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

public class Shuffle extends HttpServlet {

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

    response.setContentType("text/html");

    PrintWriter out = response.getWriter();

 String message = request.getParameter("message"), anotherMessage = ""; 
 if (message == null) message = ""; 
 java.util.StringTokenizer st = new java.util.StringTokenizer(message); 
 if (st.hasMoreTokens()) {

  String first = st.nextToken(); 

  message = ""; 
  while (st.hasMoreTokens()) {
    message += " " + st.nextToken(); 
  }
 
  anotherMessage = "You are looking at: " + first; 

 } else { // initialize 

   String[] a = {"one", "two", "three", "four", "five", "six"};

   for (int n = 0; n < 1000; n++) {
     int i = (int) (Math.random() * a.length); 
     int j = (int) (Math.random() * a.length); 
     String temp = a[i]; 
     a[i] = a[j]; 
     a[j] = temp; 
   } 

   anotherMessage = "The game has just (re)started. The deck is shuffled."; 

   message = a[0]; 
   for (int i = 1; i < a.length; i++) {
     message += " " + a[i]; 
   } 

 } 

out.println(

"  This is the servlet, not the jsp. <p> <form> \n" + 
"    " + anotherMessage + " <p> \n" + 
"    Current list: (" + message + ") <p> \n" + 
"    <input type=\"submit\" value=\"Proceed\"> \n" + 
"    <input type=\"hidden\" name=\"message\" value=\"" + message + "\"> \n" + 
"  </form> " 

); 

} // doGet

} // class Shuffle