I've set the CLASSPATH, but I still get a noClassDefFoundError. (Java)

Travis86 · 02-04-2004, 02:23 PM

I'm having trouble with my latest Java project. I've compiled other Java programs before, but I'm using packages in my latest program, and I've never done that before.

First, I set the CLASSPATH to ".:.\view\:.\model\" because I've got other classes in the "view" and "model" directories. (I put backslashes in the classpath because I'm using Windows to do this.)

I can compile all of my files, but when I go to run the program, it says 'Exception in thread "main" java.lang.NoClassDefFoundError: pc' (pc is the name of the main class).

Why won't this work?

vous · 02-04-2004, 03:12 PM

Dude, I'm confused... You have a CLASSPATH problem in Windows or in Linux? If it is Linux, send us the output of:

$env

and then the location of the files...we'll have you ready in no time.

Travis86 · 02-04-2004, 04:42 PM

Um.... You mean it matters? I thought Java was the same on either platform. So, do you think this is a Windows problem or a Java problem?

And what is $env, anyway? I did a bit of searching on Google and I couldn't find anything about it. I would assume it has something to do with the environment, right?

oulevon · 02-04-2004, 06:37 PM

type this at the prompt:

echo $CLASSPATH

and then let us know the output, and where you've installed java, and the path to your packages.

Travis86 · 02-04-2004, 09:06 PM

The default value of the CLASSPATH is c:\PJAVA, but I've been overwriting it. I never knew that it had a default value until now. All that is in PJAVA is a file called error.log.

Java is installed in "c:\j2sdk1.4.2_02\".

The classes are in:
c:\WINODWS\Desktop\Travis\Java\window thing\ym\
c:\WINODWS\Desktop\Travis\Java\window thing\ym\view\
c:\WINODWS\Desktop\Travis\Java\window thing\ym\model\

deiussum · 02-05-2004, 09:33 AM

A couple of other pieces of information may be needed.

Which directory are you actually in when you try to execute them?
What packages are your classes in, and are they in the same directory structure as the package structure?
What are you overwriting CLASSPATH to?
What parameters are you passing to Java?

Travis86 · 02-05-2004, 10:09 AM

Which directory are you actually in when you try to execute them?
c:\WINODWS\Desktop\Travis\Java\window thing\ym\

What packages are your classes in, and are they in the same directory structure as the package structure?
pc.class (the main one) is in ym. The classes in .\model\ and .\view\ are members of ym.model and ym.view, respectively.

What are you overwriting CLASSPATH to?
".:.\model\:.\view\"

What parameters are you passing to Java?
none

Hope that sheds some light on the issue.