java code for Error code

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Sender extends HttpServlet {

public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {

/*
* if the servlet tries to access a resource and finds out that the
* client is not authorized to access it - "401 Unauthorized"
*/
//response.sendError(401,"You are not authorized to view the requested
// component");
/*
* if the servlet tries to access a resource that is forbidden for this
* client and there is no further information on it - "403 Forbidden"
*/
response.sendError(403);

/*
* if the servlet tries to access a resource that is not found given the
* client's provided URL - "404 Not Found"
*/
//response.sendError(404);
}

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {

doPost(request, response);
}
}