Why do we Typecast FormBean object with ActionForm in execute(...,...,...,..) method in Struts?

Public ActionForward execute(ActionMapping am,ActionForm af,Req,Res)
{
Myfornbean mf=(Myformbean)af;
//why we are typrcasting here

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sivaram

Jan 12th, 2012

We define our form bean by extending ActionForm or DynaActionForm.
In execute() method, we are getting the ActionForm object and to get the form values we need to get our form bean object. So it is must to type cast it.
Please correct if Im wrong.