9.4.2 Creating and Using a BasePlusCommissionEmployee Class

We now discuss the second part of our introduction to inheritance by declaring and testing (a completely new and independent) class BasePlusCommissionEmployee (Fig. 9.6), which contains a first name, last name, social security number, gross sales amount, commission rate and base salary. Class BasePlusCommissionEmployee’s public services include a BasePlusCommissionEmployee constructor (lines 15–42) and methods earnings (lines 111–114) and toString (lines 117–126). Lines 45–108 declare public get and set methods for the class’s private instance variables (declared in lines 7–12) firstName, lastName, socialSecurityNumber, grossSales, commissionRate and baseSalary. These variables and ...

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