Generating logs w/Log4J in ActionClass

[Kapadia Mitesh-C23457]

I have the appropriate configurations completed to use Log4J w/Tomcat. 
However, how would I invoke Log4J from within my action class to generate
DEBUG statements? 
I have the following package imported: 
import org.apache.log4j.*; 
Any examples would be most appreciated. 
Thanks in advance. 
- Mitesh