Java
Tracked open-source repos with Java as the primary language, sorted by stars.
- #1hello-algo@krahets
《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
★ 129,641+130Star change over the last 7 days - #2java-design-patterns@iluwatar
Design patterns implemented in Java
★ 94,632+35Star change over the last 7 days - #3Stirling-PDF@Stirling-Tools
#1 PDF Application on GitHub that lets you edit PDFs on any device anywhere
★ 90,773+821Star change over the last 7 days - #4mall@macrozheng
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。
★ 84,646+61Star change over the last 7 days - #5spring-boot@spring-projects
Spring Boot helps you to create Spring-powered, production-grade applications and services with absolute minimum fuss.
★ 81,374+48Star change over the last 7 days - #6advanced-java@doocs
😮 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
★ 79,086+13Star change over the last 7 days - #7elasticsearch@elastic
Free and Open Source, Distributed, RESTful Search Engine
★ 77,872+20Star change over the last 7 days - #8LeetCodeAnimation@MisterBooo
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）
★ 76,699+3Star change over the last 7 days - #9ghidra@NationalSecurityAgency
Ghidra is a software reverse engineering (SRE) framework
★ 73,052+455Star change over the last 7 days - #10Java@TheAlgorithms
All Algorithms implemented in Java
★ 66,191+25Star change over the last 7 days - #11interviews@kdn251
Everything you need to know to get the job.
★ 65,229+8Star change over the last 7 days - #12spring-framework@spring-projects
Spring Framework
★ 60,211+6Star change over the last 7 days - #13termux-app@termux
Termux - a terminal emulator application for Android OS extendible by variety of packages.
★ 59,892+386Star change over the last 7 days - #14guava@google
Google core libraries for Java
★ 51,894+6Star change over the last 7 days - #15dbeaver@dbeaver
Free universal database tool and SQL client
★ 51,567+76Star change over the last 7 days - #16jadx@skylot
Dex to Java decompiler
★ 50,239+94Star change over the last 7 days - #17RxJava@ReactiveX
RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.
★ 48,208+3Star change over the last 7 days - #18JeecgBoot@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。
★ 47,511+89Star change over the last 7 days - #19retrofit@lysine-dev
A type-safe HTTP client for Android and the JVM
★ 43,937+2Star change over the last 7 days - #20dubbo@apache
The java implementation of Apache Dubbo. An RPC and microservice framework.
★ 41,560+3Star change over the last 7 days - #21awesome-system-design-resources@ashishps1
Learn System Design concepts and prepare for interviews using free resources.
★ 40,994+192Star change over the last 7 days - #22halo@halo-dev
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。
★ 39,629+112Star change over the last 7 days - #23NewPipe@TeamNewPipe
A libre lightweight streaming front-end for Android.
★ 39,505+90Star change over the last 7 days - #24ruoyi-vue-pro@YunaiV
🔥 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！
★ 39,025+165Star change over the last 7 days - #25MPAndroidChart@PhilJay
A powerful 🚀 Android chart view / graph view library, supporting line- bar- pie- radar- bubble- and candlestick charts as well as scaling, panning and animations.
★ 38,192+0Star change over the last 7 days - #26arthas@alibaba
Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas
★ 37,502+3Star change over the last 7 days - #27tutorials@eugenp
Getting Started with Spring Boot 3:
★ 37,328+5Star change over the last 7 days - #28leetcode@doocs
🔥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
★ 36,514+35Star change over the last 7 days - #29keycloak@keycloak
Open Source Identity and Access Management For Modern Applications and Services
★ 36,454+136Star change over the last 7 days - #30lottie-android@airbnb
Render After Effects animations natively on Android and iOS, Web, and React Native
★ 35,712+8Star change over the last 7 days
