Consider a class named GraduateCourse that includes

• Three data members i.e.
• courseID (e.g. CEN2012),
• courseName (e.g. OOP),
• creditHours (e.g. 3 or 4), and
• courseFee (e.g. Rs. 10,000).
• A parameterized constructor to initialize data members with values specified by the user

Derive a class named ResearchCourse from Course class, which contains

• An additional data field named experimentFee
• A parameterized constructor to initialize its own data member along with data members of the base class inherited in derived class
• ResearchCourse class also contains a member function named setExperimentFee to modify the value of its own data field
• A function named display to show the values of its own attribute along with the attributes of its base class
• A function named totalFee to display the value of aggregated fee (course fee + experiment fee) for a particular course object

Implement both classes and in the main() function, instance of ResearchCourse class. Invoke appropriate functions to display all attribute values as well as the total fee for this particular instance.

Source code:

Main.java

class GraduateCourse
{
   String courseID; //(e.g. CEN2012)
   String courseName; //(e.g. OOP)
   int creditHours ;//(e.g. 3 or 4), and
   double courseFee; //(eg 10,000)

   public GraduateCourse(String id, String name, int hrs, double fees)
   {
       this.courseID=id;
       this.courseName=name;
       this.creditHours=hrs;
       this.courseFee=fees;
   }

   public void setcourseID(String id){
       this.courseID=id;
   }
   public String getcourseID(){
       return this.courseID;
   }
    public void setcourseName(String name){
       this.courseName=name;
   }
   public String getcourseName(){
       return this.courseName;
   }
    public void setcreditHours(int hrs){
       this.creditHours=hrs;
   }
   public int getcreditHours(){
       return this.creditHours;
   }
    public void setcourseFees(double fees){
       this.courseFee=fees;
   }
   public double getcourseFees(){
       return this.courseFee;
   }
}


class ResearchCourse extends GraduateCourse
{
   double experimentFee;
   public ResearchCourse (String id, String name, int hrs, double fees,double expfees)
   {
       super(id,name,hrs,fees);
       this.experimentFee=expfees;
   }
   public void setexperimentFee(double expfees){
       this.experimentFee=expfees;
   }
   public double getexperimentFee(){
       return this.experimentFee;
   }

   public void totalFee()
   {
       double totalfee=this.getexperimentFee()+this.getcourseFees();
       System.out.println("Total amount of fees to be paid is: "+totalfee);
   }

   public void display()
   {
       System.out.println("courseID: "+this.getcourseID());
       System.out.println("courseName: "+this.getcourseName());
       System.out.println("creditHours: "+this.getcreditHours());
       System.out.println("courseFee: "+this.getcourseFees());
       System.out.println("experimentFee: "+this.getexperimentFee());
       this.totalFee();
   }
}

public class Main
{
   public static void main (String[] args) {
       ResearchCourse rcourse1=new ResearchCourse("CEN2012","OOP",4,10000,5000);
       rcourse1.display();
       System.out.println();
       ResearchCourse rcourse2=new ResearchCourse("CEN2016","Java Programming",6,15000,7000);
       rcourse2.display();
   }
}

Output:

courseID: CEN2012
courseName: OOP
creditHours: 4
courseFee: 10000.0
experimentFee: 5000.0
Total amount of fees to be paid is: 15000.0

courseID: CEN2016
courseName: Java Programming
creditHours: 6
courseFee: 15000.0
experimentFee: 7000.0
Total amount of fees to be paid is: 22000.0

I have done this code using an online compiler .

So If you want to execute this code in your browser then just paste "https://onlinegdb.com/rJy79VseD" and click run.