import java.util.HashMap;
import java.util.Scanner;
public class AirlineManagementSystem {
// Default Admin credentials
private static final String ADMIN_USER = "admin";
private static final String ADMIN_PASS = "password";
// HashMaps to store customer and carrier details (simulating a database)
private static HashMap<String, Customer> customers = new HashMap<>();
private static HashMap<String, Carrier> carriers = new HashMap<>();
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
// Welcome message
System.out.println("Welcome to Airline Management System - AMS");
System.out.println("1. Admin Sign-in");
System.out.println("2. Customer Sign-in");
System.out.print("Enter choice (1 or 2): ");
int choice = scanner.nextInt();
scanner.nextLine(); // Consume newline
switch (choice) {
case 1:
adminLogin(scanner);
break;
case 2:
customerLogin(scanner);
break;
default:
System.out.println("Invalid choice! Please enter 1 or 2.");
}
scanner.close();
}
// Admin login method
private static void adminLogin(Scanner scanner) {
System.out.print("Enter Admin UserId: ");
String userId = scanner.nextLine();
System.out.print("Enter Admin Password: ");
String password = scanner.nextLine();
if (userId.equals(ADMIN_USER) && password.equals(ADMIN_PASS)) {
System.out.println("Admin logged in successfully!");
adminMenu(scanner);
} else {
System.out.println("Invalid Admin credentials!");
}
}
// Customer login method
private static void customerLogin(Scanner scanner) {
System.out.print("Enter Customer UserId: ");
String userId = scanner.nextLine();
System.out.print("Enter Customer Password: ");
String password = scanner.nextLine();
if (customers.containsKey(userId) && customers.get(userId).getPassword().equals(password)) {
System.out.println("Customer logged in successfully!");
customerMenu(scanner, userId);
} else {
System.out.println("Invalid Customer credentials or user does not exist!");
}
}
// Admin menu for managing carriers
private static void adminMenu(Scanner scanner) {
while (true) {
System.out.println("\nAdmin Menu:");
System.out.println("1. Add Carrier");
System.out.println("2. Edit Carrier Details by CarrierId");
System.out.println("3. Remove Carrier by Id");
System.out.println("4. Flight Cancellation - Refund Price Calculation");
System.out.println("5. Exit AMS");
System.out.print("Enter choice: ");
int choice = scanner.nextInt();
scanner.nextLine(); // Consume newline
switch (choice) {
case 1:
addCarrier(scanner);
break;
case 2:
editCarrier(scanner);
break;
case 3:
removeCarrier(scanner);
break;
case 4:
flightCancellation(scanner);
break;
case 5:
System.out.println("Exiting AMS...");
return;
default:
System.out.println("Invalid choice! Please try again.");
}
}
}
// Customer menu for managing profile and booking
private static void customerMenu(Scanner scanner, String userId) {
while (true) {
System.out.println("\nCustomer Menu:");
System.out.println("1. Customer Registration");
System.out.println("2. Edit Customer Profile");
System.out.println("3. Ticket Booking - Price Calculation");
System.out.println("4. Ticket Cancellation - Refund Price Calculation");
System.out.println("5. Exit AMS");
System.out.print("Enter choice: ");
int choice = scanner.nextInt();
scanner.nextLine(); // Consume newline
switch (choice) {
case 1:
customerRegistration(scanner);
break;
case 2:
editCustomerProfile(scanner, userId);
break;
case 3:
ticketBooking(scanner, userId);
break;
case 4:
ticketCancellation(scanner, userId);
break;
case 5:
System.out.println("Exiting AMS...");
return;
default:
System.out.println("Invalid choice! Please try again.");
}
}
}
// Add carrier (flight details) method
private static void addCarrier(Scanner scanner) {
System.out.print("Enter Carrier Id: ");
String carrierId = scanner.nextLine();
System.out.print("Enter Carrier Name: ");
String name = scanner.nextLine();
System.out.print("Enter Flight Capacity: ");
int capacity = scanner.nextInt();
System.out.print("Enter Ticket Price: ");
double ticketPrice = scanner.nextDouble();
scanner.nextLine(); // Consume newline
Carrier carrier = new Carrier(carrierId, name, capacity, ticketPrice);
carriers.put(carrierId, carrier);
System.out.println("Carrier added successfully!");
}
// Edit carrier details by CarrierId
private static void editCarrier(Scanner scanner) {
System.out.print("Enter Carrier Id to edit: ");
String carrierId = scanner.nextLine();
if (carriers.containsKey(carrierId)) {
Carrier carrier = carriers.get(carrierId);
System.out.println("Editing carrier: " + carrier.getName());
System.out.print("Enter new Carrier Name: ");
String newName = scanner.nextLine();
carrier.setName(newName);
System.out.print("Enter new Flight Capacity: ");
int newCapacity = scanner.nextInt();
System.out.print("Enter new Ticket Price: ");
double newTicketPrice = scanner.nextDouble();
scanner.nextLine(); // Consume newline
carrier.setCapacity(newCapacity);
carrier.setTicketPrice(newTicketPrice);
System.out.println("Carrier details updated successfully!");
} else {
System.out.println("Carrier with Id " + carrierId + " not found!");
}
}
// Remove carrier by CarrierId
private static void removeCarrier(Scanner scanner) {
System.out.print("Enter Carrier Id to remove: ");
String carrierId = scanner.nextLine();
if (carriers.remove(carrierId) != null) {
System.out.println("Carrier removed successfully!");
} else {
System.out.println("Carrier with Id " + carrierId + " not found!");
}
}
// Flight cancellation and refund calculation
private static void flightCancellation(Scanner scanner) {
System.out.print("Enter Carrier Id for flight cancellation: ");
String carrierId = scanner.nextLine();
if (carriers.containsKey(carrierId)) {
Carrier carrier = carriers.get(carrierId);
double refundAmount = carrier.getTicketPrice() * carrier.getCapacity() * 0.75; // 75% refund to customers
double lossAmount = carrier.getTicketPrice() * carrier.getCapacity() * 0.25; // 25% loss to carrier
System.out.println("Refund amount to customers: $" + refundAmount);
System.out.println("Loss to the carrier: $" + lossAmount);
} else {
System.out.println("Carrier with Id " + carrierId + " not found!");
}
}
// Customer registration
private static void customerRegistration(Scanner scanner) {
System.out.print("Enter Customer UserId: ");
String userId = scanner.nextLine();
System.out.print("Enter Customer Password: ");
String password = scanner.nextLine();
if (!customers.containsKey(userId)) {
customers.put(userId, new Customer(userId, password));
System.out.println("Customer registered successfully!");
} else {
System.out.println("User already exists!");
}
}
// Edit customer profile
private static void editCustomerProfile(Scanner scanner, String userId) {
Customer customer = customers.get(userId);
if (customer != null) {
System.out.print("Enter new Password: ");
String newPassword = scanner.nextLine();
customer.setPassword(newPassword);
System.out.println("Customer profile updated successfully!");
} else {
System.out.println("Customer not found!");
}
}
// Ticket booking and price calculation
private static void ticketBooking(Scanner scanner, String userId) {
System.out.print("Enter Carrier Id: ");
String carrierId = scanner.nextLine();
if (carriers.containsKey(carrierId)) {
Carrier carrier = carriers.get(carrierId);
System.out.print("Enter number of tickets: ");
int numOfTickets = scanner.nextInt();
scanner.nextLine(); // Consume newline
if (numOfTickets <= carrier.getCapacity()) {
double totalPrice = numOfTickets * carrier.getTicketPrice();
carrier.setCapacity(carrier.getCapacity() - numOfTickets);
System.out.println("Booking successful! Total cost: $" + totalPrice);
} else {
System.out.println("Not enough seats available!");
}
} else {
System.out.println("Carrier not found!");
}
}
// Ticket cancellation and refund calculation
private static void ticketCancellation(Scanner scanner, String userId) {
System.out.print("Enter Carrier Id for ticket cancellation: ");
String carrierId = scanner.nextLine();
if (carriers.containsKey(carrierId)) {
Carrier carrier = carriers.get(carrierId);
System.out.print("Enter number of tickets to cancel: ");
int numOfTickets = scanner.nextInt();
scanner.nextLine
