizard
A damn simple library for building production-ready RESTful web services.
dropwizard / metrics
:chart_with_upwards_trend: Capturing JVM- and application-level metrics. So you know what's going on.
graphhopper / graphhopper
Open source routing engine for OpenStreetMap. Use it as Java library or standalone web server.
lightbend / config
configuration library for JVM languages using HOCON files
mik3y / usb-serial-for-android
Android USB host serial driver library for CDC, FTDI, Arduino and other devices.
liquibase / liquibase
Main Liquibase Source
TommyLemon / Android-ZBLibrary
🔥 Android MVP 快速开发框架，做国内 「示例最全面」「注释最详细」「使用最简单」「代码最严谨」的 Android 开源 UI 框架。 🔥 An Android MVP Framework with many demos, detailed documents, simple usages and strict codes.
rubenlagus / TelegramBots
Java library to create bots using Telegram Bots API
LFDT-web3j / web3j
Lightweight Java and Android library for integration with Ethereum clients
bitcoinj / bitcoinj
A library for working with Bitcoin
line / armeria
Your go-to microservice framework for any situation, from the creator of Netty et al. You can build any type of microservice leveraging your favorite technologies, including gRPC, Thrift, Kotlin, Retrofit, Reactive Streams, Spring Boot and Dropwizard.
deepjavalibrary / djl
An Engine-Agnostic Deep Learning Framework in Java
jacoco / jacoco
:microscope: Java Code Coverage Library
apache / shiro
Apache Shiro is a powerful and easy-to-use Java security framework that performs authentication, authorization, cryptography, and session management
alibaba / fastjson2
🚄 FASTJSON2 is a Java JSON library with excellent performance.
knowm / XChange
XChange is a Java library providing a streamlined API for interacting with 60+ Bitcoin and Altcoin exchanges providing a consistent interface for trading and accessing market data.
kubernetes-client / java
Official Java client library for kubernetes
TNG / ArchUnit
A Java architecture test library, to specify and assert architecture rules in plain Java
apache / logging-log4j2
Apache Log4j is a versatile, feature-rich, efficient logging API and backend for Java.
docker-java / docker-java
Java Docker API Client
apache / pdfbox
Mirror of Apache PDFBox
google / truth
Fluent assertions for Java and Android
Kong / unirest-java
Unirest in Java: Simplified, lightweight HTTP client library.
commonmark / commonmark-java
Java library for parsing and rendering CommonMark (Markdown)
vladmihalcea / hypersistence-utils
The Hypersistence Utils library (previously known as Hibernate Types) gives you Spring and Hibernate utilities that can help you get the most out of your data access layer.
mongodb / mongo-java-driver
The official MongoDB drivers for Java, Kotlin, and Scala
apache / casbin-jcasbin
An authorization library that supports access control models like ACL, RBAC, ABAC in Java
dlew / joda-time-android
Joda-Time library with Android specialization
apache / logging-flume
Apache Flume is a distributed, reliable, and available service for efficiently collecting, aggregating, and moving large amounts of log-like data
firebase / firebase-android-sdk
Firebase Android SDK
zeromq / jeromq
JeroMQ is a pure Java implementation of the ZeroMQ messaging library, offering high-performance asynchronous messaging for distributed or concurrent applications.