java data mining

[rwfields]

Hello,

I am looking for a Java package that will do clustering for me. I have
found the Java Data Mining (JDM) standard, for developing data mining
applications and tools.

Independent of this standardization effort, there are freely available
open source software systems for data mining available that were
implemented in Java (WEKA, YALE, AIDA).

My question is, are there any freely available packages that support
the JDM API; and specifically do clustering? Has anyone had a chance
to compare tools? And of course, what is easy to use?

Thanks,
Randall