commons-logging

[Alex Kravets]

Couple of question about logging in Struts.
I included commons-logging.jar in my classpath, imported Log and 
LogFactory in my class and have the following:

public final class ExecuteQueryForm extends ActionForm {
      private static Log log = LogFactory.getLog(ExecuteQueryForm.class);
public void setSQLQuery(String query) {
        log.debug("test");
       try{
               this.SQLQuery = query;
       }
       catch(NumberFormatException nfe){
               ActionErrors errors = new ActionErrors();
               errors.add("password", new 
ActionError("error.password.required"));

       }
   }
....
....
Now, is this suppose to write test in my 
/export/home/$TOMCAT/bin/Catalina.out file or somewhere else?
When I referenced commons-logging.jar in my classpath do I user log4j by 
default?
Do I need to perform any other configurations to user logging in my 
applications?

While I am here, the errors that I send in try/catch block is this the 
correct way to do it, because as of this implentation ActionForm does 
not seem to catch NumberFormatException (I use SQLQuery as a number for 
now...)

thanks,
Alex