what is called? service method or doGet method?

[Ankur Jain Kothari]

When i read the book head first i thought that the service method calls the doGet method..but when i ran the program the service method never ran...why is it so?

[Ulf Dittmer]

The service method does indeed call the doGet method for a GET request. What is "the program" that led you to believe otherwise?

[Ankur Jain Kothari]

 /*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */


import java.io.IOException;
import java.io.*;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author CharlieAnna
 */
public class NewServlet extends HttpServlet {
static{
    System.out.println("inside static");
}
    public NewServlet() {
        System.out.println("inside constructor");
    }
   
   public void init()
   {
   System.out.println("inside init");
   }
    public void destroy()
   {
   System.out.println("inside destroy");
   }
    public void service()
    {
    System.out.println("e");
    }
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
     {
     try{
       PrintWriter writer = response.getWriter();
       writer.print("ewfewf");

    } 
    
    catch(Exception e)
    {
    e.printStackTrace();
    }
    }
    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
        System.out.println("inside doGet");
    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
   

[Ankur Jain Kothari]

ok sorry..wrong service method used..

   public void service(HttpServletRequest request, HttpServletResponse response)
    {
        try{
       PrintWriter writer = response.getWriter();
       writer.print("ewfewf");

    }

    catch(Exception e)
    {
    e.printStackTrace();
    }
    System.out.println("e");
    }  

with this code the service method ran and then called doGet method

Thanks

[Ankur Jain Kothari]

this is the text from hanumant deshmukh...is this right?

If you override the service methods in your servlet class, you will lose the
functionality provided by the HttpServlet class, and the doXXX()
methods will not be called automatically. In your implementation, you will
have to determine the HTTP method used in the request, and then you will
have to call the appropriate doXXX() method yourself. For this reason, it’s
recommended to only override the doPost() or doGet() methods.

but in the code of the earlier post doGet was called even though i didnt call doGet from service method....can anyone explain please

[Ankur Jain Kothari]

i am so confused..sometimes service calls doGet even though i didnt call doGet from it...and other times it does....something is wrong with my netbeans

[Ravinderjit Singh]

If you code service method like this in your servlet

public void service()

then the method implemented by HttpServlet class will be called.

You can review the service method of this HttpServlet class; line number 607 here

If you code service method like this

public void service(HttpServletRequest request, HttpServletResponse response)

then you need to call doXXX() explicitly.

[Ulf Dittmer]

... which is why using the @Override annotation can be a life-saver :-)