Quasar

A big, fast and persistent queue based on memory mapped file.

Gradle Build Tool

Union, intersection, and set cardinality in loglog space

JayWire Dependency Injection

cglib - Byte Code Generation Library is high level API to generate and transform Java byte code. It is used by AOP, testing, data access frameworks to generate dynamic proxy objects and intercept field access.

Java bytecode engineering toolkit

*old repository* --> this is now integrated in https://github.com/javaparser/javaparser

Replicate your Key Value Store across your network, with consistency, persistance and performance.

adt4j - Algebraic Data Types for Java

Advanced date, time and interval library for Java with sun/moon-astronomy and calendars like Chinese, Coptic, Ethiopian, French Republican, Hebrew, Hijri, Historic Christian, Indian National, Japanese, Julian, Korean, Minguo, Persian, Thai, Vietnamese

Use the MongoDB query language to query your relational database, typically from frontend.

Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard. By default it supports the Google Java Style Guide and Sun Code Conventions, but is highly configurable. It can be invoked with an ANT task and a command line program.

requery - modern SQL based query & persistence for Java / Kotlin / Android

Binary Artifact Management Tool

JLine is a Java library for handling console input.

JPF is an extensible software analysis framework for Java bytecode. jpf-core is the basis for all JPF projects; you always need to install it. It contains the basic VM and model checking infrastructure, and can be used to check for concurrency defects like deadlocks, and unhandled exceptions like NullPointerExceptions and AssertionErrors.

Manifold is a Java compiler plugin, its features include Metaprogramming, Properties, Extension Methods, Operator Overloading, Templates, a Preprocessor, and more.

A collection of source code generators for Java.

Record builder generator for Java records

Realm is a mobile database: a replacement for SQLite & ORMs

Resilience4j is a fault tolerance library designed for Java8 and functional programming

Governator is a library of extensions and utilities that enhance Google Guice to provide: classpath scanning and automatic binding, lifecycle management, configuration to field mapping, field validation and parallelized object warmup.

An annotation processor for generating type-safe bean mappers

Protocol Buffers - Google's data interchange format

Java library for the Stripe API.

SneakyThrow is a Java library to ignore checked exceptions

paritytrading/parity

Jollyday - A holiday API

Java binding for etcd

A Java library for technical analysis.

CSV library for Java that is fast, RFC-compliant and dependency-free.

Simpler, better and faster Java bean mapping framework

LINQ-style queries for Java 8

Guice (pronounced 'juice') is a lightweight dependency injection framework for Java 11 and above, brought to you by Google.

Build JPA Criteria queries using a Stream-like API

Elegance, high performance and robustness all in one java bean mapper

Reflectionless command line parser

Simple, efficient Excel to POJO library for Java

Catch common Java mistakes as compile-time errors

JHipster is a development platform to quickly generate, develop, & deploy modern web applications & microservice architectures.

A library for creating interactive console applications in Java

A high performance caching library for Java

KickAss Configuration. An annotation-based configuration system for Java and Kotlin

A lightning fast, transactional, file-based FIFO for Android and Java.

Redisson - Easy Redis Java client and Real-Time Data Platform. Valkey compatible. Sync/Async/RxJava/Reactive API. Over 50 Redis based Java objects and services: Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Spring Cache, Tomcat, Scheduler, JCache API, Hibernate, RPC, local cache ...

configuration library for JVM languages using HOCON files

Mixin is a trait/mixin and bytecode weaving framework for Java using ASM

Lightweight dependency injection for Java and Android (JSR-330)

Build software better, together

Elasticsearch Java Rest Client.

:package: Gradle/Maven plugin to package Java applications as native Windows, MacOS, or Linux executables and create installers for them.

QuestDB is an open source time-series database for fast ingest and SQL queries

Autumn Lamonte / jexer · GitLab

Extension module to properly support datatypes of javax.money

The fast, Open Source and easy-to-use solver

Parquet

Debezium

Distributed SQL query engine for big data

The easiest way to write SQL in Java

The Community for Open Collaboration and Innovation | The Eclipse Foundation

The Standard Widget Toolkit | The Eclipse Foundation

Massoni - JmlOk2

LITIENGINE 🎮 Free and Open Source Java 2D Game Engine

IntelliJ IDEA – the Leading Java and Kotlin IDE

Java in Visual Studio Code

Scene Builder - Gluon

jQAssistant

A project to cause (controlled) destruction on your jvm application

Redis Java client

Selma Java bean mapping that compiles

Fault tolerance and resilience patterns for the JVM

JTA Transaction Manager

Get rid of the boilerplate code in properties based configuration.

dOOv (Domain Object Oriented Validation) a fluent API for type-safe bean validation and mapping

Identifies and prioritizes God Classes and Highly Coupled classes in Java codebases you should refactor first.

A streaming JsonPath processor in Java

:fire: Seata is an easy-to-use, high-performance, open source distributed transaction solution.

ImageJ

Internet Calendaring and Scheduling Core Object Specification (iCalendar)

Welcome to the Narayana community!

The AspectJ Project | The Eclipse Foundation

Home

Machine Learning in Java

Elastic — The Search AI Company

Explore, Visualize, Discover Data | Elastic

CodenameOne/vm at master · codenameone/CodenameOne

Stream Processing and Complex Event Processing Engine

Apache Kafka

Quarkus - Supersonic Subatomic Java

P6Spy is a framework that enables database data to be seamlessly intercepted and logged with no code changes to the application.

Java Statistical Analysis Tool, a Java library for Machine Learning

Collect, Parse, Transform Logs | Elastic

Developer-first error tracking and performance monitoring

OACC - Java Application Security Framework

RabbitMQ Java client

Multi-OS Engine

hippo4j/README-EN.md at develop · opengoofy/hippo4j

MyBatis SQL mapper framework for Java

Detect uses of legacy Java APIs

svix-webhooks/java at main · svix/svix-webhooks

Transform ML models into a native code (Java, C, Python, Go, JavaScript, Visual Basic, C#, R, PowerShell, PHP, Dart, Haskell, Ruby, F#, Rust) with zero dependencies

Microsoft Build of OpenJDK

Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.

The open-source Java obfuscation tool working with Ant and Gradle by yWorks - the diagramming experts

Log analyser / visualiser for Java HotSpot JIT compiler. Inspect inlining decisions, hot methods, bytecode, and assembly. View results in the JavaFX user interface.

Red Hat build of OpenJDK | Red Hat Developer

An in-memory file system for Java 7+

Java client for Consul HTTP API

jOOX - The Power of jQuery Applied to W3C DOM Like JDBC, DOM is a powerful, yet very verbose low-level API to manipulate XML. The HTML DOM an be manipulated with the popular jQuery product, in JavaScript. Why don't we have jQuery in Java? jOOX is jQuery's XML parts, applied to Java.

FizzBuzz Enterprise Edition is a no-nonsense implementation of FizzBuzz made by serious businessmen for serious business purposes.

An application observability facade for the most popular observability tools. Think SLF4J, but for observability.

Extract tables from PDF files

OpenPDF is a free Java library for creating and editing PDF files, with a LGPL and MPL open source license. OpenPDF is based on a fork of iText. We welcome contributions from other developers. Please feel free to submit pull-requests and bugreports to this GitHub repository.

JavaMelody : monitoring of JavaEE applications

Java Abstracted Foreign Function Layer

A lightweight, simple FTP server. Pure Java, no dependencies.

TCP/UDP client/server library for Java, based on Kryo

XML/XHTML and CSS 2.1 renderer in pure Java

Efficient reliable UDP unicast, UDP multicast, and IPC message transport

Prometheus instrumentation library for JVM applications

JObfuscator — Java Source Code Obfuscation & Protection

:chart_with_upwards_trend: Capturing JVM- and application-level metrics. So you know what's going on.

Statistical Machine Intelligence & Learning Engine

PipelinR is a lightweight command processing pipeline ❍ ⇢ ❍ ⇢ ❍ for your Java awesome app.

Home - Micronaut Framework

Java reporting library for creating dynamic report designs at runtime

Java Structured Logging API for Logback, Log4J2, and JUL

Support alternative markup for Apache Maven POM files

Pure Java ZeroMQ

OctoLinker — Links together, what belongs together

DataMelt

AWS Service registry for resilient mid-tier load balancing and failover.

A fast, light and cloud native OAuth 2.0 authorization microservices based on light-4j

ISBN core

Provides tracing abstractions over tracers and tracing system reporters.

Java library for representing, parsing and encoding URNs as in RFC2141 and RFC8141 (Maintained by @claussni)

The Java gRPC implementation. HTTP/2 based RPC

The java implementation of Apache Dubbo. An RPC and microservice framework.

commons networking utils

IP2Location.io Java SDK allows user to query for an enriched data set based on IP address and provides WHOIS lookup api that helps users to obtain domain information.

OpenAI Api Client in Java

Best-of-breed OpenTracing utilities, instrumentations and extensions

OpenTelemetry Java SDK

Elide

The official AWS SDK for Java - Version 2

🛑 This library is DEPRECATED!

an open source solution to application performance monitoring for java server applications

A Sentry SDK for Java, Android and other JVM languages.

A powerful flow control component enabling reliability, resilience and monitoring for microservices. (面向云原生微服务的高可用流控防护组件)

Your relational data. Objectively. - Hibernate ORM

A networking framework that evolves with your application

Ultra-fast SQL-like queries on Java collections

Home | MobileUI

Cryptomator - Free Cloud Encryption for Dropbox & Co

GraphStream - A Dynamic Graph Library

Cloud Application Platform | Heroku

ActiveJ RPC | Lightning-fast binary protocol for high-load architecture | ActiveJ 6.0

Build software better, together

Topaz | Topaz

GraalVM compiles Java applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀

Password strength estimator

Red Hat OpenShift enterprise application platform

jmix.io

Eclipse Deeplearning4j

Cross-Platform App Development with Java/Kotlin

Alibaba Dragonwell8 JDK

Integrate with the latest language models, image generation, speech, and deep learning frameworks like ChatGPT, DALL·E, and Cohere using few java lines.

Apache Pulsar | Apache Pulsar

Eclipse OpenJ9: A Java Virtual Machine for OpenJDK that's optimized for small footprint, fast start-up, and high throughput. Builds on Eclipse OMR (https://github.com/eclipse/omr) and combines with the Extensions for OpenJDK for OpenJ9 repo.

Tink is a multi-language, cross-platform, open source library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.

APM, (Application Performance Management) tool for large-scale distributed systems.

Java wrapper for the popular chat & VOIP service: Discord https://discord.com

Home - ISA-Ali

API gateway for REST, OpenAPI, GraphQL and SOAP written in Java.

AutoMQ is a cloud-first alternative to Kafka by decoupling durability to S3 and EBS. 10x cost-effective. Autoscale in seconds. Single-digit ms latency.

A scientific charting library focused on performance optimised real-time data visualisation at 25 Hz update rates for data sets with a few 10 thousand up to 5 million data points.

A blazingly fast multi-language serialization framework powered by JIT and zero-copy.

Home

Apache HertzBeat(incubating) is a real-time monitoring system with agentless, performance cluster, prometheus-compatible, custom monitoring and status page building capabilities.

Cloud Computing Services | Google Cloud

Test Automation Made Simple

MockServer

Javalin - A lightweight Java and Kotlin web framework. Create REST APIs in Java or Kotlin easily.

ActiveJ | Alternative Java platform for web, high load, and cloud programming | ActiveJ 6.0

JGit | The Eclipse Foundation

Awesome Java | LibHunt

PrimeFaces

Head First Java, 3rd Edition

WireMock - flexible, open source API mocking

Java, SQL and jOOQ.

Roadmap to becoming a Java developer in 2024

The SDKMAN! Command Line Interface

Java regular expressions made easy.

Load testing designed for DevOps and CI/CD | Gatling

(cross-platform) Java Version Manager

Easy Setup Stub Server

Object-Oriented Java primitives, as an alternative to Google Guava and Apache Commons

foojay – a place for friends of OpenJDK

Build Modern Web Apps using Java Full-Stack platform

Newest 'java' Questions

The Well-Grounded Java Developer, Second Edition

A curated list of resources related to the Java annotation processing API (JSR 269)

MinIO Client SDK for Java

Snapshot testing for Java, Kotlin, and the JVM

Google core libraries for Java

PowerMock is a Java framework that allows you to unit test code normally regarded as untestable.

🎯 ConsoleCaptor captures console output for unit and integration testing purposes

A TestNG like dataprovider runner for JUnit with many additional features

A curated list of awesome Gradle plugins and resources for a better development workflow automation.

A curated list of delightful Selenium resources.

Dex : The Data Explorer -- A data visualization tool written in Java/Groovy/JavaFX capable of powerful ETL and publishing web visualizations.

Java lib for monitoring directories or individual files via java.nio.file.WatchService

A collaborative list of great resources about RESTful API architecture, development, test, and performance

EasyMock, makes mocking easier since 2001

Test if a request/response matches a given raml definition

dregex is a Java library that implements a regular expression engine using deterministic finite automata (DFA). It supports some Perl-style features and yet retains linear matching time, and also offers set operations.

Java scope functions inspired by Kotlin

A scalable web crawler framework for Java.

Manage your Java environment

:rocket: Lightning fast and elegant mvc framework for Java8

A curated list of awesome JavaFX libraries, books, frameworks, etc...

java port of Underscore.js

A curated list of Microservice Architecture related principles and technologies.

Baeldung

A curated list of awesome loosely performance related JVM stuff. Inspired by awesome-python.

Gephi - The Open Graph Viz Platform

🎯 LogCaptor captures log entries for unit and integration testing purposes

Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas

A curated list of awesome resources for Graal, GraalVM, Truffle and related topics

A library that generates postman collection and integration tests from java code

Programming & DevOps news, tutorials & tools

Free Java & OpenJDK Info for Daily Java Usage | foojay

Semantic versioning for Java apps.

Developer Community

Most popular Mocking framework for unit tests written in Java

assertions for logging with logback

Lightweight analysis tool for detecting mutability in Java classes

A Java architecture test library, to specify and assert architecture rules in plain Java

A compact and highly efficient workflow and Business Process Management (BPM) platform for developers, system admins and business users.

Testcontainers is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.

Embulk: Pluggable Bulk Data Loader.

Open Source Web Crawler for Java

True Object-Oriented Java Web Framework without NULLs, Static Methods, Annotations, and Mutable Objects

XMLUnit for Java 2.x

Compare JSON in your Unit Tests

Improve Service Reliability with AI

A curated list of delightful SAP Commerce resources.

Java rate limiting library based on token-bucket algorithm.

JVM version of Pact. Enables consumer driven contract testing, providing a mock service and DSL for the consumer project, and interaction playback and verification for the service provider project.

Checklist for code reviews

continuous integration and continuous delivery

A list of useful Java frameworks, libraries, software and hello worlds examples