Problem when using Collection in struts

Question

Hai
I am using the collction classes like Vector, ArrayList to store details from database and then i assigned that as a session attribute and then i use that to display values in jsp. But at compilation time it displays the following message.
Note: DatabaseOperation.java uses unchecked of unsafe opertaions.
Note: Recompile with -Xlint: unchecked for details
Here DatabaseOperation is a java file in which i am using the following method.
public ArrayList dbSelectServerDetails(String serverName)
                   ArrayList serverList=new ArrayList();
     try
     st=con.createStatement();
     rs=st.executeQuery("Select * from cx_server where server_name='"+serverName+"'");
     while(rs.next())
     serverList.add(rs.getString(1));
     serverList.add(rs.getString(2));
     serverList.add(rs.getString(3));
     catch(Exception e)
     System.out.println("Error in dbSelectServerDetails : "+e);
     return serverList;
} I assigned this returned serverList as session attribute named "serverList"
jsp file
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<logic:present name="serverList">
     <logic:iterate id="serverName" name="serverList">
          <bean:write name="serverName"/>
     </logic:iterate>
</logic:present>What is problem here? pls help me.

Answer 1

Double Post: http://forum.java.sun.com/thread.jspa?threadID=631435&messageID=3644257#3644257