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methods dispatch action

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can i write our own methods in our own action extends dispatch action just like cancel,update,reset with the normal signature as follows.

public class MyDispatchAction extends DispatchAction{
public ActionForward methodName(ActionMapping mapping,ActionForward forward,ServletRequest req,ServletResponse res){
with out writing execute method.and also can i write them in direct sublass of Action can this fulfill my condition as DispatchAction do
and also one more doubt
does the container creates object to DispatchAction or MyDispachAction or Action and there by calling methods.if it creates object to MyDipatchAction and refered by DispatchAction identifier.I think this is related to core java.please explain me i am in confusion.
thanks for your anticipation
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