ICT 203 - Q1c

I would check the location of the associate member within the subscribeMagazine method in the Associate subclass to determine if the Associate Member is eligible to subscribe for the magazine. If the member is eligible to subscribe for the magazine, within the subscribeMagazine method, it will check to see if the member wants to subscribe for the magazine. If the member is eligible and wants to subscribe to the magazine, the value of the variable subscribeMagazine (true) is returned, else false will be returned. The value of the variable subscribeMagazine returned will be used in the computeFee method. If the value of variable subscribeMagazine is true, the additonalFee variable will be added in the calculation of the totalFee, else the additionalFee will not be added to the totalFee.

Question

ICT 203 - Q1b ( Foundations in Modern System Design)

Question

ICT 203 - Q1a ( Foundations in Modern System Design)

Classes involved would be the superclass called Membership, and the subclasses Ordinary and Associate. The superclass Membership would be an abstract class with its common (generic) attributes such as memberName, address and totalFee, and methods such as computeFee(), which would be inherited and reused by the Ordinary and Associate subclasses. Thus, the Ordinary and Associate subclasses have a “is a” relationship with its superclass Membership.

Question

ICT203 - Foundations in Modern System Design Question 1

An employees’ union has two types of membership: ordinary and associate. Ordinary members pay $108 per year and receive a free monthly magazine. Associate members pay $72 per year, but they do not receive the magazine unless they pay an additional charge of $12 per year. Every  member gets a 50% discount off the membership fee, if he is stationed overseas; however, this discount is not applicable to the magazine charge for the associate member as the union does not send the magazine to associate members overseas.

(a) Identify the classes involved and explain the superclass-superclass relationship among  them. (answer)

(b) Draw a UML class diagram to depict the given information, showing the attributes for each  class, and the class hierarchy. (answer)

(c) Explain how you would record the fact that an associate member needs to pay for the  magazine. State also the class or classes concerned, and the attributes and/or methods added. (answer)

(d) Write Java code to define the classes and hierarchy you had identified above. In each class, include the attributes as instance variables of suitable data types, and appropriate  constructor(s) that initialize(s) the instance variables. Note that each subclass should have  its own implementation of the computeFee() method. (answer)

(e) (i) Explain how you might write the computeFee() method for the superclass.

(ii) What is the advantage of having this method in the superclass?

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