Java was originally developed as an alternative to the C/C++ programming languages. It is now mainly used for building web, desktop, mobile, and embedded applications. Java is owned and licensed through Oracle, with free and open source implementations available from Oracle and other vendors.

Here are 295,513 public repositories matching this topic...

CyC2018 / CS-Notes

📚 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

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Updated Aug 21, 2024

Snailclimb / JavaGuide

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、系统设计与 AI 应用开发

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Updated Apr 15, 2026
Java

iluwatar / java-design-patterns

Sponsor

Design patterns implemented in Java

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Updated Mar 20, 2026
Java

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。

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Updated Mar 6, 2026
Java

spring-projects / spring-boot

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

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Updated Apr 15, 2026
Java

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

Updated Mar 30, 2026
Java

Stirling-Tools / Stirling-PDF

Sponsor

#1 PDF Application on GitHub that lets you edit PDFs on any device anywhere

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Updated Apr 15, 2026
TypeScript

elastic / elasticsearch

Free and Open Source, Distributed, RESTful Search Engine

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Updated Apr 15, 2026
Java

TheAlgorithms / Java

All Algorithms implemented in Java

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Updated Apr 14, 2026
Java

kdn251 / interviews

Everything you need to know to get the job.

Updated May 12, 2025
Java

youngyangyang04 / leetcode-master

《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！🚀

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Updated Mar 11, 2026
Shell

azl397985856 / leetcode

LeetCode Solutions: A Record of My Problem Solving Journey.( leetcode题解，记录自己的leetcode解题之路。)

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Updated Jul 16, 2025
JavaScript

google / guava

Google core libraries for Java

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Updated Apr 14, 2026
Java

dbeaver / dbeaver

Free universal database tool and SQL client

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Updated Apr 15, 2026
Java

ReactiveX / RxJava

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

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Updated Apr 15, 2026
Java

skylot / jadx

Dex to Java decompiler

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Updated Apr 14, 2026
Java

square / okhttp

Square’s meticulous HTTP client for the JVM, Android, and GraalVM.

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Updated Apr 14, 2026
Kotlin

GitHubDaily / GitHubDaily

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.

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Updated Dec 31, 2025

square / retrofit

A type-safe HTTP client for Android and the JVM

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Updated Apr 9, 2026
HTML

apache / spark

Apache Spark - A unified analytics engine for large-scale data processing

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Updated Apr 15, 2026
Scala