Connection c = 
                    DriverManager.getConnection("jdbc:odbc:Test");
            Statement s = c.createStatement();
            r = s.executeQuery("select * from "+tableName+";");
            ResultSetMetaData rs = r.getMetaData();
             for (int i = 1; i <= rs.getColumnCount(); i++) {
                columnName.add(new String(rs.getColumnLabel(i)));
            }