What is the difference between Struts 1.0 and Struts

The main differences are
1. In Action class Perform() method was replaced by execute() method.
2. DynaActionForms are added.
3. Tiles Concept is introduced.
4. We can write our own Controller by Inheriting RequestProcessor class. i.e., nothing but we can override the process() method of the RequestProcessor class.
Apart from these some updates in web.xml and Struts-Config.xml.