Implement a class Quiz that implements the Measurable interface. A quiz has a score and a letter grade (such as B+). Use the Data class of Exercise E10.1 to process an array of quizzes. Display the average score and the quiz with the highest score (both letter grade and score)--------- This is what my project is on. Right now most of it is done.

WHAT I NEED TO DO:

I need to get the average to work in the tester/runner class.

I cant figure out how to show the max with the correct grade letter

I am not allowed to use a rounder. I need to put .2%f in there somewhere I dont know where though

package measurable;

import java.text.DecimalFormat;

/*Implement a class Quiz that implements the Measurable interface. A quiz has a score

and a letter grade (such as B+). Use the Data class of Exercise E10.1 to process an array

of quizzes. Display the average score and the quiz with the highest score (both letter

grade and score).*/

public class Data

{

public static double average(Measurable[] objects)

{

double sum = 0;

for(Measurable obj : objects)

{

sum = sum + obj.getMeasure();

}

if(objects.length > 0)

{

return sum / objects.length;

}

else

{

return 0;

}

}

public static Measurable max(Measurable[] objects)

{

if(objects.length == 0)

{

return null;

}

else

{

Measurable max = objects [0];

for(Measurable score : objects)

{

if(max.getMeasure() > score.getMeasure())

{

score = max;

}

}

return max;

}

}

}

package measurable;

public class Quiz implements Measurable

{

private static String letterGrade;

private static double score;

public Quiz(double score, String letterGrade)

{

Quiz.score = score;

Quiz.letterGrade = letterGrade;

}

public double getMeasure()

{

return score;

}

public double getScore()

{

return score;

}

public String getLetterGrade()

{

return letterGrade;

}

public static String getLetterGrade(Measurable[] quizzes)

{

if(score >= 98)

{

letterGrade = "A+";

}

if(score >= 94 && score < 98)

{

letterGrade = "A";

}

if(score >= 90 && score < 94)

{

letterGrade = "A-";

}

if(score >= 88 && score < 90)

{

letterGrade = "B+";

}

if(score >= 84 && score < 88)

{

letterGrade = "B";

}

if(score >= 80 && score < 84)

{

letterGrade = "B-";

}

if(score >= 78 && score < 80)

{

letterGrade = "C+";

}

if(score >= 74 && score < 78)

{

letterGrade = "C";

}

if(score >= 70 && score < 74)

{

letterGrade = "C-";

}

if(score >= 68 && score < 70)

{

letterGrade = "D+";

}

if(score >= 64 && score < 68)

{

letterGrade = "D";

}

if(score >= 60 && score < 64)

{

letterGrade = "D-";

}

if(score < 60)

{

letterGrade = "F";

}

return letterGrade;

}

}

package measurable;

import java.text.*;

public class QuizRunner

{

public static void main(String args[])

{

//arraylist of quizzes with each having a score and letter grade

Measurable[] quizzes = new Measurable [6];

quizzes[0] = new Quiz(67, "D+");

quizzes[1] = new Quiz(75, "C");

quizzes[2] = new Quiz(80, "B-");

quizzes[3] = new Quiz(90, "A-");

quizzes[4] = new Quiz(95, "A");

quizzes[5] = new Quiz(72, "C-");

System.out.println("Average score is " + Data.average(quizzes) + " which is an average letter grade of a(n) " + Quiz.getLetterGrade(quizzes) + ".");

System.out.printf("The highest score is " + Data.max(quizzes) + " which is a(n) " + Quiz.getLetterGrade(quizzes) + ".");

//cast in notes for Data.max(quizzes)

}

}

package measurable;

public interface Measurable

{

double getMeasure();

}