public static final String CSV_DELIMITER = ";";
public static final String PARTICIPANTS_DELIMITER = ",";
private final SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss.SSS");


private static Meeting parseMeeting(final String s) throws ParseException {
    Meeting m = new Meeting();
    String[] splitString = s.split(CSV_DELIMITER);
    m.setDate(df.parse(splitString[0])); // attention à la ParseException
    m.setParticipants(Arrays.asList(splitString[1].split(PARTICIPANTS_DELIMITER)));
    m.setMedium(Medium.valueOf(splitString[2]));
    return m;
}