public static void dumpEnvelope(Message m) throws Exception {
    pr("This is the message envelope");
    pr("---------------------------");
    Address[] a;
    // FROM
    if ((a = m.getFrom()) != null) {
      for (int j = 0; j < a.length; j++) pr("FROM: " + a[j].toString());
    }

    // TO
    if ((a = m.getRecipients(Message.RecipientType.TO)) != null) {
      for (int j = 0; j < a.length; j++) pr("TO: " + a[j].toString());
    }

    // SUBJECT
    pr("SUBJECT: " + m.getSubject());

    // DATE
    Date d = m.getSentDate();
    pr("SendDate: " + (d != null ? d.toString() : "UNKNOWN"));

    // FLAGS
    Flags flags = m.getFlags();
    StringBuffer sb = new StringBuffer();
    Flags.Flag[] sf = flags.getSystemFlags(); // get the system flags

    boolean first = true;
    for (int i = 0; i < sf.length; i++) {
      String s;
      Flags.Flag f = sf[i];
      if (f == Flags.Flag.ANSWERED) s = "\\Answered";
      else if (f == Flags.Flag.DELETED) s = "\\Deleted";
      else if (f == Flags.Flag.DRAFT) s = "\\Draft";
      else if (f == Flags.Flag.FLAGGED) s = "\\Flagged";
      else if (f == Flags.Flag.RECENT) s = "\\Recent";
      else if (f == Flags.Flag.SEEN) s = "\\Seen";
      else continue; // skip it
      if (first) first = false;
      else sb.append(' ');
      sb.append(s);
    }

    String[] uf = flags.getUserFlags(); // get the user flag strings
    for (int i = 0; i < uf.length; i++) {
      if (first) first = false;
      else sb.append(' ');
      sb.append(uf[i]);
    }
    pr("FLAGS: " + sb.toString());

    // X-MAILER
    String[] hdrs = m.getHeader("X-Mailer");
    if (hdrs != null) pr("X-Mailer: " + hdrs[0]);
    else pr("X-Mailer NOT available");
  }
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  public Object getValueAt(int row, int column) {
    try {
      Message message = getMessage(row);
      switch (column) {
        case 0:
          // Answered?
          return (message.isSet(Flags.Flag.ANSWERED) ? "R" : "");

        case 1:
          // From.
          Address[] addresses = message.getFrom();
          if (addresses == null || addresses.length == 0) {
            return "(No sender)";
          }
          // Given "Personal Name <*****@*****.**>", choose "Personal Name" if it's available, and
          // "*****@*****.**" if not.
          InternetAddress address = (InternetAddress) addresses[0];
          String name = address.getPersonal();
          return (name != null) ? name : address.getAddress();

        case 2:
          // Subject.
          String subject = message.getSubject();
          return (subject != null) ? subject : "(No subject)";

        case 3:
          // Date.
          Date date = message.getReceivedDate();
          return (date != null) ? Mailer.dateToIsoString(date) : "Unknown";

        default:
          return "<no-column-" + column + ">";
      }
    } catch (MessagingException ex) {
      ex.printStackTrace();
      return "<error>";
    }
  }