What is the ActionForm? What are the important methods of ActionForm ?

ActionForm is java bean which represents the form inputs containing the request parameters from the view referencing the Action bean.

The important methods of ActionForm are : validate() and reset()

validate() 

• validate properties after they have been populated
• called before FormBean is handed to Action and returns a collection of ActionError as ActionErrors
• Syntax
  public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) { }

reset() 

• called with each request that uses ActionForm
• reset all data members of ActionForm prior to the new request values being set
• Syntax
  public void reset() { }