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azambuja
Apprentice
Joined: 12 Jul 2002
Posts: 257
Location: Porto Alegre, RS, Brazil
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 Posted: Sat Jan 04, 2003 2:16 am Post subject: error "running" java programs |
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hello,
ive got two java sdks emerged, blackdown and sun...
with any of them when i try to compile a .java class(which i know it has correct code) they compile fine, but when i run them (everyone of them) i get this error:
| Code: | | Exception in thread "main" java.lang.NoClassDefFoundError: |
i guess theres something to configure, or something like this...
thanx/cheers
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"Slip inside the eye of your mind, don't you know you might find, a better place to play" |
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red_over_blue
Guru
Joined: 16 Dec 2002
Posts: 310
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| Posted: Sat Jan 04, 2003 2:25 am Post subject: |
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Can you post the commands you are using?
A common mistake is the following... suppose you have a java program called program.java
You compile it by issuing:
Which is perfectly fine. But then, some people try to run it by typing:
When you should only do the following:
I'm not sure if this is what is happening in your case, but sounds like it might be a possibility. |
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zhenlin
Veteran
Joined: 09 Nov 2002
Posts: 1361
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| Posted: Sat Jan 04, 2003 2:50 am Post subject: |
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Make sure . is in CLASSPATH.
Also, if <class> is in <package>, execute it as <package>.<class> from the appropriate directory. |
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azambuja
Apprentice
Joined: 12 Jul 2002
Posts: 257
Location: Porto Alegre, RS, Brazil
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| Posted: Sat Jan 04, 2003 4:52 pm Post subject: |
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red_over_blue : thats definately not the problem, im not that dumb 
zhenlin : how do i add . to the classpath (im 90% sure that this is the problem)...
thanks for the help guys!
cheers
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"Slip inside the eye of your mind, don't you know you might find, a better place to play" |
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Valen
Apprentice
Joined: 18 Aug 2002
Posts: 197
Location: Toronto, Ontario, Canada
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| Posted: Sat Jan 04, 2003 10:55 pm Post subject: |
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in /etc/profile.env you will see a setting for the CLASSPATH variable just change if from something like:
| Code: | | export CLASSPATH='/opt/sun-jdk-1.4.1.01/jre/lib/rt.jar' |
and add a ':.' like:
| Code: | | export CLASSPATH='/opt/sun-jdk-1.4.1.01/jre/lib/rt.jar:.' |
you will need to 'source /etc/profile' afterwards. You can also use the 'java-config' tool if you want (it does the same thing if you choose set-system-vm AFAIK).
EDIT: I just reread your original message, you may want to use java-config if you have different users using different JVMs. If you don't then I believe either solution will still work correctly. |
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