Top 10 Most Popular Java Open‑Source Projects on GitHub in October

Below are the ten Java projects that topped GitHub’s star rankings in October, ranging from algorithm collections to full‑stack e‑commerce systems and a popular open‑source game.

1. TheAlgorithms/Java – A comprehensive repository of Java implementations of classic algorithms. https://github.com/TheAlgorithms/Java – ★ 18,468 stars.

2. eladmin – A Spring Boot 2.1.0 based admin system with JPA, Spring Security, Redis, and a Vue front‑end; features RBAC, data dictionaries, dynamic routing, and one‑click code generation. https://github.com/elunez/eladmin – ★ 4,639 stars.

3. mall (macrozheng/mall) – A small e‑commerce demo built with Spring Boot (backend) and Vue (admin front‑end), also offering a WeChat mini‑program front‑end. https://github.com/macrozheng/mall – ★ 24,084 stars.

4. java-design-patterns – A collection of Java implementations of classic design patterns, serving as a best‑practice guide for solving common software design problems. https://github.com/iluwatar/java-design-patterns – ★ 52,341 stars.

5. JavaGuide – An extensive Java learning guide covering core knowledge required by most Java developers. https://github.com/Snailclimb/JavaGuide – ★ 59,540 stars.

6. paascloud-master – A Spring Cloud + Vue + OAuth2.0 “full‑stack” demo that simulates a complete e‑commerce workflow and back‑office operations, supporting third‑party logins such as WeChat. https://github.com/paascloud/paascloud-master – ★ 6,302 stars.

7. netty – A widely used Java networking framework offering asynchronous, event‑driven APIs for building high‑performance servers and clients. https://github.com/netty/netty – ★ 21,346 stars.

8. views-widgets-samples – A collection of Android Studio sample projects that demonstrate various Android view and widget functionalities. https://github.com/android/views-widgets-samples – ★ 479 stars.

9. ksql – Confluent’s streaming SQL engine for Apache Kafka, enabling real‑time data processing with SQL without writing Java or Python code. https://github.com/confluentinc/ksql – ★ 2,606 stars.

10. Mindustry – An open‑source tower‑defense/factory‑building game; the source can be compiled with Java 8 and JDK 8. https://github.com/Anuken/Mindustry – ★ 1,644 stars.

These projects provide valuable resources for Java developers interested in algorithms, backend architecture, design patterns, cloud‑native applications, Android development, streaming data, and game development.