Designing Java Apps for Users Without a JRE Installed Yet

Hi, sorry if this post is in the wrong place, but here goes:
I'm designing a Swing Java application for a client. My client intends to distribute/sell this application.
I'm concerned because, chances are that at least one of the people he distributes this application to will not have the JRE installed and will thus be unable to run the application.
Can anyone give me some suggestions on ways I can make my application more convenient for users without the JRE currently installed? Even some kind of error message that would direct the user to the JRE download site would be okay.
kwikness
Edited by: kwikness on Dec 2, 2009 5:56 PM

Use NSIS and package your application with JRE.
Add your jar files to lib/ext of the JRE package.
NSIS can create a short cut (desktop/start menu) to launch java class/jar file
I would not use webstart unless you are sure that clients will have access to the internet, the bandwidth is not an issue and installing the new JRE is allowed (permissions, SLA, etc.)
Best regards.

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Yikes, there is a much better way to go about this that is probably within what you have already learned, but since you are a student and this is how you started, let's just concentrate on fixing what you got.
First, as already noted by another poster, your formatting is really bad. Formatting is really important because it makes the code much more readable for you and anyone who comes along to help you or use your code. And I second that posters comment that brackets should always be used, especially for beginner programmers. Unfortunately beginner programmers often get stuck thinking that less lines of code equals better program, this is not true; even though better programmers often use far less lines of code.
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