public service method

Question : What is written inside the public service method?

Ans : The public service method converts the ServletRequest object into the HttpServletRequest type and ServletResponse object into the HttpServletResponse type. Then, calls the service method passing these objects. Let's see the internal code:

1.     public void service(ServletRequest req, ServletResponse res)  

2.             throws ServletException, IOException  

3.         {  

4.             HttpServletRequest request;  

5.             HttpServletResponse response;  

6.             try  

7.             {  

8.                 request = (HttpServletRequest)req;  

9.                 response = (HttpServletResponse)res;  

10.           }  

11.           catch(ClassCastException e)  

12.           {  

13.               throw new ServletException("non-HTTP request or response");  

14.           }  

15.           service(request, response);  

16.       }  

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