read unread mail and mark it as unseen using java

Question

Please help me out with this task. The task is reading the body of the unread emails and mark it as unseen or unread using java. I tried to some extent but whenever I use getContect() method for the reading body it is automatically set to READ. Below I've attached my code for reference and thanks so much for help in advance.

package com;


import java.util.Properties;





import javax.activation.DataHandler;
import javax.mail.BodyPart;
import javax.mail.Flags;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.UIDFolder;
import javax.mail.search.FlagTerm;

public class ReadMail {
    static String hostName="imap.mail.yahoo.com";
    static String username="[email protected]";
    static String password="password";
    static long maxUid=5;

    /**
     * @param args
     */
    /**
     * @param args
     */
    public static void main(String[] args) {
        Properties sysProps = System.getProperties();

        sysProps.setProperty("mail.store.protocol", "imaps");

        try {

            Session session = Session.getInstance(sysProps, null);

            Store store = session.getStore();

            store.connect(hostName, username, password);

            Folder emailInbox = store.getFolder("INBOX");
            UIDFolder uf = (UIDFolder)emailInbox;

            emailInbox.open(Folder.READ_WRITE);

            int messageCount = emailInbox.getMessageCount();

            System.out.println("Total Message Count: " + messageCount);

            int unreadMsgCount = emailInbox.getUnreadMessageCount();

            System.out.println("Unread Message Count: " + unreadMsgCount);



            Flags seen = new Flags(Flags.Flag.SEEN);
            FlagTerm unseenFlagTerm = new FlagTerm(seen, false);
            Message unreadmsg[] = emailInbox.search(unseenFlagTerm);

            //Message[] message = emailInbox.getMessages(); ///Will get all messages

            // Display message.
            if(unreadmsg.length==0)
                System.out.println("No new  messages found.\n");
            for (int i = 0; i < unreadmsg.length; i++) {
                if(uf.getUID(unreadmsg[i])>maxUid){
                    System.out.println("------------ Message "  + i+ " ------------");

                    System.out.println("SentDate : " + unreadmsg[i].getSentDate());
                    System.out.println("From : " + unreadmsg[i].getFrom());
                    System.out.println("Subject : " + unreadmsg[i].getSubject());
                    maxUid=uf.getUID(unreadmsg[i]);

                    Multipart multipart = (Multipart) unreadmsg[i].getContent();

                    for (int x = 0; x < multipart.getCount(); x++) {
                        BodyPart bodyPart = multipart.getBodyPart(x);

                        String disposition = bodyPart.getDisposition();

                        if (disposition != null && (disposition.equals(BodyPart.ATTACHMENT))) {
                            System.out.println("Please find the   attachment : ");

                            DataHandler handler = bodyPart.getDataHandler();
                            System.out.println("Attachment Name: " + handler.getName());
                        } else {
                            System.out.println(bodyPart.getContent());
                        }
                    }
                    System.out.println();

                }


            }



            emailInbox.close(true);

            store.close();

        } catch (Exception mex) {

            mex.printStackTrace();

        }



    }

}

Answer 1

The simplest approach is to open the folder READ_ONLY.

If that's not sufficient, you can set the property mail.imaps.peek to true.