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Browse the top Java repositories ranked by star count. Compare similar projects to find the best fit for your stack.

Repositories

49Updated Oct 27, 2026

Combined Stars

2.3M

Top-3 Concentration

14%

Recently Active

40Led by alibaba

Top Repositories

Top 3

1st#1

krahets/hello-algo

《Hello 算法》：动画图解、一键运行的数据结构与算法教程。支持简中、繁中、English、日本語，提供 Python, Java, C++, C, C#, JS, Go, Swift, Rust, Ruby, Kotlin, TS, Dart 等代码实现

131.4KStars

15.5KForks

2 weeks agoUpdated

JavaNOASSERTIONsince 2022

2nd#2

iluwatar/java-design-patterns

Design patterns implemented in Java

94.8KStars

27.3KForks

2 weeks agoUpdated

JavaNOASSERTIONsince 2014

3rd#3

macrozheng/mall

mall项目是一套电商系统，包括前台商城系统及后台管理系统，基于Spring Boot+MyBatis实现，采用Docker容器化部署。前台商城系统包含首页门户、商品推荐、商品搜索、商品展示、购物车、订单流程、会员中心、客户服务、帮助中心等模块。后台管理系统包含商品管理、订单管理、会员管理、促销管理、运营管理、内容管理、统计报表、财务管理、权限管理、设置等模块。

85KStars

29.8KForks

1 months agoUpdated

JavaApache-2.0since 2018

Full ranking

Repository

Language

Stars

Forks

Updated

spring-projects/spring-boot

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

est. 2012

Java

81.8K

44.1K

Yesterday

doocs/advanced-java

😮 Core Interview Questions & Answers For Experienced Java(Backend) Developers | 互联网 Java 工程师进阶知识完全扫盲：涵盖高并发、分布式、高可用、微服务、海量数据处理等领域知识

est. 2018

Java

79.2K

19.1K

1 weeks ago

elastic/elasticsearch

Free and Open Source, Distributed, RESTful Search Engine

est. 2010

Java

78.4K

26.1K

Today

MisterBooo/LeetCodeAnimation

Demonstrate all the questions on LeetCode in the form of animation.（用动画的形式呈现解LeetCode题目的思路,完整单步/回看/变速/语音讲解在 algomooc.com）

est. 2018

Java

76.7K

13.8K

4 months ago

TheAlgorithms/Java

All Algorithms implemented in Java

est. 2016

Java

66.6K

21.3K

2 days ago

kdn251/interviews

Everything you need to know to get the job.

est. 2017

Java

65.5K

12.9K

1 years ago

termux/termux-app

Termux - a terminal emulator application for Android OS extendible by variety of packages.

est. 2015

Java

63.5K

1 months ago

spring-projects/spring-framework

Spring Framework

est. 2010

Java

60.3K

38.7K

Yesterday

dbeaver/dbeaver

Free universal database tool and SQL client

est. 2015

Java

52.2K

4.4K

Yesterday

google/guava

Google core libraries for Java

est. 2014

Java

51.9K

11.2K

Yesterday

skylot/jadx

Dex to Java decompiler

est. 2013

Java

51.3K

5.8K

Yesterday

jeecgboot/JeecgBoot

【低代码v2.0，一句话即可生成整个系统】企业级AI低代码平台，一键生成前后端代码甚至整个系统。 AI Skills 一句话画流程、设计表单、生成报表、大屏。内置 AI应用平台涵盖：AI聊天、知识库、流程编排、MCP插件等，兼容主流大模型。引领AI低代码「Skills 生成 → 在线配置 → 代码生成 → 手工合并->AI修改」开发模式，解决 Java 项目 90% 重复工作，提高效率又不失灵活。

est. 2018

Java

48.3K

16.2K

3 days ago

ReactiveX/RxJava

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

est. 2013

Java

48.2K

7.6K

Yesterday

lysine-dev/retrofit

A type-safe HTTP client for Android and the JVM

est. 2010

Java

43.9K

7.3K

Yesterday

ashishps1/awesome-system-design-resources

Learn System Design concepts and prepare for interviews using free resources.

est. 2023

Java

42.9K

8.9K

8 months ago

apache/dubbo

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

est. 2012

Java

41.6K

26.3K

Yesterday

TeamNewPipe/NewPipe

A libre lightweight streaming front-end for Android.

est. 2015

Java

40.3K

3.9K

Yesterday

YunaiV/ruoyi-vue-pro

🔥 官方推荐 🔥 RuoYi-Vue 全新 Pro 版本，优化重构所有功能。基于 Spring Boot + MyBatis Plus + Vue & Element 实现的后台管理系统 + 微信小程序，支持 RBAC 动态权限、数据权限、SaaS 多租户、Flowable 工作流、三方登录、支付、短信、商城、CRM、ERP、MES、IM、AI 大模型、IoT 物联网等功能。你的 ⭐️ Star ⭐️，是作者生发的动力！

est. 2021

Java

40.1K

8.6K

2 days ago

halo-dev/halo

Halo 是一款强大易用的开源建站工具，从个人博客、知识库，到企业官网、在线商城，Halo 都能助您轻松实现，一站式满足您的多样化建站需求。

est. 2018

Java

40K

10.3K

Yesterday

alibaba/arthas

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

est. 2018

Java

37.6K

7.6K

4 days ago

keycloak/keycloak

Open Source Identity and Access Management For Modern Applications and Services

est. 2013

Java

37.5K

9.1K

Today

eugenp/tutorials

Getting Started with Spring Boot 3:

est. 2013

Java

37.3K

53.1K

Yesterday

doocs/leetcode

🔥LeetCode solutions in any programming language | 多种编程语言实现 LeetCode、《剑指 Offer（第 2 版）》、《程序员面试金典（第 6 版）》题解

est. 2018

Java

36.7K

9.5K

Yesterday

geekxh/hello-algorithm

🌍 针对小白的算法训练 | 包括四部分：①.大厂面经 ②.力扣图解 ③.千本开源电子书 ④.百张技术思维导图（项目花了上百小时，希望可以点 star 支持，🌹感谢~）推荐免费ChatGPT使用网站

est. 2020

Java

36.1K

6.4K

3 years ago

airbnb/lottie-android

Render After Effects animations natively on Android and iOS, Web, and React Native

est. 2016

Java

35.8K

5.4K

8 months ago

yuliskov/SmartTube

Browse media content with your own rules on Android TV

est. 2020

Java

35.6K

2.2K

Yesterday

netty/netty

Netty project - an event-driven asynchronous network application framework

est. 2010

Java

35.1K

16.3K

Yesterday

bumptech/glide

An image loading and caching library for Android focused on smooth scrolling

est. 2013

Java

35K

6.2K

Yesterday

SeleniumHQ/selenium

A browser automation framework and ecosystem.

est. 2013

Java

34.6K

8.7K

Today

zxing/zxing

ZXing ("Zebra Crossing") barcode scanning library for Java, Android

est. 2011

Java

34.2K

9.4K

Yesterday

apache/kafka

Apache Kafka - A distributed event streaming platform

est. 2011

Java

34.1K

15.6K

Yesterday

xkcoding/spring-boot-demo

🚀一个用来深入学习并实战 Spring Boot 的项目。

est. 2017

Java

34.1K

10.8K

2 years ago

Blankj/AndroidUtilCode

:fire: Android developers should collect the following utils(updating).

est. 2016

Java

33.6K

10.6K

2 years ago

alibaba/easyexcelArchived

快速、简洁、解决大文件内存溢出的java处理Excel工具

est. 2018

Java

33.6K

7.5K

1 years ago

alibaba/nacos

an easy-to-use dynamic service discovery, configuration and service management platform for building AI cloud native applications.

est. 2018

Java

33.5K

13.3K

Today

binarywang/WxJava

微信开发 Java SDK ，支持包括微信支付，开放平台，小程序，企业微信，视频号，公众号等的后端开发

est. 2016

Java

33.2K

3 days ago

conductor-oss/conductor

Conductor is an event driven agentic workflow engine providing durable and highly resilient execution engine for applications and AI Agents

est. 2023

Java

32.4K

Yesterday

xuxueli/xxl-job

A distributed task scheduling framework.（分布式任务调度平台XXL-JOB）

est. 2015

Java

30.6K

11.5K

2 weeks ago

ityouknow/spring-boot-examples

about learning Spring Boot via examples. Spring Boot 教程、技术栈示例代码，快速简单上手教程。

est. 2016

Java

30.4K

12.1K

2 years ago

chinabugotech/hutool

🍬A set of tools that keep Java sweet.

est. 2014

Java

30.2K

7.6K

6 days ago

DrKLO/Telegram

Telegram for Android source

est. 2013

Java

30.2K

10.4K

2 days ago

opendataloader-project/opendataloader-pdf

PDF Parser for AI-ready data. Automate PDF accessibility. Open-source.

est. 2025

Java

30.1K

2.9K

Today

kestra-io/kestra

Orchestrate everything, everywhere. The open-source control plane for workflows across data, infrastructure, business processes and AI agents. Declarative YAML, event-driven, any language, Git-versioned, scalable to millions of executions.

est. 2019

Java

30K

3.5K

Yesterday

apolloconfig/apollo

Apollo is a reliable configuration management system suitable for microservice configuration management scenarios.

est. 2016

Java

29.8K

10.1K

3 days ago

alibaba/canal

阿里巴巴 MySQL binlog 增量订阅&消费组件

est. 2013

Java

29.7K

7.6K

2 months ago

Anuken/Mindustry

The automation tower defense RTS

est. 2017

Java

29.5K

3.8K

5 days ago

spring-projects/spring-boot

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

Java

★81.8K

🍴44.1K

est. 2012

doocs/advanced-java

Java

★79.2K

🍴19.1K

est. 2018

elastic/elasticsearch

Free and Open Source, Distributed, RESTful Search Engine

Java

★78.4K

🍴26.1K

est. 2010

MisterBooo/LeetCodeAnimation

Demonstrate all the questions on LeetCode in the form of animation.（用动画的形式呈现解LeetCode题目的思路,完整单步/回看/变速/语音讲解在 algomooc.com）

Java

★76.7K

🍴13.8K

est. 2018

TheAlgorithms/Java

All Algorithms implemented in Java

Java

★66.6K

🍴21.3K

est. 2016

kdn251/interviews

Everything you need to know to get the job.

Java

★65.5K

🍴12.9K

est. 2017

termux/termux-app

Termux - a terminal emulator application for Android OS extendible by variety of packages.

Java

★63.5K

🍴8K

est. 2015

spring-projects/spring-framework

Spring Framework

Java

★60.3K

🍴38.7K

est. 2010

dbeaver/dbeaver

Free universal database tool and SQL client

Java

★52.2K

🍴4.4K

est. 2015

google/guava

Google core libraries for Java

Java

★51.9K

🍴11.2K

est. 2014

skylot/jadx

Dex to Java decompiler

Java

★51.3K

🍴5.8K

est. 2013

jeecgboot/JeecgBoot

Java

★48.3K

🍴16.2K

est. 2018

ReactiveX/RxJava

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

Java

★48.2K

🍴7.6K

est. 2013

lysine-dev/retrofit

A type-safe HTTP client for Android and the JVM

Java

★43.9K

🍴7.3K

est. 2010

ashishps1/awesome-system-design-resources

Learn System Design concepts and prepare for interviews using free resources.

Java

★42.9K

🍴8.9K

est. 2023

apache/dubbo

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

Java

★41.6K

🍴26.3K

est. 2012

TeamNewPipe/NewPipe

A libre lightweight streaming front-end for Android.

Java

★40.3K

🍴3.9K

est. 2015

YunaiV/ruoyi-vue-pro

Java

★40.1K

🍴8.6K

est. 2021

halo-dev/halo

Halo 是一款强大易用的开源建站工具，从个人博客、知识库，到企业官网、在线商城，Halo 都能助您轻松实现，一站式满足您的多样化建站需求。

Java

★40K

🍴10.3K

est. 2018

alibaba/arthas

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

Java

★37.6K

🍴7.6K

est. 2018

keycloak/keycloak

Open Source Identity and Access Management For Modern Applications and Services

Java

★37.5K

🍴9.1K

est. 2013

eugenp/tutorials

Getting Started with Spring Boot 3:

Java

★37.3K

🍴53.1K

est. 2013

doocs/leetcode

🔥LeetCode solutions in any programming language | 多种编程语言实现 LeetCode、《剑指 Offer（第 2 版）》、《程序员面试金典（第 6 版）》题解

Java

★36.7K

🍴9.5K

est. 2018

geekxh/hello-algorithm

Java

★36.1K

🍴6.4K

est. 2020

airbnb/lottie-android

Render After Effects animations natively on Android and iOS, Web, and React Native

Java

★35.8K

🍴5.4K

est. 2016

yuliskov/SmartTube

Browse media content with your own rules on Android TV

Java

★35.6K

🍴2.2K

est. 2020

netty/netty

Netty project - an event-driven asynchronous network application framework

Java

★35.1K

🍴16.3K

est. 2010

bumptech/glide

An image loading and caching library for Android focused on smooth scrolling

Java

★35K

🍴6.2K

est. 2013

SeleniumHQ/selenium

A browser automation framework and ecosystem.

Java

★34.6K

🍴8.7K

est. 2013

zxing/zxing

ZXing ("Zebra Crossing") barcode scanning library for Java, Android

Java

★34.2K

🍴9.4K

est. 2011

apache/kafka

Apache Kafka - A distributed event streaming platform

Java

★34.1K

🍴15.6K

est. 2011

xkcoding/spring-boot-demo

🚀一个用来深入学习并实战 Spring Boot 的项目。

Java

★34.1K

🍴10.8K

est. 2017

Blankj/AndroidUtilCode

:fire: Android developers should collect the following utils(updating).

Java

★33.6K

🍴10.6K

est. 2016

alibaba/easyexcelArchived

快速、简洁、解决大文件内存溢出的java处理Excel工具

Java

★33.6K

🍴7.5K

est. 2018

alibaba/nacos

an easy-to-use dynamic service discovery, configuration and service management platform for building AI cloud native applications.

Java

★33.5K

🍴13.3K

est. 2018

binarywang/WxJava

微信开发 Java SDK ，支持包括微信支付，开放平台，小程序，企业微信，视频号，公众号等的后端开发

Java

★33.2K

🍴9K

est. 2016

conductor-oss/conductor

Conductor is an event driven agentic workflow engine providing durable and highly resilient execution engine for applications and AI Agents

Java

★32.4K

🍴1K

est. 2023

xuxueli/xxl-job

A distributed task scheduling framework.（分布式任务调度平台XXL-JOB）

Java

★30.6K

🍴11.5K

est. 2015

ityouknow/spring-boot-examples

about learning Spring Boot via examples. Spring Boot 教程、技术栈示例代码，快速简单上手教程。

Java

★30.4K

🍴12.1K

est. 2016

chinabugotech/hutool

🍬A set of tools that keep Java sweet.

Java

★30.2K

🍴7.6K

est. 2014

DrKLO/Telegram

Telegram for Android source

Java

★30.2K

🍴10.4K

est. 2013

opendataloader-project/opendataloader-pdf

PDF Parser for AI-ready data. Automate PDF accessibility. Open-source.

Java

★30.1K

🍴2.9K

est. 2025

kestra-io/kestra

Java

★30K

🍴3.5K

est. 2019

apolloconfig/apollo

Apollo is a reliable configuration management system suitable for microservice configuration management scenarios.

Java

★29.8K

🍴10.1K

est. 2016

alibaba/canal

阿里巴巴 MySQL binlog 增量订阅&消费组件

Java

★29.7K

🍴7.6K

est. 2013

Anuken/Mindustry

The automation tower defense RTS

Java

★29.5K

🍴3.8K

est. 2017

Data via public GitHub API · refreshed every 8h49 of 49 shown

Next step after the language scan

Jump into compare mode, switch to a category surface, or read the methodology when you need to understand how stars, activity, and ecosystem shape combine on this route.

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Java rankings: how to read the ecosystem behind the stars

Java remains one of the most widely deployed languages in enterprise computing, Android development, and big data processing. With mature frameworks like Spring Boot and a robust JVM ecosystem, Java powers mission-critical systems at the world's largest organizations.

The Java ecosystem is synonymous with enterprise reliability: Spring for web services, Hadoop and Spark for big data, and Android SDK for mobile. Recent innovations — Java 21's virtual threads, GraalVM native compilation, and Quarkus for cloud-native development — are keeping Java competitive with newer languages.

Rankings show the top 50 Java repositories by GitHub stars. The mix of enterprise frameworks, developer tools, and educational resources reflects Java's dual role as both a production workhorse and a common first programming language.

Data is sourced from the GitHub REST API and updated daily. Rankings reflect cumulative star counts across each repository's lifetime and should be read as a discovery aid rather than a quality certification. See Methodology & Editorial Standards.

Java rankings: how to read the ecosystem behind the stars