Payroll System Using Inheritance and Polymorphism in Java
1. Implement an interface called EmployeeInfo with the following constant variables:
FACULTY_MONTHLY_SALARY = 6000.00
STAFF_MONTHLY_HOURS_WORKED = 160
2. Implement an abstract class Employee with the following requirements:
Attributes
last name (String)
first name (String)
ID number (String)
Sex – M or F
Birth date – Use the Calendar Java class to create a date object
Default argument constructor and argument constructors.
Public methods
toString – returning a string with the following format:
ID Employee number :_________
Employee name: __________
Birth date: _______
mutators and accessors
abstract method monthlyEarning that returns the monthly earning.
3. Implement a class called Staff extending from the class Employee with the following requirements:
Attribute
Hourly rate
Default argument and argument contructors
Public methods
get and set
The method monthlyEarning returns monthly salary (hourly rate times 160)
toString – returning a string with the following format:
ID Employee number :_________
Employee name: __________
Birth date: _______
Full Time
Monthly Salary: _________
Implelment a class Education with the following requirements:
Attributes
Degree (MS or PhD )
Major (Engineering, Chemistry, English, etc … )
Research (number of researches)
Default argument and argument constructors.
Public methods
get and set
Implement a class Faculty extending from the class Employee with the following requirements:
Attributes
Level (Use enum Java)
“AS”: assistant professor
“AO”: associate professor
“FU”: professor
Education object
Default argument and argument constructor
Public methods
mutators and accessors
The method monthlyEarning returns monthly salary based on the faculty’s level.
AS – faculty monthly salary
AO – 1.5 times faculty monthly salary
FU – 2.0 times faculty monthly salary
toString – returning a string with the following format:
ID Employee number :_________
Employee name: __________
Birth date: _______
XXXXX Professor where XXXXX can be Assistant, Associate or Full
Monthly Salary: _________
Implement a class called Partime extending from the class Staff with the following requirements:
Attributes
Hours worked per week
Default argument and argument constructors
Public methods
mutators and accessors
The method monthlyEarning returns monthly salary . The monthly salary is equal to hourly rate times the hours worked in four weeks.
toString – returning a string with the following format:
ID Employee number :_________
Employee name: __________
Birth date: _______
Hours works per month: ______
Monthly Salary: _________
mplement a test driver program that creates a one-dimensional array of class Employee to store the objects Staff, Faculty and Partime.
Using polymorphism, display the following outputs:
a. Employee information using the method toString
Staff
Faculty
Part-time
b. Total monthly salary for all the part-time staff .
c. Total monthly salary for all employees.
d. Display all employee information descending by employee id using interface Comparable
e. Display all employee information ascending by last name using interface Comparer
f. Duplicate a faculty object using clone. Verify the duplication.
Test Data
Staff
Last name: Allen
First name: Paita
ID: 123
Sex: M
Birth date: 2/23/59
Hourly rate: $50.00
Last name: Zapata
First Name: Steven
ID: 456
Sex: F
Birth date: 7/12/64
Hourly rate: $35.00
Last name:Rios
First name:Enrique
ID: 789
Sex: M
Birth date: 6/2/70
Hourly rate: $40.00
Faculty
Last name: Johnson
First name: Anne
ID: 243
Sex: F
Birth date: 4/27/62
Level: Full
Degree: Ph.D
Major: Engineering
Reseach: 3
Last name: Bouris
First name: William
ID: 791
Sex: F
Birth date: 3/14/75
Level: Associate
Degree: Ph.D
Major: English
Reseach: 1
Last name: Andrade
First name: Christopher
ID: 623
Sex: F
Birth date: 5/22/80
Level: Assistant
Degree: MS
Major: Physical Education
Research: 0
