Android™ How to Program, Second Edition

Class Employee

Class Employee (Fig. F.8) has instance variables firstName, lastName, birthDate and hireDate. Members firstName and lastName (lines 6–7) are references to String objects. Members birthDate and hireDate (lines 8–9) are references to Date objects. This demonstrates that a class can have as instance variables references to objects of other classes. The Employee constructor (lines 12–19) takes four parameters—first, last, dateOfBirth and dateOfHire. The objects referenced by the parameters are assigned to the Employee object’s instance variables. When class Employee’s toString method is called, it returns a String containing the employee’s name and the String representations of the two Date objects. Each of these Strings is obtained ...