CSE1IOX Intermediate Object Oriented Programming Marketing Management

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You are required to create a Java application that displays the information of an employee based on whether they are full-time, part-time or sessional instructors. You will need to create an abstract java class called Employee. You need to create the following sub-classes from this abstract class:

Full TimeInstructor, SessionalInstructor, PartTimeInstructor These derived classes will override (polymorphism) the abstract method earnings() of the Employee class based on their respective earnings calculated for each type of employment. Also, you need to override the toString() method to show the employee information as in the Employee class, and their pay according to each of the derived classes.

Create another new class EarningsTesting and within its main() method create two instances of each of the three classes and print the instances to view their details. You need to also implement exception handling with the methods; for example, to test that the salary or hours worked is a number and doesn’t contain any letters.

The assignment is divided into five tasks as provided below:

Tasks

Task1

Create an Employee abstract class as described below. Create methods to get and set each of the 3 properties in the class. Create an abstract earnings class that will  classes. Override the toString() method to display the employee firstName, lastName and taxFileNumber.

Task 2

To track and calculate the earnings of the full time employees create the class FullTimeInstructor which is inherited from the Employee class. Create a property to store their weekly salary and also associated functions to set and get the salary. At class initialisation you must be able to set all four properties of the class. Override the earnings method to return the salary. Override the toString() method to display the employee firstName, lastName and taxFileNumber and the earnings() of the employee.

Task 3

To track and calculate the earnings of the sessional employees, create the class SessionalInstructor which is inherited from the Employee class. Create a property to store their hourly rate and hours worked. Also create the associated functions to set and get the two new properties. At class initialization you must be able to set all five properties of the class. Override the earnings method to return the earnings. Override the toString() method to display the employee firstName, lastName andtaxFileNumber and the earnings() of the employee. Make sure that the first three properties are accessed via the parent class method and earnings information provided from the overridden earnings() class.

Task 4

To track and calculate the earnings of the part-time employees, create the class PartTimeInstructor which is inherited from the Employee class. Create a property to store their hourly rate and hours worked for both lecturing and marking. Also create the associated functions to set and get the four new properties. At class initialization you must be able to set all seven properties of the class. Override the earnings method to return the earnings as stated in the method description. Override the toString() method to display the employee firstName, lastName and taxFileNumber and the earnings() of the employee. Make sure that the first three properties are accessed via the parent class method and earnings information provided from the overridden earnings() class.

Task 5

Create a new class EarningsTesting and within its main()class create two instances of each of the three class with dummy data. Print the instances to show the outputs (eg: System.out.printf(“First instance: n %s”,firstInstance)). The outputs of each of the instance should be according to what you have defined in the toString() methods in theassociated class.

Task 6

You must throw an exception every time a negative number or letter is entered, and you must have a catch block that catches that exception. Use the getMessage method of the Throwable class to display the message associated with this exception. You may do other processing also if you wish. This catch block for example might display a dialog box with “The salary must be > 0!”.

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