Question

College of Winston and Charlotte

This program will calculate the amount for a semester bill at The College of Winston and Charlotte.

Part 1:

Create a class Course.java:

The class has non-static instance variables:

• private String department
• private int courseNumber
• private int courseCredits
• private double courseCost

The class must have a default constructor which will set values as follows:

• department = “unknown”
• courseNumber = 0
• courseCost = 0
• courseCredits = 0

The class must have a non-default constructor which will set values as follows (use the setters):

• department = value passed to constructor
• courseNumber = value passed to constructor
• courseCredits = value passed to constructor
• courseCost = no value will be passed to the constructor, courseCost will be calculated as courseCredits/2 * $500, see setter below (if the course is a Lab Course add $100 to the cost)

The class must have the appropriate getter and setter methods. The setter methods must trap the user to enter valid information as follows:

• courseNumbers must be 001 - 399 (inclusive)
• courseCredits must be 3, 4 or 6
• department must be ENGL, MATH, COMP, HIST, HUMN, SCIE, LANG, PHYS
• courseCost = courseCredits/2 * $500, if the course is a Lab Course add $100 to the cost

The class must have a toString method and an equals method.

Part 2:

Create a LabCourse.java which is a subclass of Course.java.

LabCourse.java adds $100 to the courseCost.

The class must have the appropriate default and non-default constructors.

Getter and setter methods are not needed.

The class must have a toString method and an equals method. Both of those methods must override the inherited toString and equals methods.

A course is a lab course if the department is COMP, SCIE, PHYS

Part 3:

Develop a program (DemoWinstonAndCharlotte_yourInitials.java, where yourInitialsrepresents your initials) that asks the user for the number of courses they will take,  creates an array of Courses, gets the information for each course (department, courseNumber, courseCredits), creates instances of the appropriate class, populates the array with the instances, calculates the cost of each course and the total bill and then prints the information for each course and the total of the bill to the user.

Answer 1

Thanks for the question, The whole assignment is too big. Given the limited time, I have coded the Part 1 and Part 2, I could not finish off the Part 3. Please post Part 3 as a separate post and I will help you with it. Sorry for the incovenience caused here.

Here are the two classes for Part 1 and Part 2

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import java.util.Objects;

public class Course {

    private String department;
    private int courseNumber;
    private int courseCredits;
    private double courseCost;

    public Course() {
        department = "unknown";
        courseNumber = 0;
        courseCost = 0;
        courseCredits = 0;
    }

    public Course(String department, int courseNumber, int courseCredits) {
        setDepartment(department);
        this.courseNumber = courseNumber;
        this.courseCredits = courseCredits * 500 / 2;
        this.courseCost = courseCost;
    }

    public String getDepartment() {
        return department;
    }

    public int getCourseNumber() {
        return courseNumber;
    }

    public int getCourseCredits() {
        return courseCredits;
    }

    public double getCourseCost() {
        return courseCost;
    }

    public void setCourseNumber(int courseNumber) {
        if (1 <= courseNumber && courseNumber <= 399)
            this.courseNumber = courseNumber;
    }

    public void setCourseCredits(int courseCredits) {
        if (3 <= courseCredits && courseCredits <= 6) {
            this.courseCredits = courseCredits;
            courseCost = courseCredits * 500 / 2;
            if (department.equals("COMP") || department.equals("SCIE") || department.equals("PHYS")) {
                this.department = department;
                courseCost += 100;
            }
        }

    }

    public void setDepartment(String department) {
        if (department.equals("ENGL") || department.equals("MATH") ||
                department.equals("HIST") ||
                department.equals("HUMN") ||
                department.equals("LANG"))
            this.department = department;
        else if (department.equals("COMP") || department.equals("SCIE") || department.equals("PHYS")) {
            this.department = department;
            courseCost += 100;
        }
    }

    @Override
    public String toString() {
        return
                "Department: " + department +
                        ", Course Number: " + courseNumber +
                        ", Credits: " + courseCredits +
                        ", Cost $" + courseCost;

    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Course course = (Course) o;
        return courseNumber == course.courseNumber &&
                courseCredits == course.courseCredits &&
                Double.compare(course.courseCost, courseCost) == 0 &&
                Objects.equals(department, course.department);
    }


}

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public class LabCourse extends Course {

    public LabCourse() {
        super();
    }

    public LabCourse(String department, int courseNumber, int courseCredits) {
        super(department, courseNumber, courseCredits);
    }

    @Override
    public String toString() {
        return "Lab Course: " + super.toString();
    }

    @Override
    public boolean equals(Object o) {
        if (o != null && o instanceof LabCourse) {
            return super.equals(o);
        } else {
            return false;
        }

    }
}

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