Chapter 5, Problem 10E

Explanation of Solution

a.

Method heading for each method:

• Method heading for project rating is “public void rateProject()”.
• Method heading for total rating is “public int totalRating()”...

Explanation of Solution

b.

Preconditions and postconditions of each method:

• Precondition and postcondition of “public void rateProject()” method.
  • Precondition: None.
  • Postcondition: Ratings were attained from user for each category and then assign it to the variable.
• Precondition and postcondition of “totalRating()” method.
  • Precondition: None.
  • Postcondition: This method returns total rating for each category...

Explanation of Solution

c.

Java statement for testing the class:

//Create an object for "ScienceFairProjectRating" class

ScienceFairProjectRating joesProject = new ScienceFairProjectRating();

ScienceFairProjectRating suesProject = new ScienceFairProjectRating();

//Call "initialize()" method to initialize the variables

joesProject.initialize("Weather and You", "U1256", "Joe Minnow");

suesProject...

Explanation of Solution

d.

Implementation of class:

ScienceFairProjectRating.java:

//Import the java package

import java.util.Scanner;

//Define the class

public class ScienceFairProjectRating

{

    //Declare the required variables

    private String projectName;

    private String identifier;

    private String submitter;

    //Create an object for "RatingScore" class

    private RatingScore creativeRating;

    private RatingScore thoughtRating;

    private RatingScore thoroughnessRating;

    private RatingScore technicalRating;

    private RatingScore clarityRating;

    //Define the "initialize()" method

public void initialize(String name, String id, String person)

    {

        //Initialize the required variables

        projectName = name;

        identifier = id;

        submitter = person;

        creativeRating = new RatingScore();

        thoughtRating = new RatingScore();

        thoroughnessRating = new RatingScore();

        technicalRating = new RatingScore();

        clarityRating = new RatingScore();

creativeRating.initialize("How creative was this project", 30);

thoughtRating.initialize("Was scientific thought displayed in the project", 30);

thoroughnessRating.initialize("Did the project cover the material thoroughly", 15);

technicalRating.initialize("Were appropriate technical skill displayed", 15);

clarityRating.initialize("Was the presentation of the project clear", 10);

    }

    //Define the "rateProject()" method

    public void rateProject()

    {

        //Display the message to get the rating

System.out.println("Please enter ratings for the project " + projectName + "(" + identifier + ")");

/*Call "inputRating()" method using objects of RatingScore class. */

        creativeRating.inputRating();

        thoughtRating.inputRating();

        thoroughnessRating.inputRating();

        technicalRating.inputRating();

        clarityRating.inputRating();

    }

    //Define the "totalRating()" method

    public int totalRating()

    {

        //Calculate the total rating and then return it

return creativeRating.getRating() + thoughtRating.getRating() + thoroughnessRating.getRating() + technicalRating.getRating() + clarityRating.getRating();

    }

    //Define the "maxRating()" method

    public int maxRating()

    {

        //Calculate the maximum rating and then return it

return creativeRating.getMaxRating() + thoughtRating.getMaxRating() + thoroughnessRating.getMaxRating() + technicalRating.getMaxRating() + clarityRating.getMaxRating();

    }

    //Define the "getRatingString()" method

    public String getRatingString()

    {

        //Calculate the project rating and then return it

return "Project " + projectName + "(" + identifier + ") by " + submitter + " was given the score "

        + totalRating() + "/" + maxRating();

    }

    //Define the "main()" method

    public static void main(String[] args)

    {

/*Create an object for "ScienceFairProjectRating" class. */

ScienceFairProjectRating joesProject = new ScienceFairProjectRating();

ScienceFairProjectRating suesProject = new ScienceFairProjectRating();

/*Call initialize() method to initialize the variables. */

joesProject.initialize("Weather and You", "U1256", "Joe Minnow");

suesProject.initialize("Hot Air", "U1275", "Susan Shark");

        //Call "ratePorject()" to rate the project

        joesProject.rateProject();

        suesProject.rateProject();

        System.out.println("Judging is completed: ");

/*Call "getRatingString()" method to get the project rating. */

        System.out.println(joesProject.getRatingString());

        System.out.println(suesProject.getRatingString());

    }

}

RatingScore.java:

//Import the java package

import java.util.Scanner;

//Define the class

public class RatingScore

{

    //Declare the required variables

    private String description;

    private int maximumRating;

    private int theRating;

    //Define the "initialize()" method

    public void initialize(String desc, int max)

    {

        //Initialize the required variables

        description = desc;

        maximumRating = max;

        theRating = -1;

    }

    //Define "inputRating()" method

    public void inputRating()

    {

        //Read the maximum rating value from user

System...