Chapter 8, Problem 9E

 Implementation of the derived class “RegularPay”:

The implementation of the derived class “RegularPay” is given below:

• • The “RegularPay” class is derived from the “PayCalculator” abstract class as discussed in previous question.
• • Define the constructor.
  • ○ Call the “super” method with an argument.
• • Define the main method,
  • ○ Create an object for the class “RegularPay”.
  • ○ Call the method with an argument and display the result.
  • ○ Change the input value and again call the method and display the result.

The creation of the abstract class “PayCalculator” is given below:

• • Declare the “payRate” variable.
• • Define the constructor.
  • ○ Set the value to the “payRate”.
• • The “computePay” method is used to return the pay for a given amount of time.
• • The “changeRate” method is used to set the new value to the pay rate.

 Program:

 Filename: “RegularPay.java”

//definition of "RegularPay" class

public class RegularPay extends PayCalculator

{

    //definition of constructor

    public RegularPay(Double rate)

    {

        //call the "super" method

        super(rate);

    }

    //definition of main method

    public static void main(String[] args)

    {

        //create an object for the class

        RegularPay x = new RegularPay(5...

 Implementation of the derived class “HazardPay”:

The implementation of the derived class “HazardPay” is given below:

• • The “HazardPay” class is derived from the “PayCalculator” abstract class as discussed in previous question.
• • Define the constructor.
  • ○ Call the “super” method with an argument.
• • Override the “computePay” method that returns the amount returned by the base class method multiplied by “1.5”.
• • Define the main method
  • ○ Create an object for the class “HazardPay”.
  • ○ Call the method with an argument and display the result.
  • ○ Change the input value and again call the method and display the result.

The creation of the abstract class “PayCalculator” is given below:

• • Declare the “payRate” variable.
• • Define the constructor.
  • ○ Set the value to the “payRate”.
• • The “computePay” method is used to return the pay for a given amount of time.
• • The “changeRate” method is used to set the new value to the pay rate.

 Program:

 Filename: “HazardPay.java”

//definition of "HazardPay" class

public class HazardPay extends PayCalculator

{

    //definition of constructor

    public HazardPay(Double rate)

    {

        //call the "super" method

        super(rate);

    }

    // override the method

    public double computePay(double hours)

    {

        //call the "super" method

        return super.computePay(hours)* 1.5;

    }

    //definition of main method

    public static void main(String[] args)

    {

        //create an object for the class

        HazardPay x = new HazardPay(5...