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CIS/355 iLab 4 of 6
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iLab 4 of 6: Inheritance and Simple GUI
i L A B O V E R V I E W
Scenario and Summary
In this lab you will create one project that uses inheritance and two simple Graphical User Interface (GUI)
programs.
Deliverables
Program files for each of the following three programs
1. InheritanceTest
2. DayGui
3. OfficeAreaCalculator
At the beginning of ALL your programs, put a comment box that includes the program name, your
name, and a brief description of the program.
Example:
/***********************************************************************
Program Name: ProgramName.java
Programmer's Name: Student Name
Program Description: Describe here what this program will do
***********************************************************************/
How to submit your assignment:
1. The programs MUST have the same names as the assignment title.
2. Each Java source file (*.java) must include a corresponding class file (*.class) program as evidence
of success.
3. In addition to the program source code files and byte code files, put all your program source code
files and screen shots of your program output files into a Word document.
4. You must use a zipped folder to send your weekly assignment to the Dropbox. Do not send
subfolders within your zipped folder. Place ALL of the .java and .class files for the week into the one
zipped folder. The zip folder should be named: CIS355A_YourLastName_iLab_Week4, and this zip folder
will contain all the weekly programming assignments.
i L A B S T E P S

2. STEP 1: InheritanceTest (20 points)
Write a program called InheritanceTest.java to support an inheritance hierarchy for class Point-
Square-Cube. Use Point as the superclass of the hierarchy. Specify the instance variables and methods
for each class. The private variable of Point should be the x-y coordinates. The private data of Square
should be the sideLength. The private data of Cube should be depth. Each class must provide applicable
accessor, mutator, and toString() methods for manipulating private variables of each corresponding class.
In addition, the Square class must provide the area() and perimeter() methods. The Cube must provide
the area() and volume() methods.
Write a program that instantiates objects of your classes, ask the user to enter the value for x, y, and
sideLength, test all instance methods and outputs of each object’s perimeter, area, and volume when
appropriate.
Grading Rubric
InheritanceTest Points Description
Standard header included 1 Must contain program's name, student name, and description of
the program
Program compiles 1 Program does not have any error
Program executes 1 Program runs without any error
Point class created 3 Class contains accessor, mutator, and toString methods
Square class created 3 Class contains accessor, mutator, toString, perimeter, and area
methods
Cube class created 3 Class contains accessor, mutator, toString, area, and volume
methods
InheritanceTest class
created
4 Test class asks user for input of x, y, and sideLength and tests all
instance methods
Correct output is
displayed
4 Test class produces correct output showing all values
corresponding to each object
Subtotal 20
STEP 2: DayGui (10 points)
Write a program called DayGui.java that creates a GUI having the following properties
Object Property Setting
JFrame
Name
Caption
Layout
mainFrame
Messages
FlowLayout
JButton
Name
Caption
Mnemonic
cmdGood
Good
G
JButton
Name
Caption
Mnemonic
cmdBad
Bad
B
Add individual event handlers to your program so that when a user clicks the Good button, the message
"Today is a good day!" appears in a dialog box, and when the Bad button is clicked, the message "I'm
having a bad day today!" is displayed. The following tutorial shows you much of the code solution. Feel

3. free to use the tutorial, but make changes so that you are not simply copying the tutorial code for your
entire solution. To make this different from the tutorial, change the colors of the buttons and panel. Also,
add this application to a tabbed pane along with the program you will complete in the next step, Step 3.
The following tutorials will likely be useful as you work to complete this step:
JTabbedPane
Tutorial to Write Your First GUI
Grading Rubric
DayGui Points Description
Standard header included 1 Must contain program’s name, student name, and
description of the program
Program compiles 1 Program does not have any error
Program executes 1 Program runs without any error
DayGui class created 1 Class DayGui was created which contains the
required properties
cmdGoodJButton created along with
the event handler
1.5 The Good button shows on the application and when
pressed the appropriate message displays on a
separate window
cmdBadJButton created along with
the event handler
1.5 The Bad button shows on the application and when
pressed the appropriate message displays on a
separate window
Application contains required
changes and displays the correct
output
3 Application appears as one of the tabs in a tabbed
application and buttons and panel are in different
colors
Subtotal 10
STEP 3: OfficeAreaCalculator (10 points)
Write a program called OfficeAreaCalculator.java that displays the following prompts using two label
components
Enter the length of the office:
Enter the width of the office:
Have your program accept the user input in two text fields. When a button is clicked, your program
should calculate the area of the office and display the area in a text field with a label of Area. This display
should be cleared whenever the input text fields receive the focus. A second button should be provided to
terminate the application (Exit button).
The following tutorial shows you much of the code solution. Feel free to use the tutorial, but make
changes so that you are not simply copying the tutorial code for your entire solution. To make this
different from the tutorial, change the colors of the panel. Also, add this application to the same tabbed
pane (see the JTabbedPane tutorial) as the application you built in Step 2, the DayGui application.
Office Area Calculator Tutorial
Grading Rubric
OfficeAreaCalculator Points Description
Standard header included 1 Must contain program’s name, student name, and
description of the program

4. Program compiles 1 Program does not have any error
Program executes 1 Program runs without any error
Created Length label and Length
input textbox field
1 The Length label and input textbox show on the
application and users can enter valid numeric value in
the textbox
Created Width label and Width input
textbox field
1 The Width label and input textbox show on the
application and users can enter valid numeric value in
the textbox
Created Area label and Area input
textbox field
1 The Area label and input textbox show on the
application and the area value displays in the textbox
when the Calculate button is pressed
Created Calculate button with the
appropriate handler
1 The Calculate button calculates the area given the
length and width of the office
Created Exit button with the
appropriate handler
1 The Exit button exits the application and terminates
the program
Application contains required
changes and displays the correct
output
2 Application appears as one of the tabs in a tabbed
application and panel is in a different color
Subtotal 10
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