Telling the browser that a new page is coming?

Hi,
if I already wrote some stuff to the client with out.print(), how can I tell the browser that he should "forget" the previous stuff and that now a new html page is coming? (maybe I want to do this under a certain condition).
public void doPost(HttpServletRequest request,HttpServletResponse response)
      throws ServletException, IOException {
     // REPLY
     PrintWriter out = response.getWriter();
     String retHTML = "<html><head><title>Send</title></head>";
     retHTML = retHTML + "<body text=\"#ffffff\" bgcolor=\"#000000\">";
     retHTML = retHTML + "<body text=\"#ffffff\" bgcolor=\"#000000\">";
     retHTML = retHTML + "<table border=\"0\" width=\"100%\" align=\"center\" cellspacing=\"6\">";
     retHTML = retHTML + "<tbody><tr><td align=\"left\" valign=\"top\"><font align=\"center\" color=\"#ffffff\">";
     retHTML = retHTML + "<b>Nachricht:</b></font></td><td valign=\"top\">";
     retHTML = retHTML + "<FORM action=\"http://www.mycgiserver.com/servlet/usul.Chat\" method=\"post\">";
     retHTML = retHTML + "<INPUT name=message><INPUT type=submit value=\"Send\"></FORM></td></tr></tbody></table></body></html>";
     out.println(retHTML);
        // FORGET IT, I WANT TO START ALL OVER
}

Hi,
if I already wrote some stuff to the client with
out.print(), how can I tell the browser that he should
"forget" the previous stuff and that now a new html
page is coming? (maybe I want to do this under a
certain condition).
public void doPost(HttpServletRequest
t request,HttpServletResponse response)
throws ServletException, IOException {
     // REPLY
     PrintWriter out = response.getWriter();
String retHTML =
"<html><head><title>Send</title></head>";
retHTML = retHTML + "<body text=\"#ffffff\"
bgcolor=\"#000000\">";
retHTML = retHTML + "<body text=\"#ffffff\"
bgcolor=\"#000000\">";
retHTML = retHTML + "<table border=\"0\"
width=\"100%\" align=\"center\" cellspacing=\"6\">";
retHTML = retHTML + "<tbody><tr><td align=\"left\"
valign=\"top\"><font align=\"center\"
color=\"#ffffff\">";
retHTML = retHTML + "<b>Nachricht:</b></font></td><td
valign=\"top\">";
retHTML = retHTML + "<FORM
action=\"http://www.mycgiserver.com/servlet/usul.Chat\
method=\"post\">";
retHTML = retHTML + "<INPUT name=message><INPUT
type=submit
value=\"Send\"></FORM></td></tr></tbody></table></body
</html>";
     out.println(retHTML);
// FORGET IT, I WANT TO START ALL OVER
You cant, but fortunately, you havent written anything yet to the client, so you can just empty your retHTML string.
By the way, when you build strings dynamically, you should really use StringBuffer since this is less memory expensive.
Ah hang on, you do have a out.println. Then you cant empty it anymore. Only way to do it, is to parse a bit of javascript function that will start a new request e.g.
out.println("<script>location.href=/webapp/servlet/newRequest");

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