🔐 Login Screen – Java AWT Mini Project

A simple desktop Login Screen application built using Java AWT (Abstract Window Toolkit) that demonstrates GUI programming, event handling, and custom exception handling in Java.

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📌 Features

• GUI-based login form with Username and Password fields
• Password masking (characters hidden with *)
• Custom Exception class (LoginException) for invalid login handling
• 3 login attempts limit — login button disables after all attempts are exhausted
• Clear button to reset input fields
• Window close handler using WindowAdapter

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🛠️ Tech Stack

Technology	Usage
Java	Core programming language
Java AWT	GUI components (Frame, Label, TextField, Button)
OOP Concepts	Custom Exception, Event Handling

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🚀 How to Run

Prerequisites

• Java JDK 8 or above installed
• Any Java IDE (IntelliJ IDEA, Eclipse, NetBeans) or terminal

Steps

# 1. Clone the repository
git clone https://github.com/DEV7040/Mini-Project.git

# 2. Navigate to the project folder
cd Mini-Project

# 3. Compile the Java file
javac LoginScreen.java

# 4. Run the program
java LoginScreen

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🖥️ How It Works

1. Enter the same text in both Username and Password fields to login successfully
2. If credentials don't match, a LoginException is thrown and attempts decrease
3. After 3 failed attempts, the login button is permanently disabled
4. Use the Clear button to reset all fields at any time

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📂 Project Structure

Mini-Project/
│
├── LoginScreen.java     # Main Java source file
└── README.md            # Project documentation

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💡 Concepts Demonstrated

• Java AWT GUI – Building desktop UI without Swing or JavaFX
• Custom Exception Handling – LoginException extends Exception
• Event-Driven Programming – ActionListener interface implementation
• GridLayout – Organizing components in a grid
• WindowAdapter – Handling window close events

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👨‍💻 Author

Devesh Gujarathi
B.Tech Computer Engineering – SNJB's Late Sau. K.B. Jain College of Engineering, Chandwad
GitHub: @DEV7040

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📄 License

This project is open source and available under the MIT License.