java code for Servlet: simple session

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

public class SimpleSession extends HttpServlet {

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

response.setContentType("text/html");
java.io.PrintWriter out = response.getWriter();
HttpSession session = request.getSession();

out.println("");
out.println("");
out.println("");
out.println("");
out.println("");

out.println("

Session Info

");
out.println("session Id: " + session.getId() + "

");
out.println("The SESSION TIMEOUT period is "
+ session.getMaxInactiveInterval() + " seconds.

");
out.println("Now changing it to 20 minutes.

");
session.setMaxInactiveInterval(20 * 60);
out.println("The SESSION TIMEOUT period is now "
+ session.getMaxInactiveInterval() + " seconds.");

out.println("");
out.println("");

}

/**
* Handles the HTTP POST method.
*
* @param request
* servlet request
* @param response
* servlet response
*/
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException,
java.io.IOException {

doGet(request, response);
}

}