📚 Java Knowledge Base

A comprehensive collection of Java notes organized for seamless navigation in Obsidian. Perfect for Java developers from beginners to advanced, these notes cover everything from core concepts to specialized topics like reflection, Spring Boot, streams, and multithreading.

🎯 Purpose

This repository serves as both a personal reference and a learning resource for the Java community. Each note is crafted to provide clear explanations, practical examples, and best practices for Java development.

📋 Table of Contents

• Core Java Concepts
• Reflection API
• Spring Boot Framework
• Java Streams
• Multithreading
• Getting Started
• Contributing
• License

Core Java Concepts

Explore foundational Java programming concepts:

• Object-Oriented Programming - Encapsulation, inheritance, polymorphism, and abstraction
• Language Features - Annotations, lambda expressions, method references
• Design Principles - POJO structure, proper encapsulation with getters/setters
• Memory Management - Understanding the Java Memory Model
• Interfaces & Abstractions - When and how to use each effectively

Reflection API

Learn about Java's powerful introspection capabilities:

• Runtime Type Information - Examining classes during execution
• Dynamic Invocation - Calling methods and accessing fields programmatically
• Practical Applications - Real-world use cases with code examples

Spring Boot Framework

Dive into modern Java application development:

• Spring Core - IoC container, dependency injection, bean lifecycle
• Aspect-Oriented Programming - Cross-cutting concerns, pointcuts, advice types
• Proxies - Understanding Spring's proxy mechanisms
• Configuration - Annotations vs. XML, best practices

Java Streams

Master Java's functional-style operations:

• Stream Processing - Filtering, mapping, reducing collections
• Collectors - Transforming streams back into practical data structures
• Optional - Properly handling nullable values
• Parallel Processing - Leveraging multi-core architectures for performance

Multithreading

Control concurrent execution in Java applications:

• Thread Fundamentals - Creation, lifecycle, and management
• Thread Pools - Efficient resource utilization with ExecutorService
• Concurrency Patterns - Practical solutions to common threading problems

Getting Started

Prerequisites

• Obsidian (for optimal viewing experience)
• Basic understanding of Java programming

Installation

1. Clone this repository:

   git clone https://github.com/yourusername/java-notes.git

2. Open the repository folder as a vault in Obsidian:

   • Launch Obsidian
   • Click "Open folder as vault"
   • Select the cloned repository folder

3. Start exploring the notes through the folder structure or use Obsidian's powerful search and graph view features.

Contributing

Contributions are welcome! If you have suggestions, corrections, or additional notes to share:

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-note)
3. Commit your changes (git commit -m 'Add some amazing notes')
4. Push to the branch (git push origin feature/amazing-note)
5. Open a Pull Request

License

This project is licensed under the MIT License - see the LICENSE file for details.

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Happy coding and learning! 🚀