How to determine whether a recordset is Empty or not ?

Question

Please see my snippet code below :
<%     
     String sql="";
     String username="CDS";
     try
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            Connection con = DriverManager.getConnection("jdbc:odbc:Employees","","");
            Statement stmt = con.createStatement();
            ResultSet rs=null;
               sql = "Select * from Employee where code='" + username + "'";
               rs = stmt.executeQuery(sql);
               rs.next();
               if (rs==null)
               %>
                    <jsp:forward page="Login.jsp?msg=Username not recognized"></jsp:forward>     
               <%     
            else
               %>
                    <jsp:forward page="Login.jsp?msg=Halo"></jsp:forward>
               <%
          catch(ClassNotFoundException e)
               out.println("Driver not found");
                catch(SQLException e2)
                        out.println(e2.getMessage());
                        out.println("<BR>");
                        out.println("Wrong SQL Statement");
                        out.println("<BR>");
                        out.println(sql);
                        out.println("<BR>");
     %>How to determine whether a recordset has no result ?
From the above code, i use if (rs==null) and that's not worked.
Help me, guys.

Answer 1

ResultSet rs = stmt.executeQuery(sql);
if (rs.next()) {
%>
    <jsp:forward page="Login.jsp?msg=Halo"/>
<%
} else {
%>
    <jsp:forward page="Login.jsp?msg=Username not > recognized"/>
<%
}