STUDY COMMON DESIGN PATTERNS

1. About this project

This project contains many sample codes for demonstrating the usage of the following design patterns:

• The Strategy Pattern.
• The Observer Pattern.
• The Decorator Pattern.
• The Factory Pattern.
• The Singleton Pattern.
• The Command Pattern.
• The Adapter and Facade Patterns.
• The Template Method Pattern.
• The Iterator and Composite Patterns.
• The State Pattern.
• The Proxy Pattern.

2. Reference

• The problem in each module is from the book Head First Design Patterns, 2nd Edition by Eric Freeman and Elisabeth Robson.
• The code in this project is referenced from that book.

3. Object-Oriented (OO) Design Principles

• Encapsulate what varies.
• Favor composition over inheritance.
• Program to interfaces, not implementations.
• Strive for loosely coupled designs between objects that interact.
• Classes should be open for extension but closed for modification.