Membership of a club is represented by an instance of the Membership class. A complete v...

Membership of a club is represented by an instance of the Membership class. A complete version of Membership is already provided for you in the club project, and it should not need any modification. An instance contains details of a person’s name and the month and year in which they joined the club. All membership details are filled out when an instance is created. A new Membership object is added to a Club object’s collection via the Club object’s join method, which has the following description:

Complete the join method.

When you wish to add a new Membership object to the Club object from the object bench, there are two ways you can do this. Either create a new Membership object on the object bench, call the join method on the Club object, and click on the Membership object to supply the parameter or call the join method on the Club object and type into the method’s parameter dialog box:

new Membership ("member name ...", month, year)

Each time you add one, use the numberOfMembers method to check both that the join method is adding to the collection and that the numberOfMembers method is giving the correct result.

We shall continue to explore this project with some further exercises later in the chapter.