Head First Design Patterns — Practice & Code Examples

This repository contains my personal practice and code examples developed while studying the book "Head First Design Patterns" by Eric Freeman & Elisabeth Robson (2nd Edition).

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💡 My Approach to Learning

• Written from scratch: None of the code in this repository is a blind copy-paste. Every pattern was thoroughly analyzed and then written entirely from scratch based on my own understanding of the logic.
• Focus on deep understanding: By implementing the examples independently without looking at the book's exact source code, I focused on building muscle memory and deeply internalizing object-oriented design principles.
• Isolated drafts: Each folder acts as an independent mini-project or draft focused on a specific Design Pattern from the book.

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🛠 Tech Stack

• Language: Java
• IDE / Editor: Visual Studio Code

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📁 Project Structure

The project is structured into folders representing specific concepts and patterns from the book:

• Strategy — Encapsulating interchangeable behaviors.
• Observer/Smart Home — Implementing loose coupling between objects.
• Decorator — Attaching additional responsibilities to an object dynamically.
• Abstract Factory/Pizza — Creating families of related objects without specifying concrete classes.
• Command/Home Controller — Encapsulating a request as an object to decouple components.
• ...and other folders covering key object-oriented design principles and guidelines.