I keep getting a ClassCastException during runtime in one of my Action
classes. This is a runtime error, but it compiles cleanly. In my
application framework, I have defined a class named ListActionForm
that extends the ActionForm. I extend the ListActionForm with a
class named CustomerListActionForm. The perform method is defined in
the required fashion as seen below:
public ActionForward perform(ActionMapping mapping,
ActionForm form, HttpServletRequest request,
HttpServletResponse response) throws IOException,
ServletException { ...
The rutime error occurs on the following line of code in the
ActionClass:
CustomerListActionForm listForm = (CustomerListActionForm) form;
The error is:
- java.lang.ClassCastException: form.ListActionForm
I have coded Action clasess countless times, but the form handlerI use
has always been a direct
descendant of the ActionForm. Considering that the
CustomerListActionFOrm is still an
instance of ActionForm, why does this ClassCastException keep getting
thrown?
Pete Serafin
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