📅 Leap Year Checker

A console-based Leap Year Checker built using Java and Object-Oriented Programming (OOP) principles.
This beginner-friendly project allows users to check multiple years in a loop, handles invalid inputs gracefully using exception handling, and follows clean code practices.

🚀 Features

• ✅ Check whether a year is a leap year
• 🔁 Loop to check multiple years in one run
• 🧱 OOP-based design (separate logic and UI)
• 🚫 Exception handling for invalid inputs
• ⌨️ User input using Scanner
• 🧼 Clean, readable, and beginner-friendly code

🧠 Leap Year Rules

A year is a Leap Year if:

• It is divisible by 400, OR
• It is divisible by 4 but not divisible by 100

🛠️ Technologies Used

• Java
• OOP Concepts
• Exception Handling
• Scanner (User Input)

📂 Project Structure

LeapYearChecker/
│
├── LeapYearService.java // Business logic
├── LeapYearCheckerApp.java // Main application
└── README.md

▶️ How to Run

1. Clone the repository:

   git clone https://github.com/yogeshkumarsaini/LeapYearChecker.git

2. Navigate to the project folder:

   cd LeapYearChecker

3. Compile the program:

   javac LeapYearCheckerApp.java

4. Run the application:

   java LeapYearCheckerApp

🧪 Sample Output

📅 Leap Year Checker

Enter a year: 2024
2024 is a Leap Year ✅

Do you want to check another year? (y/n): y

Enter a year: 1900
1900 is NOT a Leap Year ❌

🧩 Concepts Covered

• if–else conditions

• Modulus operator %

• Methods

• Classes & Objects (OOP)

• Loops

• Exception handling

• User input with Scanner

  ---

  📌 Future Enhancements

• 📜 Store checked years in a list

• 📊 Display leap year history

• 🧪 Add JUnit test cases

• 🖥️ GUI version using Swing/JavaFX