TaxiCustomer.java

import java.util.Scanner;

public class TaxiCustomer {
	private static Scanner sc = new Scanner(System.in);
	private static float surchargeRate = 5.0f, distance, charge, amount;
	private static int choice;
	public String username;
	private String password;
	private float balance;
	TaxiCustomer(String username) {
		this.username = username;
	}
	void setPassword(String password) {
		this.password = password;
	}
	String getPassword() {
		return password;
	}
	void setBalance(float balance) {
		this.balance = balance;
	}
	void displayUserMenu() {
		System.out.println("\n-------------------------USER MENU-------------------------\n");
		System.out.println("Welcome, "+username+"!");
		System.out.println("1 - Check your account balance\t2 - Deposit money in your account");
		System.out.println("3 - Book a ride\t\t\t4 - Logout");
		System.out.println("Enter your choice:");
		choice = sc.nextInt();
		sc.nextLine();
		switch(choice) {
		case 1:	checkBalance();
				break;
		case 2: depositAmount();
				break;
		case 3: bookARide();
				break;
		case 4:	System.out.println("Logging out....");
				break;
		default: System.out.println("Invalid choice. Try again.");
				displayUserMenu();
				break;
		}
	}
	void checkBalance() {
		System.out.format("Your current balance is Rs. %.2f\n", balance);
		displayUserMenu();
	}
	void depositAmount() {
		System.out.println("Enter amount to be deposited:");
		amount = sc.nextFloat();
		sc.nextLine();
		balance += amount;
		System.out.format("Your new balance is Rs. %.2f\n", balance);
		displayUserMenu();
	}
	void calcCharge() {
		if(distance <= 5.0f) {
			charge = 25.0f * distance;
		} else {
			charge = 125.0f + (distance - 5.0f) * 35.0f;
		}
		charge += (surchargeRate / 100.0f) * charge;
	}
	void bookARide() {
		System.out.println("Thank you for choosing Generic Taxi Service Company.");
		System.out.println("Enter the distance to travel in kms:");
		distance = sc.nextFloat();
		sc.nextLine();
		calcCharge();
		System.out.format("The charge for your ride including surcharge of %.1f%% is Rs. %.2f\n", surchargeRate, charge);
		if (charge > balance) {
			System.out.println("This ride cannot be booked as you have insufficient account balance.");
			checkBalance();
		}
		balance -= charge;
		System.out.println("Ride successfully booked.");
		checkBalance();
	}
}

class MainClassTaxi {
	public static void main(String[] args) {
		Scanner sc2 = new Scanner(System.in);
		int i, userChoice = 0;
		String username, password;
		
		TaxiCustomer[] userList = new TaxiCustomer[3];
		userList[0] = new TaxiCustomer("Ramesh025");
		userList[0].setBalance(1000.0f);
		userList[0].setPassword("ramesh123");
		userList[1] = new TaxiCustomer("Prakash197");
		userList[1].setBalance(2000.0f);
		userList[1].setPassword("prakash345");
		userList[2] = new TaxiCustomer("Robert260");
		userList[2].setBalance(3000.0f);
		userList[2].setPassword("robert567");
		
		do {
			System.out.println("\n-------------------------MAIN MENU-------------------------\n");
			System.out.println("1 - Login to your account\t0 - Exit the program");
			System.out.println("Enter your choice:");
			userChoice = sc2.nextInt();
			sc2.nextLine();
			switch(userChoice) {
			case 0:	System.out.println("Exiting program...");
					break;
			case 1:	System.out.println("Enter username:");
					username = sc2.nextLine();
					for(i = 0; i < userList.length; i++) {
						if ( !(username.equals(userList[i].username)) ) continue;
						System.out.println("Enter password:");
						password = sc2.nextLine();
						if( !(password.equals(userList[i].getPassword())) ) {
							System.out.println("Incorrect password.");
							break;
						}
						userList[i].displayUserMenu();
						break;
					}
					if(i == userList.length) {
						System.out.println("No such user exists.");
					}
					break;
			default: System.out.println("Invalid choice. Try again.");
					break;
			}
		} while(userChoice != 0);
		sc2.close();
	}
}