Thread: JAva GUI Help needed. Please Help

Can somebody please show what the rest of this code should look like. I have the GUI so far, but need help with the rest. Here is the Link to my code and the question to the problem is below.
CarService - Pastebin.com

RapidLube is a fast growing franchise that offers tremendous value for customers
needing automotive maintenance services. Their current price list inclusive of all taxes
(in USD) is as follows:
Oil Change:
•Natural : 19.95
•Blend: 39.95
•Synthetic: 49.95
Tire Rotation: 60.00
Muffler Replacement: 225.00
Transmission Flush: 65.00
Radiator Flush: 35.00
In order to reward regular customers, the chain also offers a 10% discount off the total
price.
You are tasked with creating a GUI application (RapidLubeUI) to be used at their
Point of Sale (POS) terminals with the following suggested specifications.
The main application will open with a window as shown below with minimum size of
600x200 pixels. Note the use of banner at the top and the buttons at the bottom. The main
work area consists of sections: one for customer info, another for oil change and the third
for maintenance services offered by Rapid Lube.
The customer may optionally pick at most one type of oil change. However, a particular
job may contain of any combination of maintenance items like Tire Rotation,
Transmission Flush etc.
The user interface will provide a quick way to estimate the total for a job. Clicking on the
estimate button should bring up a dialog as follows detailing the estimated costs.
A regular customer discount of 10% must be offered if the Regular Customer item is
checked.
The customer name cannot be empty for checkout. When the customer checks out,
clicking on the checkout button will log the job (append data line) to a file named
SalesLog.txt with following information: Timestamp, customer name and total
amount as shown below.
2010-Nov-29 08:45:31 AM, John Doe, 244.95
Clicking on the exit button exits the application.
NOTES:
1. All dollar amounts presented should be restricted to two decimal places.
2. Use of automated UI generating wizards is prohibited for this assignment
3. You can use multiple classes as a project. In this case make sure you submit all
project files in a single jar file.

Sorry, we don't do student's homework here. If you have any specific questions about your design or about your current code, post it here.

Lot of bored programmers hanging around here.
Don't you guys have jobs and work to do?
Do your bosses know your spending time on these forums?

Where do you get a premium account?

Try this:

JFrame jf = new JFrame();

jf.setMinimumSize(new Dimension(600, 200));

As for the rest, start some code and I might be able to help you more.