Get Remote User and display welcome message : Request « Servlet « Java Tutorial

import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;

public class MyServlet extends HttpServlet {

  Hashtable accesses = new Hashtable();

  public void doGet(HttpServletRequest req, HttpServletResponse res)
                               throws ServletException, IOException {
    PrintWriter out = res.getWriter();

    String remoteUser = req.getRemoteUser();

    if (remoteUser == null) {
    else {
      out.println("Welcome, " + remoteUser + "!");
      Date lastAccess = (Date) accesses.get(remoteUser);
      if (lastAccess == null) {
        out.println("This is your first visit!");
      else {
        out.println("Your last visit was " + accesses.get(remoteUser));

      if (remoteUser.equals("YourFirendName")) {
        out.println("Shall we play a game?");

      accesses.put(remoteUser, new Date());
<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"


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25.12.1.Print Request Headers for a Servlet
25.12.2.Get Servlet Request Parameter
25.12.3.Get Remote User and display welcome message
25.12.4.Get Users IP Address
25.12.5.Get Remote Host from Servlet Request
25.12.6.Request parsing and encoding utility methods