Java is a versatile, object-oriented programming language that plays a significant role in software development, particularly for application developers aiming to build scalable, robust, and cross-platform applications. Known for its "write once, run anywhere" capability, Java allows developers to write code that can run on any device equipped with a Java Virtual Machine (JVM), making it ideal for developing desktop, web, and mobile applications. Features such as automatic memory management and strong security architecture make Java a preferred choice for complex applications. Its extensive libraries and frameworks, such as Spring and Hibernate, along with a thriving community and ecosystem of tools like IntelliJ IDEA and Eclipse, further facilitate efficient development processes. Application developers can leverage Java’s concurrent processing capabilities and powerful APIs to engineer responsive, high-performance applications that can efficiently handle large-scale operations and data processing tasks.
View the most prominent open source Java projects in the list below. Click on a specific project to view its alternative or complementary packages. Make comparisons and find the best package for your app.
- 技术面试必备基础知识、Leetcode、计算机操作系统、计算机网络、系统设计☆183,723Aug 21, 2024Updated last year
- Java 面试 & 后端通用面试指南，覆盖计算机基础、数据库、分布式、高并发与系统设计。准备后端技术面试，首选 JavaGuide！☆153,835Updated this week
- Design patterns implemented in Java☆93,774Updated this week
- 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…☆82,938Feb 2, 2026Updated 3 weeks ago
- Spring Boot helps you to create Spring-powered, production-grade applications and services with absolute minimum fuss.☆80,078Updated this week
- 😮 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☆78,851Jan 21, 2026Updated last month
- Free and Open Source, Distributed, RESTful Search Engine☆76,165Updated this week
- #1 PDF Application on GitHub that lets you edit PDFs on any device anywhere☆74,478Updated this week
- All Algorithms implemented in Java☆65,083Feb 20, 2026Updated last week
- Everything you need to know to get the job.☆64,957May 12, 2025Updated 9 months ago
- 《代码随想录》LeetCode 刷题攻略：200道经典题目刷题顺序，共60w字的详细图解，视频难点剖析，50余张思维导图，支持C++，Java，Python，Go，JavaScript等多语言版本，从此算法学习不再迷茫！🔥🔥 来看看，你会发现相见恨晚！🚀☆60,408Jan 27, 2026Updated last month
- LeetCode Solutions: A Record of My Problem Solving Journey.( leetcode题解，记录自己的leetcode解题之路。)☆55,818Jul 16, 2025Updated 7 months ago
- Google core libraries for Java☆51,479Updated this week
- RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for t…☆48,531Updated this week
- Free universal database tool and SQL client☆48,767Updated this week
- Dex to Java decompiler☆47,334Feb 17, 2026Updated last week
- Square’s meticulous HTTP client for the JVM, Android, and GraalVM.☆46,897Updated this week
- 坚持分享 GitHub 上高质量、有趣实用的开源技术教程、开发者工具、编程网站、技术资讯。A list cool, interesting projects of GitHub.☆45,237Dec 31, 2025Updated last month
- A type-safe HTTP client for Android and the JVM☆43,893Updated this week
- Apache Spark - A unified analytics engine for large-scale data processing☆42,850Updated this week
- The java implementation of Apache Dubbo. An RPC and microservice framework.☆41,738Feb 20, 2026Updated last week
- Platform to build admin panels, internal tools, and dashboards. Integrates with 25+ databases and any API.☆39,205Updated this week
- A powerful 🚀 Android chart view / graph view library, supporting line- bar- pie- radar- bubble- and candlestick charts as well as scalin…☆38,227Jun 5, 2025Updated 8 months ago
- Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas☆37,098Updated this week
- 【Java面试+Java学习指南】 一份涵盖大部分Java程序员所需要掌握的核心知识。☆36,872Nov 3, 2025Updated 3 months ago
- 🔥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☆35,668Updated this week
- 🚀一个用来深入学习并实战 Spring Boot 的项目。☆34,085Jul 24, 2024Updated last year
- A browser automation framework and ecosystem.☆34,056Feb 20, 2026Updated last week
- ZXing ("Zebra Crossing") barcode scanning library for Java, Android☆33,867Feb 4, 2026Updated 3 weeks ago
- 快速、简洁、解决大文件内存溢出的java处理Excel工具☆33,763Oct 29, 2024Updated last year
- 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☆32,563Feb 9, 2026Updated 2 weeks ago
- Conductor is an event driven agentic orchestration platform providing durable and highly resilient execution engine for applications and …☆31,478Updated this week
- 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。☆30,647Nov 18, 2023Updated 2 years ago
- 🍬A set of tools that keep Java sweet.☆30,341Feb 9, 2026Updated 2 weeks ago
- A distributed task scheduling framework.（分布式任务调度平台XXL-JOB）☆29,921Feb 11, 2026Updated 2 weeks ago
- A memory leak detection library for Android.☆29,897Feb 4, 2026Updated 3 weeks ago
- Spring Cloud Alibaba provides a one-stop solution for application development for the distributed solutions of Alibaba middleware.☆29,049Updated this week
- Browse media content with your own rules on Android TV☆28,361Updated this week
- 👨🎓 Java Core Sprout : basic, concurrent, algorithm☆27,027May 21, 2024Updated last year
- The automation tower defense RTS☆26,674Updated this week