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Added Exercise 5
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‎Java Programming Principles 2/Homework/1. Unit One/Programming Exercise 5/src/ExerciseFive/CourseGrades.java

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package ExerciseFive;
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/**
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The CourseGrades class stores data about a course's
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graded activities for the Course Grades programming
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challenge.
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*/
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public class CourseGrades
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{
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public final int NUM_GRADES = 4;
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private GradedActivity[] grades;
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/**
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Constructor
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*/
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public CourseGrades()
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{
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grades = new GradedActivity[NUM_GRADES];
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}
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/**
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The setLab method stores a GradedActivity object
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for the lab grade.
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@param aLab Represents the lab grade.
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*/
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public void setLab(GradedActivity aLab)
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{
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grades[0] = aLab;
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}
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/**
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The setPassFailExam method stores a PassFailExam object
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for the pass/fail exam grade.
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@param aPassFailExam Represents the pass/fail exam grade.
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*/
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public void setPassFailExam(PassFailExam aPassFailExam)
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{
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grades[1] = aPassFailExam;
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}
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/**
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The setEssay method stores an Essay object
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for the essay grade.
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@param anEssay Represents the essay grade.
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*/
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public void setEssay(Essay anEssay)
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{
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grades[2] = anEssay;
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}
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/**
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The setFinalExam method stores a FinalExam object
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for the final exam grade.
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@param aFinalExam Represents the final exam grade.
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*/
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public void setFinalExam(FinalExam aFinalExam)
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{
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grades[3] = aFinalExam;
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}
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/**
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The toString method returns a string representation
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of the object.
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@return A string representation of the object.
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*/
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public String toString()
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{
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String str = "Lab Score: " + grades[0].getScore() +
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"\tGrade: " + grades[0].getGrade() +
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"\nPass/Fail Exam Score: " + grades[1].getScore() +
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"\tGrade: " + grades[1].getGrade() +
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"\nEssay Score: " + grades[2].getScore() +
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"\tGrade: " + grades[2].getGrade() +
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"\nFinal Exam Score: " + grades[3].getScore() +
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"\tGrade: " + grades[3].getGrade();
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return str;
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}
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}

‎Java Programming Principles 2/Homework/1. Unit One/Programming Exercise 5/src/ExerciseFive/Essay.java

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package ExerciseFive;
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import ExerciseFive.GradedActivity;
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/**
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The Essay class stores data about a graded
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activity that is an essay for the Course
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Grades programming challenge.
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*/
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public class Essay extends GradedActivity
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{
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private double grammar; // Points for grammar
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private double spelling; // Points for spelling
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private double correctLength; // Points for length
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private double content; // Points for content
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/**
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The setScore method sets points for grammar,
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spelling, length, and content.
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This method overloads the base class method.
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Note that the other "set" methods are
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private. Those methods are for validating
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points before they are assigned.
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@param gr Grammar points.
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@param sp Spelling points.
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@param len Length points.
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@param cnt Content points.
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*/
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public void setScore(double gr, double sp, double len, double cnt)
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{
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// Set the individual scores.
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setGrammar(gr);
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setSpelling(sp);
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setCorrectLength(len);
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setContent(cnt);
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// Set the total score.
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super.setScore(grammar + spelling + correctLength + content);
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}
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/**
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The setGrammar method sets the grammar
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points, validating them before they are set.
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@param g Grammar points.
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*/
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private void setGrammar(double g)
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{
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if (g <= 30.0)
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grammar = g;
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else // Invalid points
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grammar = 0.0;
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}
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/**
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The setSpelling method sets the spelling
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points, validating them before they are set.
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@param s Spelling points.
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*/
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private void setSpelling(double s)
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{
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if (s <= 20.0)
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spelling = s;
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else // Invalid points
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spelling = 0.0;
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}
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/**
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The setCorrectLength method sets the points
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for correct length, validating them before
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they are set.
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@param c Correct length points.
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*/
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private void setCorrectLength(double c)
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{
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if (c <= 20.0)
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correctLength = c;
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else // Invalid points
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correctLength = 0.0;
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}
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/**
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The setContent method sets the points
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for content, validating them before
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they are set.
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@param c Content points.
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*/
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private void setContent(double c)
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{
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if (c <= 30)
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content = c;
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else // Invalid points
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content = 0.0;
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}
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/**
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The getGrammar method returns the points
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awarded for grammar.
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@return Gramar points.
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*/
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public double getGrammar()
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{
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return grammar;
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}
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/**
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The getSpelling method returns the points
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awarded for spelling.
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@return Spelling points.
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*/
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public double getSpelling()
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{
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return spelling;
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}
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/**
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The getCorrectLength method returns the points
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awarded for correct length.
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@return Correct length points.
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*/
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public double getCorrectLength()
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{
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return correctLength;
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}
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/**
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The getContent method returns the points
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awarded for content.
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@return Content points.
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*/
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public double getContent()
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{
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return content;
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}
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/**
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The getScore method returns the overall
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numeric score. Overrides the base class
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method.
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@return Overall numeric score.
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*/
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@Override
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public double getScore()
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{
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return grammar + spelling + correctLength + content;
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}
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}

‎Java Programming Principles 2/Homework/1. Unit One/Programming Exercise 5/src/ExerciseFive/FinalExam.java

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package ExerciseFive;
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import ExerciseFive.GradedActivity;
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/**
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The Essay class stores data about a graded
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activity that is a final exam for the Course
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Grades programming challenge.
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*/
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public class FinalExam extends GradedActivity
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{
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private int numQuestions; // Number of questions
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private double pointsEach; // Points for each question
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private int numMissed; // Questions missed
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/**
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The constructor sets the number of questions on the
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exam and the number of questions missed.
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@param questions The number of questions.
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@param missed The number of questions missed.
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*/
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public FinalExam(int questions, int missed)
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{
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double numericScore; // To hold a numeric score
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// Set the numQuestions and numMissed fields.
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numQuestions = questions;
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numMissed = missed;
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// Calculate the points for each question and
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// the numeric score for this exam.
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pointsEach = 100.0 / questions;
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numericScore = 100.0 - (missed * pointsEach);
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// Call the inherited setScore method to
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// set the numeric score.
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setScore(numericScore);
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}
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/**
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The getPointsEach method returns the number of
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points each question is worth.
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@return The value in the pointsEach field.
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*/
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public double getPointsEach()
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{
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return pointsEach;
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}
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/**
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The getNumMissed method returns the number of
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questions missed.
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@return The value in the numMissed field.
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*/
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public int getNumMissed()
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{
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return numMissed;
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}
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}

‎Java Programming Principles 2/Homework/1. Unit One/Programming Exercise 5/src/ExerciseFive/GradedActivity.java

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package ExerciseFive;
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/**
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The GradedActivity class stores data about a graded
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activity for the Course Grades programming challenge.
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*/
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public class GradedActivity
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{
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private double score; // Numeric score
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/**
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The setScore method sets the score field.
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@param s The value to store in score.
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*/
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public void setScore(double s)
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{
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score = s;
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}
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/**
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The getScore method returns the score.
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@return The value stored in the score field.
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*/
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public double getScore()
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{
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return score;
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}
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/**
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The getGrade method returns a letter grade
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determined from the score field.
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@return The letter grade.
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*/
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public char getGrade()
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{
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char letterGrade;
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if (score >= 90)
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letterGrade = 'A';
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else if (score >= 80)
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letterGrade = 'B';
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else if (score >= 70)
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letterGrade = 'C';
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else if (score >= 60)
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letterGrade = 'D';
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else
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letterGrade = 'F';
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return letterGrade;
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}
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}

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