private String showAnnonce(int i) {
        String res = "";
        //////
        if (voyages.length > 0) {
            sb.append("Destination");
            sb.append(voyages[i].getDestination());
            sb.append("\n");

            sb.append("Date_depart");
            sb.append(voyages[i].getDate_depart());
            sb.append("\n");

            sb.append("Date_retour");
            sb.append(voyages[i].getDate_retour());
            sb.append("\n");

            sb.append("Itineraire");
            sb.append(voyages[i].getItineraire());
            sb.append("\n");

            sb.append("Nb_place");
            sb.append(voyages[i].getNb_place());
            sb.append("\n");
        }
        res = sb.toString();
        sb = new StringBuffer("");
        return res;
    }