Validator a property java.util.Date is possible??

[Mauricio T. Ferraz]

In my Form a hava a property java.util.Date, I can use the validator Struts?
Or I just can have properties "Strings" ??? in my textfiels on form???
In the Struts' webapps has a example, the use only String to input of
data...

I got

 java.lang.IllegalArgumentException: argument type mismatch


Thanks, for help.