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88 stars written in Java
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Design patterns implemented in Java

Java 93,866 27,368 Updated Mar 20, 2026

Spring Boot helps you to create Spring-powered, production-grade applications and services with absolute minimum fuss.

Java 80,403 41,886 Updated Apr 13, 2026

Google core libraries for Java

Java 51,507 11,148 Updated Apr 10, 2026

RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.

Java 48,336 7,597 Updated Apr 13, 2026

A libre lightweight streaming front-end for Android.

Java 37,791 3,534 Updated Apr 12, 2026

Netty project - an event-driven asynchronous network application framework

Java 34,909 16,258 Updated Apr 11, 2026

The automation tower defense RTS

Java 27,193 3,393 Updated Apr 13, 2026

a fast, scalable, multi-language and extensible build system

Java 25,306 4,441 Updated Apr 13, 2026

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

Java 21,546 1,788 Updated Apr 13, 2026

光 HikariCP・A solid, high-performance, JDBC connection pool at last.

Java 21,092 3,012 Updated Nov 4, 2025

A high performance caching library for Java

Java 17,590 1,681 Updated Apr 13, 2026

Modern Java - A Guide to Java 8

Java 16,758 4,008 Updated Aug 11, 2023

A scalable web crawler framework for Java.

Java 11,687 4,147 Updated Dec 20, 2025

A Java API for generating .java source files.

Java 10,858 1,388 Updated Oct 10, 2024

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

Java 10,626 1,452 Updated Apr 11, 2026

Test Automation Made Simple

Java 8,836 2,025 Updated Apr 13, 2026

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

Java 7,849 1,793 Updated Apr 11, 2026

Catch common Java mistakes as compile-time errors

Java 7,155 787 Updated Apr 10, 2026

Java DSL for easy testing of REST services

Java 7,124 1,932 Updated Feb 4, 2026

JavaFX Material Design Library

Java 6,339 1,047 Updated Jun 28, 2023

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 6,127 659 Updated Apr 1, 2026

Angry IP Scanner - fast and friendly network scanner

Java 4,925 808 Updated Dec 1, 2025

Fork of tagtraum industries' GCViewer. Tagtraum stopped development in 2008, I aim to improve support for Sun's / Oracle's java 1.6+ garbage collector logs (including G1 collector)

Java 4,636 993 Updated Dec 6, 2025

Open Source Web Crawler for Java

Java 4,625 1,908 Updated Nov 4, 2021

H2 is an embeddable RDBMS written in Java.

Java 4,590 1,282 Updated Apr 2, 2026

PDFsam, a desktop application to split, merge, mix, rotate PDF files and extract pages

Java 4,352 393 Updated Apr 13, 2026

Fault tolerance and resilience patterns for the JVM

Java 4,308 309 Updated Dec 28, 2025

SpotBugs is FindBugs' successor. A tool for static analysis to look for bugs in Java code.

Java 3,859 652 Updated Apr 13, 2026

Track and evaluate the performance of your investment portfolio across stocks, cryptocurrencies, and other assets.

Java 3,769 762 Updated Apr 12, 2026

The Enterprise-ready testing and specification framework.

Java 3,629 479 Updated Apr 9, 2026
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