Writing Classes Syntax

Assume that we want to have a class to store data and actions relating to a robot. For this assignment, you get to do just the very first step. Just write code to create the class (you can leave the entire body of the class blank :). Name the class Robot (and therefore, save it in a file named Robot.java). Submit your Robot.java to the "Writing Classes Syntax" assignment on codePost.
Note, do not include a constructor with parameters.

Book Class

Write a class to store data and actions relating to a book. For now, just model a book by it's title, author and number of pages. Create three (private) fields in your class to store this information. Name the class Book. Additionally, provide the following methods:

• String getTitle(): returns the title of the book
• void setTitle(String title): sets the book title to title
• String getAuthor(): returns the author of the book
• void setAuthor(String author): sets the author of the book to author
• int getPages(): returns the number of pages of the book
• void setPages(int pages): sets the number of pages of the book to pages

Hints

1. If you see an error in codePost about "cannot find symbol", means it can’t find something. For example:

   codePost Test] setters Test:17: error: cannot find symbol
   littleEngineObj.setTitle("The Little Engine That Could");
                  ^
   symbol:   method setTitle(String)
   location: variable littleEngineObj of type Book

   In this case, it cannot find the "setTitle" method in the Book class that was submitted. If you have a method with all lowercase letters (i.e., settitle), that is a different method than setTitle and is the reason for the "cannot find symbol" compilation error.

CarForSale Class

Write a CarForSale class so that the CarForSaleDriver class compiles and executes as illustrated in the examples. Do not modify the CarForSaleDriver class. Upload just your CarForSale.java file to codePost.

import java.util.Scanner;

/**
 * Driver code for the CarForSale class
 * @author Hyrum D. Carroll
 * @version 0.2 (March 21, 2022)
 */
public class CarForSaleDriver{

    public static void main( String[] args ){

        // Prompt the user for the model, asking price and year for two different vehicles
        Scanner stdin = new Scanner( System.in );

        // local variables to hold input from the user for each of the two vehicles
        String modelFromUser = "";
        double priceFromUser = 0.0;
        int yearFromUser = 0;

        System.out.print( "Please enter the model of the first vehicle: ");
        modelFromUser = stdin.next();
        System.out.println( "You entered " + modelFromUser);

        System.out.print( "Please enter the asking price for the " + modelFromUser + ": ");
        priceFromUser = stdin.nextDouble();
        System.out.println( "You entered " + priceFromUser);

        System.out.print( "Please enter the year of the " + modelFromUser + ": ");
        yearFromUser = stdin.nextInt();
        System.out.println( "You entered " + yearFromUser);

        // first vehicle
        CarForSale carA = new CarForSale( modelFromUser, priceFromUser, yearFromUser);

        // second vehicle
        CarForSale carB = new CarForSale();

        System.out.print( "Please enter the model of the second vehicle: ");
        modelFromUser = stdin.next();
        System.out.println( "You entered " + modelFromUser);
        carB.setModel( modelFromUser );

        System.out.print( "Please enter the asking price for the " + carB.getModel() + ": ");
        priceFromUser = stdin.nextDouble();
        System.out.println( "You entered " + priceFromUser);
        carB.setPrice( priceFromUser );

        System.out.print( "Please enter the year of the " + carB.getModel() + ": ");
        yearFromUser = stdin.nextInt();
        System.out.println( "You entered " + yearFromUser);
        carB.setYear( yearFromUser );

        System.out.println();


        // Display the car to by based on the asking price then the year  
        boolean decided = false;

        if( carA.getPrice() < carB.getPrice() ){
            System.out.println( "The " + carA.getModel() + " has a lower asking price" );

            if( carA.getYear() >= carB.getYear() ){
                System.out.println( "The " + carA.getModel() + " is also newer" );
                System.out.println( "I'm going to go with the " + carA.toString() );
                decided = true;
            }
        }else{
            System.out.println( "The " + carB.getModel() + " has a lower asking price" );

            if( carB.getYear() >= carA.getYear() ){
                System.out.println( "The " + carB.getModel() + " is also newer" );
                System.out.println( "I'm going to go with the " + carB.toString() );
                decided = true;
            }
        }

        // Neither vehicle is an obvious choice, so display both of them
        if( ! decided ){
            System.out.println("I can't decided between the following cars:");
            System.out.println( carA.toString() );
            System.out.println( carB.toString() );
        }
    }
}

Example 1

Please enter the model of the first vehicle: Avalon
You entered Avalon
Please enter the asking price for the Avalon: 4995.0
You entered 4995.0
Please enter the year of the Avalon: 2006
You entered 2006
Please enter the model of the second vehicle: xB
You entered xB
Please enter the asking price for the xB: 4495.0
You entered 4495.0
Please enter the year of the xB: 2005
You entered 2005

The xB has a lower asking price
I can't decided between the following cars:
2006 Avalon with an asking price of $4995.0
2005 xB with an asking price of $4495.0

Example 2

Please enter the model of the first vehicle: Transit
You entered Transit
Please enter the asking price for the Transit: 31950.5
You entered 31950.5
Please enter the year of the Transit: 2018
You entered 2018
Please enter the model of the second vehicle: Express
You entered Express
Please enter the asking price for the Express: 29999.99
You entered 29999.99
Please enter the year of the Express: 2018
You entered 2018

The Express has a lower asking price
The Express is also newer
	  I'm going to go with the 2018 Express with an asking price of $29999.99

Hints

1. If you're getting an error like, the following:

   CarForSaleDriver.java:70: error: constructor CarForSale in class CarForSale cannot be applied to given types;
           CarForSale carB = new CarForSale();
                             ^
     required: String,double,int
     found: no arguments
     reason: actual and formal argument lists differ in length
   1 error

   Here, "required: String,double,int" means that the submitted code (your code) has a method (in this case the constructor) that requires 3 arguments (i.e., a String, a double and int), but only a constructor with "no arguments" was "found" in your code. Notice, that the CarForSaleDriver code requires both a constructor with 3 arguments and a constructor without any arguments.
2. If you seeing something like the following in your output:

   CarForSale@33909752

   This is the result of calling the toString method, which is then passed to the println method. You need to write a method named toString that returns a String that matches the pattern in the examples.