java code for Client auto refresh

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 AutoServlet extends HttpServlet {

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

//client browser will request the page every 60 seconds
HttpSession session = request.getSession();
Long times = (Long) session.getAttribute("times");
if (times == null)
session.setAttribute("times", new Long(0));
long temp = 1;
if (times != null)
temp = (times.longValue()) + 1;

if (temp < 5)
response.addHeader("Refresh", "15");

response.setContentType("text/html");
java.io.PrintWriter out = response.getWriter();
out.println("");

//More HTML or dynamic content
out.println("You've viewed this page " + temp + " times.");
session.setAttribute("times", new Long(temp));
out.println("");

} //end doGet
}