Re: Swing error :Exception in thread "main" java.lang.NoClassDefFoundError

From:

Knute Johnson <nospam@rabbitbrush.frazmtn.com>

Newsgroups:

comp.lang.java.help

Date:

Sat, 17 Nov 2007 09:47:30 -0800

Message-ID:

<TOF%i.92$sM1.51@newsfe16.lga>

pdlemper@earthlink.net wrote:

Am trying to learn. From Schlidt's Java A Beginners Guide entered
Swing program SwingDemo p 567 and seperately ButtonDemo p 574.
Both compiled. But runing both gave same error message :
Exception in thread "main" java.lang.NoClassDefFoundError
Both do have a class definition.
Am using JDK6 downloaded 6 weeks ago onto new Dell with XP.
Only problem I had with setup is classpath. Am storing source files
and compiling/running from bin directory.
Thanks for any help to this frustrating problem. Dave WB3DWE

On XP when you load the JDK you need to add the JDK\bin directory to the
PATH. Also, DO NOT SET A CLASSPATH!

Your problem can be that CLASSPATH or something else. You need to show
us the code for a simple program that can be compiled and your commands
to compile and run it.

This is one of the most common questions that come to this list.
Unfortunately Sun doesn't provide good instructions on setup anywhere.
Actually, I'm not sure why the install program can't set the PATH but it
doesn't.

--

Knute Johnson
email s/nospam/knute/