Question

I need this in java please Create an automobile class that will be used by a dealership as a vehicle inventory program. The following attributes should be present in your automobile class: private string make private string model private string color private int year private int mileage. Your program should have appropriate methods such as: default constructor parameterized constructor add a new vehicle method list vehicle information (return string array) remove a vehicle method update vehicle attributes method. All methods should include try..catch constructs. Except as noted all methods should return a success or failure message (failure message defined in “catch”). Create an additional class to call your automobile class (e.g., Main or AutomobileInventory). Include a try..catch construct and print it to the console any errors. Call automobile class with parameterized constructor (e.g., "make, model, color, year, mileage"). Then call the method to list the values. Loop through the array and print to the screen. Call the remove vehicle method to clear the variables. Print the return value. Add a new vehicle. Print the return value. Call the list method and print the new vehicle information to the screen. Update the vehicle. Print the return value. Call the listing method and print the information to the screen. Display a message asking if the user wants to print the information to a file (Y or N). Use a scanner to capture the response. If “Y”, print the file to a predefined location (e.g., C:\Temp\Autos.txt). Note: you may want to create a method to print the information in the main class. If “N”, indicate that a file will not be printed.

Any additional information and comments explaining more in depth would be appreciated. Thank you

Answer 1

import java.io.PrintWriter;
import java.util.Scanner; // Required for user input
import java.util.*;

public class Main { // Note that my automobile class is in another file 'Automobile.java'

    public static void main(String[] args) {

        Automobile car = new Automobile();
            car.setMake("");
            String make = car.getMake();

            car.setModel("");
            String model = car.getModel();

            car.setColor("");
            String color = car.getColor();

            car.setYear(0);
            Integer year = car.getYear();

            car.setMileage(0);
            Integer mileage = car.getMileage();

        int removeCar;
        int updateCar;

        Scanner input = new Scanner(System.in); // This allows the users to enter data
        ArrayList<String> carMake = new ArrayList<>();
        ArrayList<String> carModel = new ArrayList<>();
        ArrayList<String> carColor = new ArrayList<>();
        ArrayList<Integer> carYear = new ArrayList<>();
        ArrayList<Integer> carMileage = new ArrayList<>();

        do { // this is here so my menu loops after the users performs an action
            try {
                // User Menu
                System.out.println(""); // Just want some spacing for aesthetics
                System.out.println("-----------------------------------");
                System.out.println("What do you want to do? (Type 1-5)");
                System.out.println("-----------------------------------");
                System.out.println("1. Add new vehicle");
                System.out.println("2. Remove a vehicle");
                System.out.println("3. Update existing vehicle");
                System.out.println("4. View all vehicles");
                System.out.println("5. Print all data to text file");
                System.out.println("-----------------------------------");

                int menu = input.nextInt(); // Only allow numbers for simplicity

                if (menu == 1) {
                    System.out.println("Type the Make of the car you wish to enter:");
                    make = input.next();
                    carMake.add(make);

                    System.out.println("Type the Model of the car you wish to enter:");
                    model = input.next();
                    carModel.add(model);

                    System.out.println("Type the Color of the car you wish to enter:");
                    color = input.next();
                    carColor.add(color);

                    System.out.println("Type the Year of the car you wish to enter:");
                    year = input.nextInt();
                    carYear.add(year);

                    System.out.println("Type the Mileage of the car you wish to enter:");
                    mileage = input.nextInt();
                    carMileage.add(mileage);

                } else if (menu == 2) {
                    System.out.println("What car do you want to remove? (Type the number... IE: 0)");

                    // Give the user options
                    for (int i = 0; i < carMake.size() && i < carModel.size() && i < carColor.size() && i < carYear.size() && i < carMileage.size(); i++)
                        System.out.println(carMake.indexOf(carMake.get(i)) + ": " +carMake.get(i) + ", " + carModel.get(i) + ", " + carColor.get(i) + ", " + carYear.get(i) + ", " + carMileage.get(i) + ".");

                    // Remove the indexes for the car selected... It's important to remove them all because if you don't the remaining cars will be out of sync
                    removeCar = input.nextInt();
                    carMake.remove(removeCar);
                    carModel.remove(removeCar);
                    carColor.remove(removeCar);
                    carYear.remove(removeCar);
                    carMileage.remove(removeCar);

                } else if (menu == 3) {
                    System.out.println("What car do you want to update? (Type the number... IE: 0)");

                    for (int i = 0; i < carMake.size() && i < carModel.size() && i < carColor.size() && i < carYear.size() && i < carMileage.size(); i++)
                        System.out.println(carMake.indexOf(carMake.get(i)) + ": " +carMake.get(i) + ", " + carModel.get(i) + ", " + carColor.get(i) + ", " + carYear.get(i) + ", " + carMileage.get(i) + ".");

                    updateCar = input.nextInt();
                    System.out.println("Set the new Car Make:");
                    carMake.set(updateCar, input.next());
                    System.out.println("Set the new Car Model:");
                    carModel.set(updateCar, input.next());
                    System.out.println("Set the new Car Color:");
                    carColor.set(updateCar, input.next());
                    System.out.println("Set the new Car Year:");
                    carYear.set(updateCar, input.nextInt());
                    System.out.println("Set the new Car Mileage:");
                    carMileage.set(updateCar, input.nextInt());

                } else if (menu == 4) {
                    System.out.println("Here are all of the cars currently in the inventory:");
                    for (int i = 0; i < carMake.size() && i < carModel.size() && i < carColor.size() && i < carYear.size() && i < carMileage.size(); i++)
                        System.out.println(carMake.get(i) + ", " + carModel.get(i) + ", " + carColor.get(i) + ", " + carYear.get(i) + ", " + carMileage.get(i) + ".");

                } else if (menu == 5) {
                    System.out.println("Printing all data...");

                    PrintWriter writer = new PrintWriter("TravisWoodward_AutomobileProgram.txt", "UTF-8");
                    for (int i = 0; i < carMake.size() && i < carModel.size() && i < carColor.size() && i < carYear.size() && i < carMileage.size(); i++)
                        writer.println(carMake.get(i) + ", " + carModel.get(i) + ", " + carColor.get(i) + ", " + carYear.get(i) + ", " + carMileage.get(i) + ".");
                    writer.close();

                } else {
                    System.out.println("You must select a number between 1-5 (IE: 2).");
                }
            }
            catch (Exception e) {
                input.next(); // dont let users type strings where ints go!
                System.out.println("You may not put letters in that field. Please try again.\n");
            }
        }
        while (true);
    }
}

Automobile.java

public class Automobile {

    private String make;
    private String model;
    private String color;
    private int year;
    private int mileage;

    public void setMake(String make) {
        this.make = make;
    }

    public String getMake() {
        return make;
    }

    public void setModel(String model) {
        this.model = model;
    }

    public String getModel() {
        return this.model;
    }

    public void setColor(String color) {
        this.color = color;
    }

    public String getColor() {
        return this.color;
    }

    public void setYear(int year) {
        this.year = year;
    }

    public int getYear() {
        return this.year;
    }

    public void setMileage(int mileage) {
        this.mileage = mileage;
    }

    public int getMileage() {
        return this.mileage;
    }

    public static void main(String[] args){

        System.out.println("Please run the Main.java file...");

    }
}

Answer 2

Here's a possible implementation of the Automobile class in Java:

import java.io.FileWriter;

import java.io.IOException;

public class Automobile {

    private String make;

    private String model;

    private String color;

    private int year;

    private int mileage;

    public Automobile() {

        // default constructor

    }

    public Automobile(String make, String model, String color, int year, int mileage) {

        this.make = make;

        this.model = model;

        this.color = color;

        this.year = year;

        this.mileage = mileage;

    }

    public String[] getVehicleInformation() {

        String[] info = new String[5];

        info[0] = "Make: " + make;

        info[1] = "Model: " + model;

        info[2] = "Color: " + color;

        info[3] = "Year: " + year;

        info[4] = "Mileage: " + mileage;

        return info;

    }

    public boolean addNewVehicle(String make, String model, String color, int year, int mileage) {

        try {

            this.make = make;

            this.model = model;

            this.color = color;

            this.year = year;

            this.mileage = mileage;

            return true;

        } catch (Exception e) {

            System.out.println("Error adding new vehicle: " + e.getMessage());

            return false;

        }

    }

    public boolean removeVehicle() {

        try {

            make = null;

            model = null;

            color = null;

            year = 0;

            mileage = 0;

            return true;

        } catch (Exception e) {

            System.out.println("Error removing vehicle: " + e.getMessage());

            return false;

        }

    }

    public boolean updateVehicleAttributes(String make, String model, String color, int year, int mileage) {

        try {

            if (make != null) {

                this.make = make;

            }

            if (model != null) {

                this.model = model;

            }

            if (color != null) {

                this.color = color;

            }

            if (year > 0) {

                this.year = year;

            }

            if (mileage > 0) {

                this.mileage = mileage;

            }

            return true;

        } catch (Exception e) {

            System.out.println("Error updating vehicle attributes: " + e.getMessage());

            return false;

        }

    }

    public boolean printToFile(String filePath) {

        try {

            FileWriter writer = new FileWriter(filePath);

            String[] info = getVehicleInformation();

            for (String s : info) {

                writer.write(s + "\n");

            }

            writer.close();

            return true;

        } catch (IOException e) {

            System.out.println("Error printing vehicle information to file: " + e.getMessage());

            return false;

        }

    }

}

And here's an example usage of the class in a main method:

import java.util.Scanner;

public class AutomobileInventory {

    public static void main(String[] args) {

        Automobile vehicle = new Automobile("Honda", "Civic", "Blue", 2015, 50000);

        String[] info = vehicle.getVehicleInformation();

        for (String s : info) {

            System.out.println(s);

        }

        vehicle.removeVehicle();

        System.out.println(vehicle.removeVehicle() ? "Vehicle removed." : "Error removing vehicle.");

        System.out.println(vehicle.addNewVehicle("Toyota", "Corolla", "Red", 2020, 10000) ? "Vehicle added." : "Error adding new vehicle.");

        info = vehicle.getVehicleInformation();