✈️ Flight Reservation System (Java CLI)

A console-based flight booking system built using Java that simulates real-world airline reservation workflows including:

• 👤 User authentication
• 🔍 Flight search
• 🧍 Passenger management
• 💺 Seat reservation system

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🚀 Features

• 🔐 User Registration & Login
• 🔍 Search Flights (Source → Destination)
• 🧍 Passenger Details Management
• 💺 Seat Availability & Reservation
• 📅 Date Validation (DOB with Leap Year Support)
• ⚠️ Input Validation & Error Handling

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🧠 System Workflow

📌 Step-by-step flow:

1. Register/Login
2. Search for available flights
3. Add passenger details
4. View seat layout
5. Reserve a seat

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🧩 Project Structure

📁 Flight-Reservation-System
│── ReservationSystem.java   # Main system (entry point)
│── Passenger class          # Passenger details
│── Flight class             # Flight data model
│── FlightRepository         # Flight database
│── User class               # Authentication system
│── ReservationSystemBase    # Seat handling logic

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⚙️ Technologies Used

• ☕ Java (Core Java, OOP)
• 📦 ArrayList (Dynamic Storage)
• 🎯 Exception Handling
• 🧵 2D Arrays (Seat Matrix)

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💺 Seat Layout Representation

• Rows: 1 → N
• Columns: A → F
• [ ] → Available
• [X] → Reserved

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▶️ How to Run

1. Compile the program

javac ReservationSystem.java

2. Run the program

java ReservationSystem

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🖥️ Sample Menu

*** Flight Reservation System ***
1. Register
2. Search for Flights
3. Login
4. Make Reservations
5. Passenger Details
6. Exit

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🔍 Example Usage

Enter source: Pune
Enter destination: Ahmedabad

Found Flights:
Flight Number: FL007
Departure: 2024-03-04 14:00

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⚠️ Validations Implemented

• ❌ Duplicate usernames not allowed
• ❌ Invalid seat selection prevented
• ❌ Must login before booking
• ❌ Passenger details required before reservation
• ❌ Date validation with leap year logic
• ❌ Input mismatch handling (Scanner exceptions)

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💡 Future Enhancements (Make it 10/10 🚀)

• 🌐 GUI (JavaFX / Swing / Web App)
• 💳 Payment Integration
• 🗂️ Database (MySQL / MongoDB)
• 🔐 Password hashing (Security upgrade)
• 🎟️ Ticket generation (PDF)
• 📱 REST API backend (Spring Boot)
• 🤖 AI-based seat recommendation

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🧪 Edge Cases Handled

• Invalid input (letters instead of numbers)
• Already reserved seats
• Wrong login credentials
• Invalid date formats

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📈 Learning Outcomes

• Object-Oriented Programming (OOP)
• Real-world system design
• Data structures (ArrayList, 2D arrays)
• Exception handling
• CLI application design

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👩‍💻 Author

PoojaCodesX

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⭐ Support

If you like this project:

• ⭐ Star this repo
• 🍴 Fork it
• 📢 Share it

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📜 License

This project is licensed under the MIT License