String query = "select JARMU_KULCS, TELEPHELY, BERELHETO, RENDSZAM, TIPUS " +
                "from zocwqs.Jarmu where RENDSZAM like ?";
        String param = String.format("'%%%s%%'",keyword);
        gui.log("Keyword param: "+param);

        ResultSet rset = null;
        PreparedStatement stmt = null;
        try {
            stmt = connection.prepareStatement(query);
            stmt.setString(1,param);
            rset = stmt.executeQuery();
        } catch (Exception ex)
        {
            gui.log("Unexpected error in exec statement: " + ex.getMessage() + " " + ex.getCause());
        }