look for /usr/java/
Code:
[don@localhost ~]$ locate *java
/home/don/.java
/home/don/.openoffice/user/temp/java
/etc/.java
/usr/share/doc/libidn11-0.5.13/contrib/java
/usr/share/doc/libidn11-0.5.13/contrib/java/ExampleIDNA.java
/usr/share/doc/libidn11-0.5.13/contrib/java/IDNA.java
/usr/share/apps/kjava
/usr/java
/usr/java/jre1.5.0_02/bin/java
[don@localhost ~]$
-mind you, that was installed by me from Sun's website download, not Mandrake packaged rpm.