DynaValidatorForm and Checkbox

[Scott Purcell]

I have a couple of jsp pages where there is a single checkbox on the page.
 
I would like to create a DynaValidatorForm with a single element in it (the 
checkbox). Then in the action, run a query, if the database says to turn it on, 
then I would like to set it to true (X) or else show a unchecked checkbox on my 
page.
 
But as a newbie, I am not sure what type in the creation to make it? A String? 
A Boolean? 
 
Could someone give me some advice?
 
Thanks,
Scott