Question

Course Class

1. Create a class called Course. It will not have a main method; it is a business class.
2. Put in your documentation comments at the top. Be sure to include your name.
3. Course must have the following instance variables named as shown in the table:

Variable name	Description
crn	A unique number given each semester to a section (stands for Course Registration Number)
subject	A 4-letter abbreviation for the course (e.g., ITEC, PHED, CHEM)
number	A 4-digit number associated with the course (e.g., 1001, 1008, 0099). Note when selecting the data type: it is important to store 0099 instead of 99.
sectionId	A 2-digit number associated with a particular section of a course (e.g., 01, 13, 47)
creditHours	Number of credit hours the course is worth. Valid values are 0, 1, 2, 3, or 4. The default value is 3.
instructor	First and last name of the instructor teaching the course. If the instructor is not known, this should be listed as “TBA”
isAvailable	Value is either true or false based upon whether the course is available for registration. Default is false.

4. Create a constructor that has the crn, subject, number, and sectionId. Initialize the other instance variables based upon the default values in the table above.
5. Add a 7-argument constructor that uses all parameter variables to set the instance variables. Make sure your constructor calls the setters from #7, to ensure all data is validated. (All arguments will be of type String.)
6. Generate all the getters and setters
7. Changes to make to generated getters and setters to make sure data is valid:
   • public void setCrn(String input) – if input consists of all digits, convert input to integer. Use this integer to set the CRN. Otherwise, set the CRN to 9001 and display an error message that “Invalid value typed for CRN. Defaulting to 9001.”  
   • public void setNumber(String input) – if input consists of all digits and is in the range of 1 - 9999, convert input to integer. Use this integer to set the course number. Otherwise, set the course number to 1001 and display an error message that “Invalid value typed for course number. Defaulting to 1001.”  
   • public void setSectionId(String input) – if input consists of all digits and is in the range of 1 - 80, convert input to integer. Use this integer to set the section Id. Otherwise, set the section ID to 1 and display an error message that “Invalid value typed for section ID. Defaulting to 1.”  
   • public void setCreditHours(String input) – if input consists of all digits and is in the range of 0 - 4, convert input to integer. Use this integer to set the number of credit hours. Otherwise, set the credit hours to 3 and display an error message that “Invalid value typed for credit hours. Defaulting to 3.”  
   • public void setIsAvailable(String input) – if input starts with ‘t’, ‘T’, ‘y’, or ‘Y’, set Available to true. Otherwise, set isAvailable to false.
8. Create the toString method

ScheduleTester Class

1. Create a class called ScheduleTester. This is the only class that will have a main method in it.
2. Put in your documentation comments at the top. Be sure to include your name and your instructor’s name.
3. Inside the main method

• Construct a Course object named course1. Use the set methods to make sure it has valid information in it.
• Construct a Course object named course2. Use the set methods to make sure it has valid information in it.
• Construct a Course object named course3. Use the set methods to make sure it has valid information in it.
• SOP course1
• SOP course2

- SOP course3 Schedule

Class

1. Create a class called Schedule. It will not have a main method; it is a business class.
2. Put in your documentation comments at the top. Be sure to include your name and your instructor’s name. 3) Schedule has the following instance variable named as shown in the table:

Variable name		Description
courseList	An ArrayList of Course objects

4. Create a no-argument constructor. Inside this constructor, instantiate the ArrayList of Course objects by having a line that looks like this:

courseList = new ArrayList<Course>();

5. Generate all the getters and setters.
6. Using the example provided above, write a toString method for this class.
7. Other methods you will need to create:

• public int numAvailableCourses() – This method returns the number of courses in the schedule which are considered available
• public int totalCredits() – This method should iterate through the courses and return the total number of credit hours being taken.
• public int howManyBySubject(String subject) – This method is passed a specific subject such as “ITEC” or “ENGL”. It will then iterate through the courses which are part of the team. It will return the number of courses that match the subject passed in.
• public void addCourse(Course aCourse) – This method adds the provided course to the schedule

ScheduleTester Class again

Inside the main method for the ScheduleTester class, add the following line right after your SOP of course3

• Construct a Schedule object called mySchedule
• Add course1, course2, and course3 to mySchedule
• SOP mySchedule
• Call each of the methods of the Schedule class. SOP the expected and actual results

Answer 1

Thanks for the question.

Here is the completed code for this problem.  Let me know if you have any doubts or if you need anything to change.

Thank You !!

================================================================================================

public class Course {

    private int crn;
    private String subject;
    private String number;
    private int sectionId;
    private int creditHours;
    private String instructor;
    private boolean isAvailable;

    //Create a constructor that has the crn, subject, number, and sectionId. Initialize the other instance variables based upon the default values in the table above.

    public Course(int crn, String subject, String number, int sectionId) {
        this.crn = crn;
        this.subject = subject;
        this.number = number;
        this.sectionId = sectionId;
        creditHours = 3;
        instructor = "TBA";
        isAvailable = false;
    }

    //Add a 7-argument constructor that uses all parameter variables to set the instance variables.

    public Course(String crn, String subject, String number, int sectionId, int creditHours, String instructor, boolean isAvailable) {
        setCrn(crn);
        this.subject = subject;
        setNumber(number);
        this.sectionId = sectionId;
        this.creditHours = creditHours;
        this.instructor = instructor;
        this.isAvailable = isAvailable;
    }

    public void setCrn(String input) {
        try {
            crn = Integer.parseInt(input);
        } catch (NumberFormatException nfe) {
            System.out.println("Invalid value typed for CRN. Defaulting to 9001.");
            crn = 9001;
        }
    }

    public void setNumber(String input) {
        try {
            int number = Integer.parseInt(input);
            if (1 <= number && number <= 9999) {
                if (number < 10) this.number = "000" + number;
                else if (number < 100) this.number = "00" + number;
                else if (number < 1000) this.number = "0" + number;
                else this.number = String.valueOf(number);
            } else {
                System.out.println("Invalid value typed for course number. Defaulting to 1001.");
                this.number = "1001";
            }
        } catch (NumberFormatException nfe) {
            System.out.println("Invalid value typed for course number. Defaulting to 1001.");
            this.number = "1001";
        }

    }

    public void setSectionId(String input) {
        try {
            int number = Integer.parseInt(input);
            if (1 <= number && number <= 80) {
                sectionId = number;
            } else {
                System.out.println("Invalid value typed for section ID. Defaulting to 1.");
                this.sectionId = 1;
            }
        } catch (NumberFormatException nfe) {
            System.out.println("Invalid value typed for section ID. Defaulting to 1.");
            this.sectionId = 1;
        }

    }

    public void setCreditHours(String input) {
        try {
            int number = Integer.parseInt(input);
            if (0 <= number && number <= 4) {
                creditHours = number;
            } else {
                System.out.println("Invalid value typed for credit hours. Defaulting to 3.");
                creditHours = 3;
            }
        } catch (NumberFormatException nfe) {
            System.out.println("Invalid value typed for credit hours. Defaulting to 3.");
            creditHours = 3;
        }

    }

    public void setIsAvailable(String input) {

        char firstLetter = input.charAt(0);
        if (firstLetter == 't' || firstLetter == 'T') {
            isAvailable = true;
        } else if (firstLetter == 'f' || firstLetter == 'F') {
            isAvailable = false;
        } else {
            isAvailable = false;
        }

    }

    public int getCrn() {
        return crn;
    }

    public String getSubject() {
        return subject;
    }

    public String getNumber() {
        return number;
    }

    public int getSectionId() {
        return sectionId;
    }

    public int getCreditHours() {
        return creditHours;
    }

    public String getInstructor() {
        return instructor;
    }

    public boolean isAvailable() {
        return isAvailable;
    }

    public void setSubject(String subject) {
        this.subject = subject;
    }

    public void setInstructor(String instructor) {
        this.instructor = instructor;
    }

    @Override
    public String toString() {
        return
                "Crn: " + crn +
                        ", Subject: " + subject +
                        ", Number: " + number +
                        ", Section Id: " + sectionId +
                        ", Credit Hours: " + creditHours +
                        " hours, Instructor: " + instructor +
                        ", course available: " + isAvailable;

    }
}

=======================================================================================

import java.util.ArrayList;

public class Schedule {

    //Schedule has the following instance variable named as shown in the table:
    private ArrayList<Course> courseList;

    //Create a no-argument constructor.
    public Schedule() {
        courseList = new ArrayList<Course>();
    }

    //Generate all the getters and setters.
    public ArrayList<Course> getCourseList() {
        return courseList;
    }
    //Generate all the getters and setters.
    public void setCourseList(ArrayList<Course> courseList) {
        this.courseList = courseList;
    }

    //Using the example provided above, write a toString method for this class.
    @Override
    public String toString() {
        StringBuffer courses = new StringBuffer();
        for(Course course: courseList){
            courses.append(course).append("\n");
        }
        return courses.toString();
    }

    //This method returns the number of courses in the schedule which are considered available
    public int numAvailableCourses(){

        int availableCourseCount=0;
        for(Course course : courseList){
            availableCourseCount+=course.isAvailable()?1:0;
        }
        return availableCourseCount;
    }

    // This method should iterate through the courses and return the total number of credit hours being taken.
    public int totalCredits(){
        int totalCredits =0;

        for(Course course:courseList)
            totalCredits+=course.getCreditHours();

        return totalCredits;
    }

    // This method is passed a specific subject such as “ITEC” or “ENGL”.
    // It will then iterate through the courses which are part of the team. It will return the number of courses that match the subject passed in.
    public int howManyBySubject(String subject){
        int subjectCount =0;
        for(Course course:courseList)
            subjectCount+=course.getSubject().equalsIgnoreCase(subject)?1:0;

        return subjectCount;
    }

    //public void addCourse(Course aCourse) – This method adds the provided course to the schedule
    public void addCourse(Course aCourse){
        courseList.add(aCourse);
    }


}

=======================================================================================