Lab Instructions
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Java Programming COMP-228
Lab Assignment #1 _____________Page 1 of 2
LAB ASSIGNMENT #1
Due Date: Week 03 Marks/Weightage: 10/5%
Purpose: The purpose of this Lab Assignment is to:
Practice the use of instance data members, constructors, methods in Java classes and
objects
References: Read the course’s text book “Java How to program, 11th edition Early Objects”, Chapter 03 and
the lecture notes/ppts. This material provides the necessary information that you need to
complete the exercises.
Instructions: Be sure to read the following general instructions carefully:
This lab should be completed individually by all the students. You will have to demonstrate your
solution in a scheduled lab session and submitting the project through drop box link on e-Centennial.
You must name your Eclipse work space according to the following rule:
FirstName-LastName_SectionNumber_COMP228_Labnumber
For Example: Joh-Smith_Sec001_COMP228_Lab01
Each exercise should be placed in a separate package named firstname-last-name_exercise1,
firstname-last-name_exercise2 etc.
Submit your assignment in a zip file that is named according to the following rule:
FirstName-LastName_SectionNumber_COMP228_Labnumber.zip
Example: Joh-Smith_Sec001_COMP228_Lab01.zip (if your section is 001..)
Apply the naming conventions for variables, methods, classes, and packages:
- variable names start with a lowercase character for the first word and uppercase for every other word
- classes start with an uppercase character of every word
- packages use only lowercase characters
- methods start with a lowercase character for the first word and uppercase for every other word
Exercise #1: [10 marks]
Write a Java application using eclipse as IDE, that implements the following class(es) as per business requirements
mentioned below:
Create a BasePlusCommissionEmployee class (BasePlusCommissionEmployee.java) that has the following instance
variables:
- Employee ID, first name, last name, base salary, gross sales ( amount in dollars) and commission rate.
Define their data types appropriately.
- Define only getters for employee ID, first name, last name and base salary. Ensure the proper ( no negative
and null values ) data values by implementing data validations.
- Use default value of 200.00 dollars for base salary for all the employees.
Java Programming COMP-228
Lab Assignment #1 _____________Page 2 of 2
- Define getter and setter for gross sales and commission rate. Ensure their values should never be negative
or zero.
- Commission rate should be between 0.1 and 1.0%. Set default value 0.1.
- Class should have defined two overloaded constructors:
o One for initializing all the instance data members
o Second for initializing employee ID, first name, base salary only.
- Define a public method - double earnings() which calculates employee’s commission ( commission rate *
gross sales + base salary )
- Define a public method – String toString() which is used to display the object’s data
Create a driver class – BasePlusCommissionEmployeeTest (BasePlusCommissionEmployeeTest.java) which tests above
class by at least creating two objects of the BasePlusCommissionEmployee class.
Exercise #2: [10 marks]
Write a Java application that implements the following class(es) as per business requirements mentioned below:
Create a CheckingAccount class (CheckingAccount.java) that has the following instance variables:
- Account number , customer name, account balance
- Define only getter for account number and customer name
- Define getter and setter for account balance. Balance should be positive and there should be minimum
balance of 50.00 dollars all the time.
- Class should have defined a constructor:
o For initializing all the instance data members
- Define one public method – public double withdraw (double amount) which is used for taking out money.
With every withdrawal, there is transaction fee of 2.00 dollars.
- Define a public method – String toString() which is used to display the object’s data
Create a driver class – CheckingAccountTest (CheckingAccountTest.java) which tests above class by at least creating two
objects of the CheckingAccount class with different set of data values.
Evaluation:
Functionality
Correct implementation of classes
(instance variable declarations,
constructors, getter and setter
methods etc.)
70%
Correct implementation of driver
classes (declaring and creating objects,
calling their methods, interacting with
user, displaying results)
20%
Comments, correct naming of
variables, methods, classes, etc.
5%
Friendly input/output
5%
Total
100%
