import java.io.*;
import java.util.ArrayList;
import java.util.*;

public class Showroom
{
    char[] in = new char[50];
    ArrayList <Vehicle> showRoom;
    int current = 0;
    int theSize;
    File carFile = new File("carFile.txt");

    public Showroom()
    {
        showRoom = new ArrayList<Vehicle>();
    }

    public void addVehicle(Vehicle cars)
    {
        showRoom.add(cars);
    }

    public void addNewVehicle(Vehicle cars)
    {
        current += 1;
        showRoom.add(current, cars);
    }

    public Vehicle findVehicle(String vin)
    {
        for (Vehicle c: showRoom)
        {
            if(c.getVIN().equalsIgnoreCase(vin))
                return displayVehicle(c);
        }
        System.out.println("Error: Car not found");
        return null;
    }

    public Vehicle displayVehicle(Vehicle car)
    {
        System.out.println("" + car.toString());
        return car;
    }

    public Vehicle displayVehicles()
    {
        for(Vehicle c: showRoom)
        {
            System.out.println( c.toString() + "\n");
        }
        return null;
    }

    public Vehicle displayCurrentVehicle()
    {

        System.out.println("" + showRoom.get(current).toString());
        return showRoom.get(current);
    }

    public Vehicle displayPreviousVehicle()
    {
        if(current <= 0)
        {
            System.out.println("Error: No Previous vehicles exist!\n");
            return null;
        }
        else
        {
            current -= 1;
            System.out.println("Previous Vehicle: " + showRoom.get(current));
            return showRoom.get(current);
        }
    }

    public Vehicle displayNextVehicle()
    {
        if(current >= showRoom.size() -1)
        {
            System.out.println("Error: No newer vehicles exist!\n");
            return null;
        }
        else
        {
            current += 1;
            System.out.println("Next Vehicle: " + showRoom.get(current));
            return showRoom.get(current);
        }
    }

    public void saveVehicle(){


            try{
                FileWriter fw = new FileWriter(carFile);
                fw.append(showRoom.get(current).getManufacturer() + " ");
                fw.append(showRoom.get(current).getModel() + " ");
                fw.append(showRoom.get(current).getVIN() + " ");
                fw.append(showRoom.get(current).getDOM() + " ");
                fw.append(showRoom.get(current).getTaxBand() + " ");
                fw.append(showRoom.get(current).getVCost() + " ");
                fw.flush();
                fw.close();
            }
            catch(IOException e){

            }

    }
    public void loadVehicle(){
        try{
            Scanner input = new Scanner(new File("carFile.txt"));
            String temp1 = input.next();
            String temp2 = input.next();
            String temp3 = input.next();
            String temp4 = input.next();
            String temp5= input.next();
            int temp6 = input.nextInt();
            Vehicle s = new Vehicle(temp1, temp2, temp3, temp4, temp5, temp6);
            showRoom.add(s);
            System.out.print(s.toString());

        }
        catch(IOException e){

        }
    }

    public String toString()
    {
     return "";
    }
}

import java.util.*;
import java.io.Serializable;
public class Vehicle implements Serializable {
    String manufacturer;
    String model;
    String customerName;
    String VIN;
    String dateOfManufacture;
    String dateOfSale = null;
    boolean sold = false;
    String taxBand;
    int vehicleCost;

    public Vehicle(String vManufacturer, String vModel, String vVIN, String vDOM,
            String vTaxBand, int vCost )
    {
        manufacturer = vManufacturer;
        model = vModel;
        VIN = vVIN;
        dateOfManufacture = vDOM;
        taxBand = vTaxBand;
        vehicleCost = vCost;
    }

    public Vehicle(String vManufacturer, String vModel, String vVIN, String vDOM)
    {
        manufacturer = vManufacturer;
        model = vModel;
        VIN = vVIN;
        dateOfManufacture = vDOM;
    }

    public String getManufacturer()
    {
        return manufacturer;
    }

    public String getModel()
    {
        return model;
    }

    public String getVIN()
    {
        return VIN;
    }

    public String getDOM()
    {
        return dateOfManufacture;
    }

    public boolean getSold()
    {
        return sold;
    }

    public String getTaxBand()
    {
        return taxBand;
    }

    public int getVCost()
    {
        return vehicleCost;
    }

    public void setSold()
    {
        sold = true;
    }

    public void setTaxBand(String a)
    {
        taxBand = a;
    }

    public void setVcost(int cost)
    {
        vehicleCost = cost;
    }

    public void buyVehicle(String date, String CustomerName, String tax, int cost)
    {
        dateOfSale = date;
        customerName = CustomerName;
        setVcost(cost);
        setTaxBand(tax);
        sold = true;
    }

    public String c02(char tBand)
    {
        char select = tBand;


            switch(select)
            {

                case 'a':
                case 'A':
                {
                   return "A(0 - 100)".toString();
                }


                case 'b':
                case 'B':
                {
                    return "B(101 - 110)".toString();
                }

                case 'c':
                case 'C':
                {
                    return "C(111 - 120)".toString();
                }

                case 'd':
                case 'D':
                {
                    return "D(121 - 130)".toString();
                }

                case 'e':
                case 'E':
                {
                    return "E(131 - 140)".toString();
                }

                case 'f':
                case 'F':
                {
                    return "F(141 - 150)".toString();
                }

                case 'g':
                case 'G':
                {
                    return "G(151 - 160)".toString();
                }

                default:

        }

            return "Tax band Not Found".toString();

    }

    public String toString()
    {
        String vman = "\tVehicle Manufacturer: " + getManufacturer() + "\n";
        String vmod = "\tVehicle Model: " + getModel() + "\n";
        String vvin = "\tVehicle Identification Number: " + getVIN() + "\n";
        String vdom = "\tVehicle Date of Manufacture: " + getDOM() + "\n";
        String vcost = "\tVehicle Cost: £" + getVCost() + "\n";
        String vsol = "\tVehicle sold: " + getSold() + "\n";
        String vtband = "\tVehicle Tax Band: " + c02(getTaxBand().charAt(0)) + "\n";
        return "Vehicle Details: \n" + vman + vmod + vvin + vdom + vcost + vsol + vtband;
    }

}




public class vehicle_driver
{
    public static void main(String[] args)
    {
        Showroom cars = new Showroom();

        Vehicle car1 = new Vehicle("Vauxhall", "Corsa", "p363af345", "12-Jan-04", "A", 6999);
        Vehicle car2 = new Vehicle("Vauxhall", "Astra", "tu48225xf", "16-Feb-09", "C", 12999);
        Vehicle car3 = new Vehicle("Vauxhall", "Insignia", "fcx35455v", "12-Jul-11", "B", 18999);

        cars.addVehicle(car1);
        cars.addVehicle(car2);
        cars.addVehicle(car3);

        //cars.findVehicle("p363af345");

        cars.displayCurrentVehicle();
        cars.displayPreviousVehicle();
        cars.displayNextVehicle();
        cars.displayNextVehicle();
        cars.displayNextVehicle();
        cars.displayCurrentVehicle();
        cars.displayPreviousVehicle();

        Vehicle car4 = new Vehicle("Vauxhall", "Monaro", "m0xx3259a", "26-Mar-07", "F", 22999);

        cars.addNewVehicle(car4);

        cars.displayVehicles();

        car4.setSold();
        car3.setSold();
        car2.setSold();
        car1.setSold();

        cars.displayVehicles();

        car1.buyVehicle("10-Sep-11", "C M", "F", 6999);
        car2.buyVehicle("16-Mar-11", "C M", "C", 12999);
        car3.buyVehicle("03-Oct-11", "C M", "B", 18999);

        cars.displayVehicles();

        //System.out.println(car1.toString());
        //System.out.println(car2.toString());
        //System.out.println(car3.toString());

        cars.saveVehicle();
        cars.loadVehicle();

        cars.displayVehicles();

        System.out.println("Total Cars: " + cars.showRoom.size());

    }
}