Program Assignment 1: Event-Driven Programming

Page 1

Points: 100 points
Objectives: To practice event-driven programming using Java-based GUIs. To refresh your basic
Java skills.
Description: Develop a Java program that creates a standalone GUI application (not an applet) that
simulates an e-store which allows the user to add items (books) to a shopping cart and once all
items are included, total all costs (including tax), produces an invoice, and append a transaction log
file.
Your program development must include the following steps:
1. Create a main GUI containing the following components:
a. An area that allows the user to input data into the application along with the
descriptive text that describes each input area.
b. A total of six buttons as shown below with functionality as described below.
c. As illustrated below, the various buttons on the interface are only accessible at
certain points during a user’s interaction with the e-store.
2. An input file named “inventory.txt”. This is a comma separated file which contains
the data that will be read by the application when the user makes a selection. A sample file
is provided for you on WebCourses.
3. An output file (append only) named “transactions.txt” must be created that uniquely
logs each user transaction with the e-store. The unique transaction id will be generated as a
permutation of the date/time string when the transaction occurred.
Restrictions:
Your source file shall begin with comments containing the following information:
/* Name: <your name goes here
Course: CNT 4714 – Fall 2017
Assignment title: Program 1 – Event-driven Programming
Date: Sunday September 10, 2017
*/
Input Specification: The file “inventory.txt” as described above (see example below as
well).
Output Specification: Output is to appear in the specified components of the GUI and various
message boxes that appear, plus the contents of the
“transactions.txt” log file that will be generated.
Deliverables:
(1) Submit a working copy of your source code (all .java files) via WebCourses no later than
11:59pm Sunday September 10, 2017.
CNT 4714 – Programming Assignment #1 – Fall 2017Page 2
(2) Include a file that contains screen shots, similar to those illustrated below, that shows your
application in action as a user interacts with your e-store to purchase books.
(3) Include a screen shot of your “transactions.txt” file showing at least the last few
transactions (similar to the one shown on the last page of this document).
Additional Information:
Shown below are example screen shots of the GUI to help illustrate how your application is to
operate.
1. Screen shot of the contents of an example “inventory.txt” file.Page 3
2. Initial GUI:
3. GUI after user specifies total number of items in the order and makes a selection for item #1.
Note that these
buttons are not
initially “active”.
Allows for
processing an
item once it is
selected.
Confirms that
the item is
correct.
View the
order so far.
Completes
an order –
generates
invoice and
adds to
transaction
file.
Clears
order and
starts over.
Quit!Page 4
4. GUI after user has selected the first item and clicked the “Process Item #1” button.
5. When the user clicks on the “Confirm Item #1” button, a confirmation information message
appears on the screen.
Note that the “Confirm
Item #1” button is now
active and the “Process
Item #1” button is inactive.
Information on the book
purchased has been
extracted from the
inventory file and written
into the window on the
line for item #1.
User entered an incorrect
book ID. This message
would be displayed when
user preseed the Process
Item button.Page 5
6. The main GUI after the user has confirmed the first item.
7. User enters next item in the order.
Information
for previous
item remains
on display.
Subtotal should
reflect current
total of all
confirmed items.
Note that the text areas
for entering the second
item information are
cleared and ready for
input.
Discount is
1-4 = 0%
5-9 = 10%
10-14 = 15%
Note that =15 = 20%
the button
changes
number.Page 6
8. The GUI after the user has entered the information for all the items and confirmed the last item.
9. When the user clicks the “View Order” button, the following message box should appear.Page 7
10. When the user clicks the “Finish Order” button, the invoice message should be generated and
displayed.
11. The transaction file after order shown above was finished. Note the unique transaction ids
based on the date and time.
The last transaction occurred on
8/21/2017 at 15:09:08 pm. See the
invoice message above. Permutation
is: YYMMDDHHMMSS.
The date and time are used
to create the unique
transaction id in the
“transactions.txt” file.
Format is “DD/MM/YY
HH:MM:SS TMZ”Page 8
12. The transaction file after several orders have been completed. Note the unique transaction
ids based on the date and time for every separate transaction.Page 9