Java execution error!!

[nitish_mythology]

I have been writing simple java console programs since a long time. Now when I started workig in my dad's laptop , i am unable to execute the programs.
After successful compilation an error flashes---
Exception in thread "main" java.lang.noClassDefFounderror :file name

WHY IS THIS ERROR CAUSED ?? HOW TO TROUBLESHOOT IT??

[sakumar79]

See http://www.jguru.com/faq/view.jsp?EID=455768

It means that your classpath is not set correctly. Make sure your JAVA_HOME is set up right before you run the tomcat or startup scripts. More links available at above site

Arun

[QwertyManiac]

This also happens if you make a mistake in the proggie's class and filenames...

[nitish_mythology]

@JGuru---
Thnks for your P.M. I thought you will be busy and it will take you some time to reply, hence I posted the topic on forum.