Assignment 10 Solution

·        Design an abstract Employee class that has the following members: o A field for the ID of the employee (an integer)

 

o A field for the year that the employee was hired (an integer) o A field for the base salary of the employee (double)

 

o A field for the total compensation of the employee (double) o A constructor and appropriate getters and setters

 

o A toString() method that displays the employee’s name, the year in which the employee was hired, his or her base salary, and total compensation.

 

·        Design a JuniorEmployee class that extends the Employee class. The JuniorEmployee class should have the following members:

o A field for commission (double).

o A constructor and appropriate setters and getters.

 

o A toString() method that overrides the toString() method in the base class. The JuniorEmployee class’s toString() method should display only the employee’s ID, the year he or she was hired, and the commission.

 

·        Design a SeniorEmployee class that extends the Employee class. The SeniorEmployee class should have the following members:

o A field for the annual bonus (double).

o A constructor and appropriate setters and getters.

 

o   A toString() method that overrides the toString() method in the base class. The SeniorEmployee class’s toString() method should display only the employee’s ID, the year he or she was hired, and the employee’s annual bonus.

 

·        Design a Manager class that extends the Employee class. The Manager class should have the following members:

 

o   A field for stock dividend (double)

o   A constructor and appropriate setters and getters

o   A ShowDividend() method that displays the amount of dividend.

 

o   A toString() method that overrides the toString() method in the base class. The Manager class’s toString() method should display only the employee’s ID, the year he or she was hired, and the employee’s dividend.

 

·        Design an Interface named EmployeeCompensation. It has one methods: CalculateTotalCompensation() which returns the total compensation. JuniorEmployee, SeniorEmployee, and Manager classes MUST implement this Interface.

 

o   JuniorEmployee’s total compensation is baseSalary + commission

 

o   SeniorEmployee’s total compensation is baseSalary + annualBonus o Manager’s total compensation is baseSalary + dividend

 

Demonstrate/test the classes in a program that has one Employee array. The

program reads various employees’ data from an existing file named

 

“Employees.txt” and create appropriate

(JuniorEmployee/SeniorEmployee/Manager) objects based the type information of

an employee. For example, if an employee’s type is Junior, the program should

create a JuniorEmployee object. Then, insert various JuniorEmployee,

SeniorEmployee, and Manager objects to the array elements.

 

1.     The program uses selection sort algorithm to sort the array based on an Employee’s ID in ascending order.

 

2.     The program steps through the array, calling each object’s toString() method.

 

3.     The program steps through the array, calling the ShowDividend() method from every Manager object. Your program MUST be able to distinguish every Manager object from all of those Employee object in the array.

Input

 

The input is from an existing file named “Employees.txt”. Note, if the file does not exist, your program MUST display an error message and terminate gracefully.

 

Output

 

Your program should display the following on the console and to a file named employeeOutput.txt:

 

·        Each employee’s ID, title (Senior, Junior, Manager), yearHired, and total compensation (base salary + commission/annual bonus/dividend), along with the content of its toString() method. They should be displayed in ascending order.

 

·        For every manager, display his or her dividend using ShowDividend() method.

 

 

 

Sample output:

 

ID YEAR_HIRED TITLE BASE_SALARY COMPENSATION 11 1999 Senior $50,000 $60,000

 

This is a senior employee. ID is 11, hired since 1999, and annual bonus is $10,000.

12             2000                              Junior                $50,000                            $55,000

This is a junior employee. ID is 12, hired since 2000, and commission is $5,000.

13             1980                              Manager          $80,000                            $100,000

This is a manager. ID is 13, hired since 1980, and stock dividend is $20,000.

14             2012                              Junior                $50,000                            $51,000

 

This is a junior employee. ID is 14, hired since 2012, and commission is $1,000.



 

 

 

Employee 13 is a manager. Dividend is $20,000!

 

Good bye!

 

 

Use of Methods, Parameters, Modularity, Design, etc.

 

Part of your grade on this and ALL future programming projects in this course will be determined by how well you use multiple functions and parameter passing appropriately and how well you design a modular and functionally cohesive

 

program using the principles discussed in class. Large grade point penalties can be incurred for not setting up a modular, well designed program structure. This emphasizes good program structure, design, and fundamental software engineering principles.

 

Miscellaneous

 

Be sure to read and understand the sections in the Course Syllabus handout on general project requirements. Also be sure to study the style, documentation and formatting guidelines discussed in the Programming Style Guidelines handout and in the lecture.

 

What File To Turn In and How to Turn In Your Work using Blackboard

 

You must turn in your Java program source file in a zip file. The zip file must include an Employee .java file, JuniorEmployee.java, SeniorEmployee.java, Manager.java, EmployeeCompensation.java, and a MainProgram.java file which includes the main() method. The zip file’s name must follow this format: hw10_yourLastNameLowerCase_yourFirstNameLowerCase.zip

Hence, file names will look something like "hw10_tian_guanyu.zip"