RayaanRentACar

import java.util.*;
class Rayaan_Rent_A_Car{
    public static void main(){
        System.out.print("\f"); //Clearing the screen
        boolean flag = false, flag2 = true, flag3 = false;int zzz = 1; int mainmenu = 1;
        Scanner sc = new Scanner(System.in); //Initializing Scanner class
        System.out.println("------------------------------------------------------------------------------------------------------------------------------------------------------------------");
        System.out.println("Welcome to Chicken Rent A Car");
        System.out.println("------------------------------------------------------------------------------------------------------------------------------------------------------------------");
        String usernames[] = {"Rayaan", "Ali", "Ben"}; //Array for stroing usernames
        String passwords[] = {"chicken", "cat", "ball"}; //Array for storing passwords
        System.out.print("Username: ");
        String username = sc.next(); //Entered username by user
        System.out.print("Password: ");
        String password = sc.next(); //Entered password by user
        String carModel[] = {"Toyota Corolla", "Toyota Yaris", "Toyota Fortuner", "Toyota Land Cruiser", "Nissan Tiida",
                "Nissan Patrol", "Ford Explorer", "Ford Focus", "Mitsubishi Lancer", "Mitsubishi Pajero", "GMC Yukon XL"}; //Names of cars
        int costPerDay[] = {50, 45, 100, 200, 50, 200, 100, 75, 50, 100, 250}; //Rental cost per day
        for(int i = 0; i < 3; i++){ //For loop for index number of arrays
            if (username.equalsIgnoreCase(usernames[i]) && password.equals(passwords[i])){ //Verifying username and password match
                System.out.println("\f"+"Welcome, " + usernames[i] +"\n"); //Welcoming users, \f for clearing the screen
                System.out.println("Select an option:");
                System.out.println("1. Display the details of the car arranged in the descending order of rent");
                System.out.println("2. Search for a specific model and display the details");
                System.out.println("3. Rent a Car");
                System.out.println("4. Display the details of the cars that have been rented, arranged in the descending order of number of days for rent");
                System.out.println("5. Exit");
                int choice = sc.nextInt(); //Variable for storing user's choice
                switch(choice){
                    case 1:
                    System.out.print("\f");
                    for(int x = 0; x < costPerDay.length-1; x++){ //Sort the Cost Per Day Array in descending order using bubble sort
                        for(int j = x + 1; j < costPerDay.length; j++){
                            if(costPerDay[x] < costPerDay[j]){
                                int t = costPerDay[x];
                                String s = carModel[x];
                                costPerDay[x] = costPerDay[j];
                                costPerDay[j] = t;
                                carModel[x] = carModel[j];
                                carModel[j] = s;
                            }
                        }
                    }
                    for(int z = 0; z < carModel.length; z++){
                        System.out.println(carModel[z] + " - " + costPerDay[z] );
                    }
                    System.out.println("Press 1 to return to the main menu");
                    mainmenu = sc.nextInt();
                    break;
                    //End of case 1//
                    case 2:
                    System.out.print("\f");
                    String space = sc.nextLine();
                    System.out.println("Enter the name of the car");
                    String enteredName = sc.nextLine();
                    for(int c = 0; c < carModel.length; c++){
                        if (carModel[c].equalsIgnoreCase(enteredName)){
                            flag3 = true;
                            System.out.print("\f");
                            System.out.println("Car name: " + carModel[c]);
                            System.out.println("Cost per day: " + costPerDay[c]);
                            break;
                        }
                    }
                    if(!flag3){
                        System.out.println("Not Found!");
                    }
                    break;
                    //End of case 2//
                    case 3:
                    System.out.print("\f");
                    sc.nextLine();
                    boolean name_flag = false;
                    String customerName;
                    int daysRented;
                    boolean daysRented_flag = false;
                    String model;
                    boolean model_flag = false;
                    do{
                        System.out.print("Customer Name: ");
                        customerName = sc.nextLine().toUpperCase();
                        for(int checkr = 0; checkr < customerName.length(); checkr++){
                            char case3i = customerName.charAt(checkr);
                            if(case3i >= 'A' && case3i <= 'Z' || case3i == ' '){
                                name_flag = true;
                            }else{
                                System.out.println("Name can only contain letters! Try Again");
                                name_flag = false;
                                break;
                            }
                        }
                    }while(!name_flag);
                    do{
                        System.out.print("Number of Days Rented: ");
                        daysRented = sc.nextInt();
                        sc.nextLine();
                        if(daysRented > 0){
                            daysRented_flag = true;
                        }else{
                            System.out.println("Has to be more than zero! Try Again");
                        }
                    }while(!daysRented_flag);
                    do{
                        System.out.print("Car Model: ");
                        model = sc.nextLine();
                        for(int f = 0; f < carModel.length; f++){
                            if (model.equalsIgnoreCase(carModel[f])){
                                model_flag = true;
                                zzz = f;
                                break;
                            }else{
                                System.out.println("Not found! Try again");
                                model_flag = false;
                                break;
                            }
                        }
                    }while(!model_flag);
                    System.out.print("Date: ");
                    String date = sc.nextLine();
                    System.out.println("");
                    System.out.print("\f");
                    System.out.println("------------------------------------------------------------------------------------------------------------------------------------------------------------------");
                    System.out.println("Chicken Rent A Car");
                    System.out.println("------------------------------------------------------------------------------------------------------------------------------------------------------------------");
                    System.out.println("Customer name: " + customerName);
                    System.out.println("Date: " + date);
                    System.out.println("Car Model: " + carModel[zzz]);
                    System.out.println("Rent Per Day: " + costPerDay[zzz]);
                    System.out.println("Number of Days Rented: " + daysRented);
                    System.out.println("Total Cost: " + costPerDay[zzz]*daysRented);
                    System.out.println("------------------------------------------------------------------------------------------------------------------------------------------------------------------");
                    break;
                    //End of case 3//
                    case 4:


                    break;
                    case 5:
                    System.exit(0);
                }
                flag = true; flag2 = false;
                if(mainmenu == 1)
                    continue;
                break;
            }else if(username.equalsIgnoreCase(usernames[i]) && !password.equals(passwords[i])){
                System.out.println("Invalid Password!");
                flag2 = false;
                break;
            }else if(!username.equalsIgnoreCase(usernames[i]) && password.equals(passwords[i])){
                System.out.println("Invalid Username!");
                flag2 = false;
                break;
            }
        }
        if(flag2 == true){
            System.out.println("Invalid Username and Password!");
        }
        if(flag == false){
            System.out.println("Do you want to try again? 1 for yes and 0 for no");
            int restart = sc.nextInt();
            if (restart == 1){
                main();
            }else{
                System.exit(0);
            }
        }
    }
}