How do i use wekas classes in my own code

It's not that hard to use WEKA classes in your own code, the following articles give a good overview of how to do that:

• Use WEKA in your Java code
• In general, the articles tagged as "source code".

Further resources:

• Check out the chapter Using the API in the Weka manual (snapshots later than 09/08/2009 and releases >3.6.1 and >3.7.0).
• The Weka Examples collection is a an ANT project that is available through snapshots and releases later than 09/08/2009, containing a lot of example classes.

Note: WEKA is open-source software under the GNU General Public License, which means that your code has to be licensed under the GPL as well.