Debug Solr in Netbeans..

[noor]

hi, 
i am new to apache solr.
i got the solr source code, and i created my own (custom) classes.
Also, i make the request reference to that newly created classes in 
solr-config.xml.

now i need to debug my code, when the solr search calls my class..
So, for this, i dont know how to debug my code....?

Please anybody help me to achieve this.

thanks and regards,
Noor