9.4 Relationship Between Superclasses and Subclasses
We now use an inheritance hierarchy containing types of employees in a company’s payroll application to discuss the relationship between a superclass and its subclass. In this company, commission employees (who will be represented as objects of a superclass) are paid a percentage of their sales, while base-salaried commission employees (who will be represented as objects of a subclass) receive a base salary plus a percentage of their sales.
We divide our discussion of the relationship between these classes into five examples. The first declares class CommissionEmployee
, which directly inherits from class Object
and declares as private
instance variables a first name, last name, social security ...
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