Nope... It will most likely vary based on the VM and platform you are using.
For instance, on my Gentoo Linux box it is
in /opt/blackdown-jdk-1.4.2_rc1/jre/lib/i386/. I believe that (don't quote
me on this) the Sun RPM for Redhat linux puts links to the libraries
in /usr/lib/, and puts the actual libraries somewhere
under /usr/sun-jdk-1.4.2/. I suspect that everything you need can be found
in %JAVA_HOME%\jre\lib\i386 on Windows, but I don't currently have access to
a windows box to verify that.