Welcome to the Design Patterns Repository, a comprehensive collection of design pattern implementations in Java. This repository serves as a learning resource for developers aiming to understand and apply design patterns effectively in real-world projects.

Design patterns are essential in software development, providing reusable solutions to common problems. This repository is structured to demonstrate various creational, structural, and behavioral design patterns with well-documented Java implementations.

The repository is organized by design pattern categories:

Design Patterns/ ├── src/ │ ├── creational/ │ │ ├── singleton/ │ │ │ ├── thread_safe/ │ │ │ │ ├── Logger.java │ │ │ │ ├── TicketReservation.java │ │ │ │ └── User.java │ │ │ └── ... (other singleton implementations) │ │ ├── factory/ │ │ │ └── ... │ │ └── ... (other creational patterns) │ ├── structural/ │ │ ├── adapter/ │ │ │ └── ... │ │ ├── decorator/ │ │ │ └── ... │ │ └── ... (other structural patterns) │ ├── behavioral/ │ │ ├── observer/ │ │ │ └── ... │ │ ├── strategy/ │ │ │ └── ... │ │ └── ... (other behavioral patterns) │ └── Main.java ├── .gitignore └── README.md 

Each category contains subdirectories for individual patterns, where you’ll find Java source code along with necessary documentation.

Patterns that focus on efficient object creation.

• Singleton

  • Implemented a thread-safe Singleton Logger using double-checked locking.
  • Demonstrated usage through a multithreaded Ticket Reservation system.

• Factory Method (To be added)

• Abstract Factory (To be added)

• Builder (To be added)

• Prototype (To be added)

Patterns that deal with class and object composition.

• Adapter (To be added)
• Decorator (To be added)
• Facade (To be added)
• Proxy (To be added)

Patterns that focus on communication between objects.

• Observer (To be added)
• Strategy (To be added)
• Command (To be added)
• State (To be added)

git clone <repository_url>

cd Design-Patterns

Using an IDE (IntelliJ IDEA, Eclipse, etc.):

1. Import the project as a Maven/Gradle project.
2. Run Main.java or specific pattern implementations.

Using the Command Line:

1. Compile Java files:

   javac -d out src/**/*.java

2. Run the main class:

   java -cp out Main

Browse the src directory to find implementations for various design patterns.

Contributions are welcome! To contribute:

1. Fork the repository.
2. Create a new branch for your feature or bug fix.
3. Commit your changes with a meaningful message.
4. Push your branch to your forked repository.
5. Submit a Pull Request for review.

• Follow the Google Java Style Guide.

• Maintain clean and well-documented code.

• Write unit tests wherever applicable.

• Use meaningful variable and method names.

• Commit messages should follow the format:

  <type>[optional scope]: <description>