create array of html image objects for java servlet -


my goal create array store several images, display each time hit next/prev button on webpage.

so far have don't know if initializing correctly images not appear in browser

import javax.servlet.http.*; import javax.servlet.*; import java.io.*; import java.sql.*; import java.io.*; import java.util.*;  public class hitservlet extends httpservlet {   private int mcount;    public void doget(httpservletrequest request,       httpservletresponse response)       throws servletexception, ioexception {     // set response content type         response.setcontenttype("text/html");        printwriter out = response.getwriter();       out.println("<html>\n" +                 "<body>\n" +                 "<form action=\"/midp/hits\" method=\"post\">\n" +                 "first name: <input type=\"text\" name=\"first_name\">\n"   +                 "<br />\n" +                 "last name: <input type=\"text\" name=\"last_name\" />\n"   +                 "<input type=\"submit\" value=\"submit\" />\n"                 +                 "</form>\n</body>\n</html\n");     } // method handle post method request.   public void dopost(httpservletrequest request,                      httpservletresponse response)       throws servletexception, ioexception {       printwriter out = response.getwriter();       response.setcontenttype("text/html");        string title = "using post method read form data";     string [] images = new string[3];      images[0] = "<img src=\"images/cute.jpg\" alt=\"cat\">";     images[1] = "<img src=\"images/dog.jpg\" alt=\"dog\">";     images[2] = "<img src=\"images/koala.jpg\" alt=\"koala\">";      random rand = new random();     int index =   rand.nextint(images.length);         string doctype =       "<!doctype html public \"-//w3c//dtd html 4.0 " +       "transitional//en\">\n";       out.println(doctype +                 "<html>\n" +                 "<head><title>" + title +  "</title></head>\n" +                 "<body bgcolor=\"#f0f0f0\">\n" +                 "<h1 align=\"center\">" + title + "</h1>\n" +                 "<ul>\n" +                 "  <li><b>first name</b>: "                 + request.getparameter("first_name") + "\n" +                 "  <li><b>last name</b>: "                 + request.getparameter("last_name") + "\n" +                 "</ul>\n" +                   images[index] + "\n" +                  "<form action=\"/midp/hits\" method=\"post\">\n" +                   "<input type=\"submit\" value=\"previous\" id=\"prevbtn\" />" + "\n" +                   "<button  id=\"nextbtn\" >next</button>" + "\n" +                 "</form></body></html>");   }  }

web.xml

<?xml version="1.0" encoding="iso-8859-1"?> <!doctype web-app public "-//sun microsystems, inc.//dtd web application 2.3//en" "http://java.sun.com/dtd/web-app_2_3.dtd"> <web-app> <servlet> <servlet-name>bob</servlet-name> <servlet-class>hitservlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>bob</servlet-name> <url-pattern>/hits</url-pattern> </servlet-mapping> </web-app>

the end goal call rand() function on array every time hit next or previous button. or suggestions appreciated!


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