Question

Hello. I need help writing the following Java Program. Thank you

Develop a class encapsulating the concept of a college course, assuming that a course has following attributers: code (for instance COSC1337), a description, and a number of credits (for instance 3). Include a constructor, the accessors, mutators and methods ‘toString’, ‘equals’, and ‘finalize’. Write a client class to test the behavior of the class and its methods. The outline of the class is given as follows: public class Course { private String course; private String description; private int credits; private int maxStudents; public Course( ) { } public Course (String course, String desc, int credits, int maxNum ) { } public String getCourse ( ) { } public void setCourse ( String c ) { } public String getDescription ( ) { } public void setDescription ( String desc ) { } public int getCredits ( ) { } public void setCredits ( int cred ) { } public int getStudents ( ) { } public void setStudents ( int students ) { } public String toString ( ) { } public boolean equals ( Object obj ) { } public void finalize ( ) { } } ALL METHODS MUST BE IMPLEMENTED!!! Write a client program(test class) to THOROUGHLY test the class Course. In the client program, create two Course objects. Assign any values to the two objects. Exercise the methods to verify their functionality. Approach to Testing: • Create TWO class objects o One object with the default constructor  Test the set methods initializing the instance variables to the desired values.  Use the get methods to verify that the ‘set’s worked properly. o One object with the overloaded constructor – setting unique values in instance variables • Test the ‘set’ methods with the default object • Test the ‘get’ methods – System.out.println ( “course = “ + obj.getCourse() ). • Test the ‘toString’ method – never EXPLICITLY call the ‘toString’ method. Two separate files: • Course.java • CourseTest.java (client program) ( or other name ) Approach to Testing: •Create an object with the default constructor o Verify and print to insure default values were assigned.  Use the ‘get’ methods coupled with output statements. o Initialize all of the instance variables using the ‘set’ methods. o Verify and print the values of the instance variables using the ‘toString’ method. •Create an object with the overloaded constructor. o Verify and print the values of the instance variables using the ‘toString’ method. •Verify each of the other methods – o Equals method – needs three objects, 2 equal, 2 unequal  Compare equals  Compare unequal’s o ‘toString’ method o Finalize method. o Others.

Answer 1

Following are the code for the respective class files:
Course.java

public class Course{

    private String course;

    private String description;

    private int credits;

    private int maxStudents;

    public Course() {

        this.course = "NIL";

        this.description = "NIL";

        this.credits = 0;

        this.maxStudents = 0;

    }

    public Course(String course, String description, int credits, int maxStudents) {

        this.course = course;

        this.description = description;

        this.credits = credits;

        this.maxStudents = maxStudents;

    }

    public String getCourse() {

        return this.course;

    }

    public void setCourse(String course) {

        this.course = course;

    }

    public String getDescription() {

        return this.description;

    }

    public void setDescription(String description) {

        this.description = description;

    }

    public int getCredits() {

        return this.credits;

    }

    public void setCredits(int credits) {

        this.credits = credits;

    }

    public int getMaxStudents() {

        return this.maxStudents;

    }

    public void setMaxStudents(int maxStudents) {

        this.maxStudents = maxStudents;

    }

    @Override

    public boolean equals(Object o) {

        if (o == this)

            return true;

        if (!(o instanceof Course)) {

            return false;

        }

        Course course = (Course) o;

        return this.course.equals(course.course) && this.description.equals(course.description) && credits == course.credits && maxStudents == course.maxStudents;

    }

    @Override

    public String toString() {

        return "{" +

            " course='" + getCourse() + "'" +

            ", description='" + getDescription() + "'" +

            ", credits='" + getCredits() + "'" +

            ", maxStudents='" + getMaxStudents() + "'" +

            "}";

    }

    @Override

    public void finalize(){

        this.course = null;

        this.description = null;

        this.credits = 0;

        this.maxStudents = 0;

    }

}

Image for indentation reference (Please see through this link: https://imgur.com/a/6OULKb9 because large photos on HomeworkLib become pixelated):

CourseTest.java

public class CourseTest{

    public static void main(String[] args){

        //Object using default constructor

        Course course1 = new Course();

        //Printing default values of course1

        System.out.println("Default values for course1");

        System.out.println("course= " + course1.getCourse());

        System.out.println("description= " + course1.getDescription());

        System.out.println("credits= " + course1.getCredits());

        System.out.println("maxStudents= " + course1.getMaxStudents());

        /* setting values of course 1 */

        course1.setCourse("COSC1337");

        course1.setDescription("Java Course for CS Students");

        course1.setCredits(3);

        course1.setMaxStudents(45);

        /*Verifying values*/

        System.out.println("Course1 after settig values");

        System.out.println("course= " + course1.getCourse());

        System.out.println("description= " + course1.getDescription());

        System.out.println("credits= " + course1.getCredits());

        System.out.println("maxStudents= " + course1.getMaxStudents());

        // Values using toString

        System.out.println("Values of course1 using toString");

        System.out.println(course1);

        //Object using overloaded constructor

        Course course2 = new Course("COSC1227", "Machine learning course" , 4 , 30);

        //Printing of course2 using toString

        System.out.println("Values of course2 using toString");

        System.out.println(course2);

        // creting third object for equal testing:

        Course course3 = new Course("COSC1337", "Java Course for CS Students" , 3 , 45 );

        System.out.println("course1 equals course2: " + course1.equals(course2));

        System.out.println("course1 equals course3: " + course1.equals(course3));

        System.out.println("course2 equals course3: " + course2.equals(course3));

    }

}

Image for indentation reference:

If everything is clear feel free to give a thumbs up otherwise please ask your doubt. :)