Read latest email - Javamail

Question

I gave a search here but unsuccessfully. Someone knows how to find the latest email using the JavaMail? What I’m using pulls all the emails. My code:

        try {

            campolog.setContentType("text/html");

            Properties props = new Properties();

            props.put("mail.smtp.host", "smtp.gmail.com");
            props.put("mail.smtp.port", "587");
            props.put("mail.smtp.starttls.enable", "true");
            Session emailSession = Session.getDefaultInstance(props);

            Store store = emailSession.getStore("imaps");
            store.connect("pop.gmail.com", "[email protected]", "senha");

//            javax.mail.Folder[] folders = store.getDefaultFolder().list("*");
//            for (javax.mail.Folder folder : folders) {
//                if ((folder.getType() & javax.mail.Folder.HOLDS_MESSAGES) != 0) {
//                    System.out.println(folder.getFullName() + ": " + folder.getMessageCount());
//                }
//            }

            Folder pastaEmail = store.getFolder("SMS");
            pastaEmail.open(Folder.READ_ONLY);

            Message[] mensagens = pastaEmail.getMessages();
            System.out.println("Total de Emails: " + mensagens.length);

            for (int i = 0, n = mensagens.length; i < n; i++) {
                    Message mensagem = mensagens[i];
                    //campolog.append("---------------------------------");
                    //campolog.append("Email Nº " + (i + 1));
                    //campolog.append("Assunto: " + mensagem.getSubject());
                    //campolog.setText("De: " + mensagem.getFrom()[0]);
                    campolog.setText("Mensagem: " + mensagem.getContent().toString());
            }

            pastaEmail.close(false);
            store.close();

        } catch (NoSuchProviderException e) {
            e.printStackTrace();
        } catch (MessagingException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
}

Answer 1

Never used, but reading the API documentation:

• https://javaee.github.io/javamail/docs/api/sun/mail/imap/IMAPFolder.html#getSortedMessages-com.sun.mail.imap.Sortterm:A-

I guess you have to use getSortedMessages then you would order by date, so:

SortTerm[] termos = new SortTerm[1];

termos[0] = SortTerm.DATE; //Pode adicionar mais critérios de ordem adicionando termos[1], termos[2], etc

Folder pastaEmail = store.getFolder("SMS");
pastaEmail.open(Folder.READ_ONLY);

Message[] mensagens = ((IMAPFolder) pastaEmail).getSortedMessages(termos);

The code I did following the example of this reply from Soen: https://stackoverflow.com/a/50994431/1518921

So to read the first message instead of the for I’d just do a check like this:

if (mensagens.length > 0) {
    mensagens[0].getContent(); //Faça algo com o conteudo retornado
} else {
    //Não há mensagens
}

The SortTerm.DATE will sort by the date (and time) of sending the message, so you will pick up by the time the sender sent, but if you need the time of "arrival", when it arrived to your email box, then use:

• https://javaee.github.io/javamail/docs/api/com/sun/mail/imap/SortTerm.html#ARRIVAL

Thus:

SortTerm[] termos = new SortTerm[1];

termos[0] = SortTerm.ARRIVAL;

Folder pastaEmail = store.getFolder("SMS");
pastaEmail.open(Folder.READ_ONLY);

I have never used, as I said, only read the documentation and the reply, but I believe that this sort as expected, however if it is in reverse order, for example return the oldest message on mensagens[0].getContent(); then just reverse by taking the last item of Message[] mensagens, thus:

if (mensagens.length > 0) {
    final int ultimaMensagem = mensagens.length - 1;
    mensagens[ultimaMensagem].getContent();
} else {
    //Não há mensagens
}

Or simply:

if (mensagens.length > 0) {
    mensagens[ mensagens.length - 1 ].getContent();
} else {
    //Não há mensagens
}