Tomcat copies .class files from outside its classpath to work dir - ???.

I posted this question here in March but got no replies. Here goes again:
Hello:
I've found that Tomcat has copies of some (but not all) of my
class files in a directory unde the work dir. These are
classes that were created by me for use in my web apps (
although they are not web-specific). The time stamps on the files
vary, and they are usually not the most recent versions.
I came across this when I encountered a strange error where one
of my jsp pages wouldn't compile. A constant in one of my
classes could not be accessed in the page. It looked like a
package naming error ("Class thingy really contains class
foo.bar.thingy"), but the class was in the right place with the
right name. I decided to look for other copies of the class on
the disk, and found the classes in tomcat's work dir. In the
end, providing the fully qualified class name solved the
first problem, but left me wondering why some of my classes had
been copied.
Can anyone tell me why Tomcat would copy these files?
Thanks,
Pat Reaney

I have a context called "roc"
under the root in tomcat, and in the
work\localhost_8080%2Froc directory there is a
"com\roc\fame" directory with a single class in it
that is a copy of the class that already exists in
c:\java\com\roc\fame. c:\java is in my classpath, and
I keep all my non-tomcat specific code there, so
evidently tomcat copied the class to its own work
dir.Ahhhh! OK - so the class files are copied from outside %TOMCAT_HOME%... that makes a little more sense (although still not much!!) I'm guessing this has something to do with the whole WAR file thing... since Tomcat is becoming more geared toward serving up apps that are deployed to it as WAR files, typically all the class files would be found under webapps/yourContextRoot/WEB-INF/classes - so maybe if they're elsewhere, Tomcat has its own sinister reasons for copying them to the work directory... (see leukbr's list above)

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