Question

Step 1

Develop the following class:

Class

Name: CollegeDegree

Access Modifier: public

Instance variables

Name: major

Access modifier: private

Data type: String

Name: numberOfCourses

Access modifier: private

Data type: int

Name: courseNameArray

Access modifier: private

Data type: String [ ]

Name: courseCreditArray

Access modifier: private

Data type: int [ ]

Static variables

Name: maximumNumberOfCourses

Access modifier: private

Data type: int

Initial Value: 40

Constructor

Name: CollegeDegree

Access modifier: public

Parameters: none (default constructor)

Task: sets major to the empty string

Sets numberOfCourses to 0

Sets courseNameArray to refer to an array of Strings with the number of elements equal to the value of the static variable maximumNumberOfCourses

Sets courseCreditArray to refer to an array of ints with the number of elements equal to the value of the static variable maximumNumberOfCourses  

Non-static Methods

Name: setMajor

Access modifier: public

Parameters: newMajor

Return type: void

Task: sets the value of the instance variable major to the value of newMajor

Name: getMajor

Access modifier: public

Parameters: none

Return type: String

Task: returns the value of the instance variable major

Name: addCourse

Access modifier: public

Parameters: courseName (data type String), numberOfCredits (data type int)

Return type: void

Task: if numberOfCredits is greater than or equal to 1 and less than or equal to 5 and numberOfCourses is less than the length of the courseNameArray then place the value of courseName into the courseNameArray in the element whose index is equal to the instance variable numberOfCourses and place the value of numberOfCredits into the courseCreditArray in the element whose index is equal to the instance variable numberOfCourses and then increase the value of the instance variable numberOfCourses by 1

Name: getCourses

Access modifier: public

Parameters: none

Return type: String

Task: returns the concatenation of the name of each course located in the courseNameArray (Note: This can be accomplished by looping through the part of the courseNameArray that is filled with course names and concatenating each of these values into a single string)

Name: getNumberOfCourses

Access modifier: public

Parameters: none

Return type: int

Task: returns the value of the instance variable numberOfCourses

Name: getTotalNumberOfCredits

Access modifier: public

Parameters: none

Return type: int

Task: returns sum of the all the credits in the courseCreditArray (Note: This can be accomplished by looping through the part of the courseCreditArray that is filled with course credits and summing these into a single int)

Static Methods

Name: increaseMaximumNumberOfCourses

Access modifier: public

Parameters: nexMaximumNumberOfCourses

Return type: void

Task: if the value of is greater than the value of the static variable maximumNumberOfCourses then change the value of maximumNumberOfCourses to the value of newMaximumNumberOfCourses

Name: getMaximumNumberOfCourses

Access modifier: public

Parameters: none

Return type: int

Task: returns the value of the static variable maximumNumberOfCourses

Answer 1

public class CollegeDegree {
    private String major;
    private int numberOfCourses;
    private String[] courseNameArray;
    private int[] courseCreditArray;
    private static int maximumNumberOfCourses = 40;

    public CollegeDegree() {
        this.major = "";
        this.numberOfCourses = 0;
        this.courseNameArray = new String[maximumNumberOfCourses];
        this.courseCreditArray = new int[maximumNumberOfCourses];
    }

    public void setMajor(String major) {
        this.major = major;
    }

    public String getMajor() {
        return major;
    }

    public void addCourse(String courseName, int numberOfCredits) {
        if(numberOfCourses >= 1 && numberOfCourses <= 5 && numberOfCourses < courseNameArray.length) {
            courseNameArray[numberOfCourses] = courseName;
            courseCreditArray[numberOfCourses] = numberOfCredits;
            numberOfCourses++;
        }
    }

    public String getCourses() {
        String courses = "";
        for (int i = 0; i < numberOfCourses; i++) {
            courses += courseNameArray[i];
            if (i < numberOfCourses - 1) courses += " ";
        }
        return courses;
    }

    public int getNumberOfCourses() {
        return numberOfCourses;
    }

    public int geTotalNumberOfCredits() {
        int credits = 0;
        for (int i = 0; i < numberOfCourses; i++) {
            credits += courseCreditArray[i];
        }
        return credits;
    }

    public static void increaseMaximumNumberOfCourses(int nexMaximumNumberOfCourses) {
        if (nexMaximumNumberOfCourses > maximumNumberOfCourses) maximumNumberOfCourses = nexMaximumNumberOfCourses;
    }

    public static int getMaximumNumberOfCourses() {
        return maximumNumberOfCourses;
    }
}