Is there class version on java classes?

About javax.servlet.ServletException: Bad version number in .class file
Do you know about that error message?
And how about this ? "java.lang.UnsupportedClassVersionError: Bad version number in .class file"
It happened when I sent a message from html page to jsp page which is using java beans.
what do you think is wrong?
Are there class version?
Edited by: dewyone on Dec 28, 2007 1:31 PM

dewyone wrote:
About javax.servlet.ServletException: Bad version number in .class file
Do you know about that error message?
And how about this ? "java.lang.UnsupportedClassVersionError: Bad version number in .class file"
It happened when I sent a message from html page to jsp page which is using java beans.
what do you think is wrong?Usually means you're trying to run code that was compiled under a later JVM on a version that's older.
Recompile the code on a JVM that matches the one you'll run on.
Are there class version?Yes, as you can see.
%

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