
Concept explainers
Interaction with super class
Program plan:
- Create a class “Employee”,
- Define the method “getHours()” to return “40”.
- Define the method “getSalary()” to return “40000.0”.
- Define the method “getVacationDays()” to return “10”.
- Define the method “getVacationForm()” to return “yellow”.
- Create a class “Marketer” that extends the super class “Employee”,
- Define the method “advertise()” ,
- Print the string.
- Define the method “getSalary()”,
- Call the method “getSalary()” of super class and return the updated value.
- Define the method “main()”,
- Create object for “Marketer” class.
- Call the method “advertise()”.
- Print the value returned from “getsalary()”.
- Define the method “getSalary()”,
- Print the string.
- Define the method “advertise()” ,

This program demonstrates the class that accompanies the other law firm classes.
Explanation of Solution
Program:
File name: “Employee.java”
//Create a class
public class Employee
{
//Define the method
public int getHours()
{
//Retunr "40"
return 40;
}
//Define the method
public double getSalary()
{
//Return "40000.0"
return 40000.0;
}
//Define the method
public int getVacationDays()
{
//Return "10"
return 10;
}
//Define the method
public String getVacationForm ()
{
//Return "yellow"
return " yellow";
}
}
File name: “Marketer.java”
//Create a class
public class Marketer extends Employee
{
//Define the method advertise()
public static void advertise()
{
//Print the string
System.out.println("Act now, while supplies last!");
}
//Define the method
public double getSalary()
{
/*Call the method of super class and return the updated value*/
return super.getSalary() + 10000;
}
//Define the main() method
public static void main(String[] args)
{
//Create object
Marketer m=new Marketer();
//Call the method
m.advertise();
//Print the value returned from getSalary()
System.out.println("$"+m.getSalary());
}
}
Output:
Act now, while supplies last!
$50000.0
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Chapter 9 Solutions
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