Sharing static members between Swing application and Web application

Hi,
if someone has done this please help:
I have created 3 classes:
Mainclass using JFrame which is used as host class for DBConnectionManager class,
and ConfigBean class used for storing static configuration parameters:
 static public String strUser = "";
static public String strPassword = "";
static public String strDB = "";
static public int nMaxConn = 0;
static public String strPoolName = "";
static public boolean bConnected = false;
static public int nCurrentUsers = 0;
static public DBConnectionManager manager = null;
 public DBConnectionManager getDBManager()
return this.manager;
public void setDBManager(DBConnectionManager manager)
this.manager = manager;
DBConnectionManager class uses static instance to see if this is only class created by client users.
Only static member in this class is getInstance member function for startig manager:
 static synchronized public DBConnectionManager getInstance()
if (instance == null)
instance = new DBConnectionManager();
return instance;
In Mainclass I also created non static DBConnectionManager class for manipluation with host administrator.
Then I created web application layout in Tomcat 4 and used index.jsp:
<%@ page import="java.sql.*,java.io.*" %>
<jsp:useBean id="cfgbean" class="webvobapli.ConfigBean" scope="application" />
<%!
webvobapli.DBConnectionManager db = null;
String strMessage = "";
Statement stmt1;
ResultSet rset1;
String strQuery = "select count(*) from cards";
%>
<html>
<%
 try
 db = cfgbean.getDBManager();
 if(db==null)
 strMessage = "Error";
 else
 Connection con = db.getConnection("central2");
 if(con != null)
 stmt1 = con.createStatement();
 rset1 = stmt1.executeQuery(strQuery);
 rset1.next();
 strMessage = rset1.getString(1);
 else
 strMessage = "NULL";
 catch(Exception e)
 strMessage = e.toString();
%>
Message = <%=strMessage%>
</html>
Question: why db = cfgbean.getDBManager(); returns null if I created instance of DBConnectionManager
class in Mainclass and assigned it to ConfigBean as static instance before running web application.
Shouldn't all java programs share static memory area?
Beast Regards
Branislav Cavlin

Question: why db = cfgbean.getDBManager(); returns null if I created >>instance of DBConnectionManager
class in Mainclass and assigned it to ConfigBean as static instance >>before running web application.
Shouldn't all java programs share static memory area?You say you create the db objects BEFORE you run the web application - now I could be misunderstanding what you are saying, but does this not involve two JVM's (one to create initial db objects, which then exits, then second JVM fires you app server/servlet container) - which would explain why a null object is being returned.

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