Demonstrate the class in a simple program 5. Course Grades In a course, a teache

Question

Demonstrate the class in a simple program 5. Course Grades In a course, a teacher gives the following tests and assignments: A lab activity that is observed by the teacher and assigned a numeric score. . A pass/fail exam that has 10 questions. The minimum passing score is 70 An essay that is assigned a numeric score. A final exam that has 50 questions. Write a class named courseGzades. The class should have a GeadedAetivity array named gzadeal as a field. The array should have four elements, one for each of the assignments previously described. The class should have the following methods: This method should accept a Gradedhctivity object as its argument. This object should already hold the student's score for the lab activity. Element 0 of the grades field should reference this object setLab: setPansTailExam: This method should accept a Passailxam object as its argument. This object should already hold the student's score for the pass/fail exam. Element 1 of the gradea field should reference this object. This method should accept an Essay object as its argument. (See Programming Challenge 4 for the essay class. If you have not completed Programming Challenge 4, use a dradedkotivity object instead.) This object should already hold the student's score for the essay. Element 2 of the iraa field should reference this object. setEssay setPinalEx This method should accept a rinalExam object as its argument. This object should already hold the student's score for the final exam. Element 3 of the grades field should reference this object ostring This method should return a string that contains the numeric scores and gads for each element in the lii array. Demonstrate the class in a program.

Explanation / Answer

public class CourseGrades {

private GradedActivity grades[] = new GradedActivity[4];

void setLab(GradedActivity activity) {

grades[0] = activity;

}

void setPassFailExam(PassFailExam exam1) {

grades[1] = exam1;

}

void setEssay(GradedActivity activity) {

grades[2] = activity;

}

void setFinalExam(FinalExam exam1) {

grades[3] = exam1;

}

public String toString() {

return " Lab Activity " + grades[0].toString()

+ " Pass Fail Examination " + grades[1].toString() + " Essay "

+ grades[2].toString() + " final Examination "

+ grades[3].toString();

}

}

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