IT210 Unit 7

You need to write a program for the instructions given below:

Create a class named College Course that includes data fields that hold the department (for example, ENG), the course number (for example, 101), the credits (for example, 3), and the fee for the course (for example, $360). All of the fields are required as arguments to the constructor, except for the fee, which is calculated at $120 per credit hour. Include a display () method that displays the course data. Create a subclass named Lab Course that adds $50 to the course fee. Override the parent class display () method to indicate that the course is a lab course and to display all the data. Write an application named UseCourse that prompts the user for course information. If the user enters a class in any of the following departments, create a LabCourse: BIO, CHM, CIS, or PHY. If the user enters any other department, create a CollegeCourse that does not include the lab fee. Then display the course data. Save the files as CollegeCourse.java, LabCourse.java, and UseCourse.java.

Discussion

Inheritance is an important concept in object oriented programming. It allows one class to acquire and extend all the behaviors and attribute of another class. In this context, respond to the following:

• What is the significance of the concept of inheritance within the concept of object oriented programming?
• Provide a programming problem in which inheritance should be used (You do not need to write codes for this discussion. Instead, describe the programming problem and explain why inheritance should be used).
• Research the concept of Polymorphism and, again, provide a programming problem in which polymorphism should be used.