PROGRAM USING INHERITANCE IN JAVA....

Q3) Derive sub-classes of  ContractEmployee namely HourlyEmployee & WeeklyEmployee with information number of hours & wages per hour, number of weeks & wages per week respectively  & method calculateWages() to calculate their monthly salary. Also override getDesig () method depending on the type of contract employee.

ANSWER:

class Employee

{

            private String firstName;

            private String lastName;

            public String getFirstName()

            {

                        return firstName;

            }

            public String getLastName()

            {

                        return lastName;

            }

            public void setFirstName(String firstName)

            {

                        this.firstName=firstName;

            }

            public void setLastName(String lastName)

            {

                        this.lastName=lastName;

            }

}

class ContractEmployee extends Employee

{

            String depart;

            String desig;

            double salary;

            public void setDepartment(String depart)

            {

                        this.depart=depart;

            }

            public void setDesignation(String desig)

            {

                        this.desig=desig;

            }

            public void setSalary(double salary)

            {

                        this.salary=salary;

            }

            public String getDepartment()

            {

                        return depart;

            }

            public String getDesignation()

            {

                        return desig;

            }

            public double getSalary()

            {

                        return salary;

            }

            public void dispFullName()

            {

                        System.out.println(getFirstName()+getLastName());

            }

}

class RegularEmployee extends Employee

{

            String depart;

            String desig;

            double salary;

            public void setDepartment(String depart)

            {

                        this.depart=depart;

            }

            public void setDesignation(String desig)

            {

                        this.desig=desig;

            }

            public void setSalary(double salary)

            {

                        this.salary=salary;

            }

            public String getDepartment()

{

                        return depart;

            }

            public String getDesignation()

            {

                        return desig;

            }

            public double getSalary()

            {

                        return salary;

            }

            public void dispFullName()

            {

                        System.out.print(getFirstName() + " " + getLastName());

            }

}

class HourlyEmployee extends ContractEmployee

{

            int noOfHrs;

            double wagesPerHrs;

            public void setHours(int noOfHrs)

            {

                        this.noOfHrs=noOfHrs;

            }

            public void setWages(double wagesPerHrs)

            {

                        this.wagesPerHrs=wagesPerHrs;

            }

            public double calculateSalary()

            {

                        return noOfHrs*wagesPerHrs;

            }

            public String getDesignation()

            {

                        return "HourlyEmployee";

            }

               }

class WeeklyEmployee extends ContractEmployee{

            int noOfWeeks;

            double wagesPerWeek;

            public void setWeeks(int noOfWeeks)

            {

                        this.noOfWeeks=noOfWeeks;

            }

            public void setWages(double wagesPerWeek)

            {

                        this.wagesPerWeek=wagesPerWeek;

            }

            public double calculateSalary()

            {

                        return noOfWeeks*wagesPerWeek;

            }

            public String getDesignation()

            {

                        return "WeeklyEmployee";

            }

}