Members Registry & Stopwatch Suite

A dual-function desktop application built with JavaFX that demonstrates robust data persistence and real-time UI handling.

This project was built to demonstrate Object-Oriented Design patterns, MVC architecture, and programmatic UI development (Pure JavaFX without FXML).

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✨ Key Features

• Member Management: A persistent CRUD system for managing member profiles (Name, Phone, Email, ID).
• Data Persistence: Automatic serialization/deserialization of Java objects to JSON using Jackson Databind.
• Precision Stopwatch: A dedicated stopwatch tool utilizing AnimationTimer for accurate, high-frequency time tracking (60 FPS).
• Concurrency: Separated UI logic from timing threads to ensure a responsive interface.
• Dynamic Styling: Centralized CSS styling for consistent application theming.

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🛠️ Technical Architecture

The application follows a Model-View-Controller (MVC) architecture to ensure separation of concerns.

Design Patterns Implemented

• MVC Pattern: Strictly separates the data (Member), the interface (MembersView), and the logic (MembersController).
• Repository Pattern: The MemberRepository handles all data retrieval and storage, decoupling the file I/O details from the business logic.
• Observer Pattern: Used implicitly by JavaFX components to update the UI when underlying data models change.

Technology Stack

• Core: Java 8+, JavaFX (Programmatic DOM, No FXML)
• Persistence: Jackson (JSON Data Binding)
• Build Tool: Maven
• UI Assets: Custom CSS Theming

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🚀 Getting Started

To run the application locally:

1. Clone the repository
2. Build with Maven:

   mvn clean install

3. Run:

   mvn javafx:run

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📂 Project Structure

src/com/nilsson
├── application/    # Application Entry Point
├── controller/     # Event Handling & Logic bridging
├── model/          # Data Entities (POJOs)
├── repository/     # JSON File I/O & Persistence
├── view/           # Pure JavaFX Layouts (No FXML)
└── styling/        # CSS Resources & Assets

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📜 License

This project was developed for educational purposes as part of a System Development course. Distributed under the MIT License.

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