Java Developer Knowledge Base

A comprehensive, community-driven reference for Java and Spring Boot developers. Covers everything from core Java to Kafka, Docker, Kubernetes, and beyond — with practical code examples, architectural explanations, and interview preparation.

Built by developers, for developers. All content is written from a hands-on perspective with real-world Spring Boot context.

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📚 Contents

☕ Java

1. Core Java
2. Modern Java Features
3. Enterprise Java
4. Specialized Topics

🌱 Spring & Spring Boot

1. Spring Core Fundamentals
2. Spring Boot
3. Spring MVC & REST
4. Data Access
5. Security
6. Testing
7. Reactive Programming (Spring WebFlux)
8. Advanced Topics
9. Interview Preparation

🗄️ Databases

1. SQL Databases
2. Database Migrations
3. NoSQL

📨 Message Brokers

1. Apache Kafka

🐳 CI/CD, Docker, Kubernetes & Helm

1. Docker
2. Kubernetes
3. Helm
4. CI/CD

🔧 Git, Maven & Gradle

1. Git
2. Maven
3. Gradle

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Who This Is For

• Java developers (2–8 years experience) looking for a structured reference
• Developers preparing for senior/lead engineering interviews
• Anyone wanting a practical guide that goes beyond official documentation

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🤝 Contributing

Contributions are very welcome! Whether it's fixing a typo, improving a code example, or adding an entire new section — every improvement helps the community.

Please read CONTRIBUTING.md before submitting a PR.

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📄 License

MIT