Top starred Java repos

「Java学习+面试指南」一份涵盖大部分 Java 程序员所需要掌握的核心知识。准备 Java 面试，首选 JavaGuide！

:cn: GitHub中文排行榜，各语言分设「软件 | 资料」榜单，精准定位中文好项目。各取所需，高效学习。

《Hello 算法》：动画图解、一键运行的数据结构与算法教程。支持 Python, Java, C++, C, C#, JS, Go, Swift, Rust, Ruby, Kotlin, TS, Dart 代码。简体版和繁体版同步更新，English version ongoing

Design patterns implemented in Java

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SpringBoot+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。

😮 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

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）

Spring Boot

Free and Open, Distributed, RESTful Search Engine

Everything you need to know to get the job.

All Algorithms implemented in Java

Spring Framework

Google core libraries for Java

Ghidra is a software reverse engineering (SRE) framework

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

Dex to Java decompiler

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

🔥「企业级低代码平台」前后端分离架构SpringBoot 2.x/3.x，SpringCloud，Ant Design&Vue3，Mybatis，Shiro，JWT。强大的代码生成器让前后端代码一键生成，无需写任何代码! 引领新的开发模式OnlineCoding->代码生成->手工MERGE，帮助Java项目解决70%重复工作，让开发更关注业务，既能快速提高效率，帮助公司节省成本，同时又不失灵活性。

Free universal database tool and SQL client

A powerful 🚀 Android chart view / graph view library, supporting line- bar- pie- radar- bubble- and candlestick charts as well as scaling, panning and animations.

Just Announced - "Learn Spring Security OAuth":

#1 Locally hosted web application that allows you to perform various operations on PDF files

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

🌍 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

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

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

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

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

Netty project - an event-driven asynchronous network application framework

强大易用的开源建站工具。

🚀一个用来深入学习并实战 Spring Boot 的项目。

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

快速、简洁、解决大文件内存溢出的java处理Excel工具

A libre lightweight streaming front-end for Android.

🔥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

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。

A browser automation framework and ecosystem.

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

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

🍬A set of tools that keep Java sweet.

阿里巴巴 MySQL binlog 增量订阅&消费组件

循序渐进，学习Spring Boot、Spring Boot & Shiro、Spring Batch、Spring Cloud、Spring Cloud Alibaba、Spring Security & Spring Security OAuth2，博客Spring系列源码：https://mrbird.cc

Mirror of Apache Kafka

阿里云计算平台DataWorks(https://help.aliyun.com/document_detail/137663.html) 团队出品，为监控而生的数据库连接池

Spring Cloud Alibaba provides a one-stop solution for application development for the distributed solutions of Alibaba middleware.

微人事是一个前后端分离的人力资源管理系统，项目采用SpringBoot+Vue开发。

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

👨‍🎓 Java Core Sprout : basic, concurrent, algorithm

⭐⭐⭐⭐秒杀系统设计与实现.互联网工程师进阶与分析🙋🐓

🔥 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、AI 大模型等功能。你的 ⭐️ Star ⭐️，是作者生发的动力！

FASTJSON 2.0.x has been released, faster and more secure, recommend you upgrade.

Bind Android views and callbacks to fields and methods.

To Be Top Javaer - Java工程师成神之路

A private messenger for Android.

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

http下载工具，基于http代理，支持多连接分块下载

🔥下拉刷新、上拉加载、二级刷新、淘宝二楼、RefreshLayout、OverScroll，Android智能下拉刷新框架，支持越界回弹、越界拖动，具有极强的扩展性，集成了几十种炫酷的Header和 Footer。

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

Telegram for Android source

Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex distributed systems where failure is inevitable.

Apache Flink

APM, Application Performance Monitoring System

A Java serialization/deserialization library to convert Java Objects into JSON and back

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 ...

Jenkins automation server

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

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)

The automation tower defense RTS

This project is deprecated and stale. The latest ExoPlayer code is available in https://github.com/androidx/media

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

MyBatis SQL mapper framework for Java

A tool for reverse engineering Android apk files

JDK main-line development https://openjdk.org/projects/jdk

又一个小商城。litemall = Spring Boot后端 + Vue管理员前端 + 微信小程序用户前端 + Vue用户移动端

一个涵盖六个专栏：Spring Boot 2.X、Spring Cloud、Spring Cloud Alibaba、Dubbo、分布式消息队列、分布式事务的仓库。希望胖友小手一抖，右上角来个 Star，感恩 1024

Implementation of ImageView for Android that supports zooming, by various touch gestures.

CAT 作为服务端项目基础组件，提供了 Java, C/C++, Node.js, Python, Go 等多语言客户端，已经在美团点评的基础架构中间件框架（MVC框架，RPC框架，数据库框架，缓存框架等，消息队列，配置系统等）深度集成，为美团点评各业务线提供系统丰富的性能指标、健康状况、实时告警等。

A collection of algorithms and data structures

LSPosed Framework

An powerful enhanced toolkit of MyBatis for simplify development

spring boot 实践学习案例，是 spring boot 初学者及核心技术巩固的最佳实践。

Modular and customizable Material Design UI components for Android

A server software reimplementation for a certain anime game.

ruoyi-vue-pro 全新 Cloud 版本，优化重构所有功能。基于 Spring Cloud Alibaba + MyBatis Plus + Vue & Element 实现的后台管理系统 + 用户小程序，支持 RBAC 动态权限、多租户、数据权限、工作流、三方登录、支付、短信、商城、CRM、ERP、AI 大模型等功能。你的 ⭐️ Star ⭐️，是作者生发的动力！

The official home of the Presto distributed SQL query engine for big data

DataX是阿里云DataWorks数据集成的开源版本。

A high performance caching library for Java

This is a sample app that is part of a series of blog posts I have written about how to architect an android application using Uncle Bob's clean architecture approach.

A simple app to use Xposed without root, unlock the bootloader or modify system image, etc.

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

Apache Hadoop

A circular ImageView for Android

A Java 8+ Jar & Android APK Reverse Engineering Suite (Decompiler, Editor, Debugger & More)

🔥🔥🔥AI-driven database tool and SQL client, The hottest GUI client, supporting MySQL, Oracle, PostgreSQL, DB2, SQL Server, DB2, SQLite, H2, ClickHouse, and more.

💪 A framework for assisting in the renovation of Android componentization (帮助 Android App 进行组件化改造的路由框架)

flink learning blog. http://www.54tianzhisheng.cn/ 含 Flink 入门、概念、原理、实战、性能调优、源码解析等内容。涉及 Flink Connector、Metrics、Library、DataStream API、Table API & SQL 等内容的学习案例，还有 Flink 落地应用的大型项目案例（PVUV、日志存储、百亿数据实时去重、监控告警）分享。欢迎大家支持我的专栏《大数据实时计算引擎 Flink 实战与性能优化》

提高 Android UI 开发效率的 UI 库

👶🏻 신입 개발자 전공 지식 & 기술 면접 백과사전 📖

Apache Pulsar - distributed pub-sub messaging system

A standalone Java Decompiler GUI

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...

🏗 Build container images for your Java applications.

Luban(鲁班)—Image compression with efficiency very close to WeChat Moments/可能是最接近微信朋友圈的图片压缩算法

Android Transition animations explanation with examples.

Spring源码阅读

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.

🔥 A low-cost Android screen adaptation solution (今日头条屏幕适配方案终极版，一个极低成本的 Android 屏幕适配方案).

This is a picker view for android , support linkage effect, timepicker and optionspicker.（时间选择器、省市区三级联动）

Zuul is a gateway service that provides dynamic routing, monitoring, resiliency, security, and more.

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

Picture Selector Library for Android or 图片选择器

Git Server with CI/CD, Kanban, and Packages. Seamless integration. Unparalleled experience.

mall学习教程，架构、业务、技术要点全方位解析。mall项目（60k+star）是一套电商系统，使用现阶段主流技术实现。涵盖了SpringBoot、MyBatis、Elasticsearch、RabbitMQ、Redis、MongoDB、Mysql等技术，采用Docker容器化部署。

Conductor is a microservices orchestration engine.

Stetho is a debug bridge for Android applications, enabling the powerful Chrome Developer Tools and much more.

:fireworks: A well-designed local image and video selector for Android

VasSonic is a lightweight and high-performance Hybrid framework developed by tencent VAS team, which is intended to speed up the first screen of websites working on Android and iOS platform.

🥤 COLA: Clean Object-oriented & Layered Architecture

A scalable web crawler framework for Java.

A declarative API to handle Android runtime permissions.

An Android library that allows you to easily create applications with slide-in menus. You may use it in your Android apps provided that you cite this project and include the license in your app. Thanks!

Interview questions

Paging indicator widgets compatible with the ViewPager from the Android Support Library and ActionBarSherlock.

Activiti is a light-weight workflow and Business Process Management (BPM) Platform targeted at business people, developers and system admins. Its core is a super-fast and rock-solid BPMN 2 process engine for Java. It's open-source and distributed under the Apache license. Activiti runs in any Java application, on a server, on a cluster or in the cloud. It integrates perfectly with Spring, it is extremely lightweight and based on simple concepts.

A configuration as code language with rich validation and tooling.

Simplify Android M system permissions

The most widely used, high performance Minecraft server that aims to fix gameplay and mechanics inconsistencies

Android开源弹幕引擎·烈焰弹幕使 ～

Spring Security

A free, secure and open source app for Android to manage your 2-step verification tokens.

A fast build system that encourages the creation of small, reusable modules over a variety of platforms and languages.

StarRocks, a Linux Foundation project, is a next-generation sub-second MPP OLAP database for full analytics scenarios, including multi-dimensional analytics, real-time analytics, and ad-hoc queries.

Java Native Access

hsweb (haʊs wɛb) 是一个基于spring-boot 2.x开发 ,首个使用全响应式编程的企业级后台管理系统基础项目。

A Material Design ViewPager easy to use library