Java HomeWork

Part I: (Short Answer)

1.       In Java, what are the three different ways you can implement an interface?

2.       Discuss examples of “is-a” and “has-a” relationships and possible Java implementations.

3.       When is it appropriate to use the various techniques for handling exceptions?

4.       When is it appropriate to use an applet?

5.       Discuss how to convert a GUI application into an applet.

First International Resource Management, Inc. (aka. FIRM) asks you to develop programs to solve the

following problem.

FIRM pays its employees on a weekly basis. FIRM has four types of employees: salaried employees, who are paid a fixed weekly salary regardless of the number of hours worked; hourly employees, who are paid by the hour and receive overtime pay; commission employees, who are paid a percentage of their sales; and salaried-commission employees, who receive a base salary plus a percentage of their sales. FIRM wants to implement a java application that performs its payroll calculations polymorphically. Of course each employ belongs to a department.

Based on the description of the problem and several discussions with the client, a class diagram is agreed upon and the class hierarchy is shown in the diagram. At first, the management wants to see a GUI application about three employee types: HourlyEmployee, SalariedEmployee, and CommissionEmployee.