Passing parameters from a Java class to Jsp page

Hi everybody. I'm newbie in using Java class in conjunction with JSP pages. Infact I have a problem. How can I pass the parameters used in a Java class (as UserName, Password, and so on..) to a JSP page? What methods (and classes) I have to use?
Thank you in advance
Have a nice day

It still doesn't work. I write the code
//my java class
package channel_service;
import java.util.Vector;
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2002</p>
* <p>Company: </p>
* @author unascribed
* @version 1.0
public class CallMenu {
private Vector parameters = new Vector();
public void setParameters( String UserId ) {
parameters.add(0, UserId);
//parameters.add(2, Pin);
//parameters.add(3, UserName);
//parameters.add(4, Greeting);
public Vector getParameters() {
return parameters;
//my jsp page
<%@ page import="Channel_Service.src.channel_service.CallMenu" %>
<%@ page import="java.util.Vector" %>
<html>
<head><title>User Menu Page</title></head>
<body>
<center><h1><i><b>This is your personal User Menu page</b></i></h1></center>
<br>
<br>
<center><h2><i>In the list below you'll find all your personal information (as UserID, Password and so on...)
and all the function you have the rights to use</i></h2></center>
<br>
<br>
<table align=center>
<tr>
<%
CallMenu cl = new CallMenu();
cl.setParameters();
Vector params = cl.getParameters();
String UserId = (String)params.elementAt(0);
String Pin = (String)params.elementAt(1);
String UserName = (String)params.elementAt(2);
String Greeting = (String)params.elementAt(3);
%>
<td><h2><b><i>User ID = <%= UserId %></td></tr>
<tr><td><h2><b><i>PIN = <%= Pin %></td></tr>
<tr><td><h2><b><i>User Name = <%= UserName %></td></tr>
<tr><td><h2><b><i>The system says <%= Greeting %></td></tr>
</table>
</body>

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Passing parameters from a Java class to Jsp page

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