INHERITANCE AND POLYMORPHISM - Java Programming: From Problem Analysis to Program Design - page 654

public PartTimeEmployee()
//Default constructor
//Set the first name, last name, payRate, and
//hoursWorked to the default values.
//The first name and last name are initialized to an empty
//string by the default constructor of the superclass.
//Postcondition: firstName = ""; lastName = "";
// payRate = 0; hoursWorked = 0;
Figure 10-5 shows the UML class diagram of the class PartTimeEmployee and the
inheritance hierarchy.

PartTimeEmployee

-payRate: double
-hoursWorked: double

+PartTimeEmployee()
+PartTimeEmployee(String, String,
double , double )
+toString(): String
+setNameRateHours(String, String,
double , double ): void
+getPayRate(): double
+getHoursWorked(): double
+calculatePay(): double

Person

PartTimeEmployee

FIGURE 10-5 UML class diagram of the class PartTimeEmployee and the inheritance hierarchy

The definitions of the member methods of the class PartTimeEmployee are as follows:
public String toString()
{

return ( super .toString() + "\'s wages are: $" + calculatePay());

}

public double getPayRate()
{

return payRate;

}

public double getHoursWorked()
{

return hoursWorked;

}

public double calculatePay()
{

return (payRate * hoursWorked);

}