Java Requires Chilkat v11.0.0+

Fetch 1st N Headers of Search Results

Calls Search to get a message set, then downloads the 1st N messages in the message set. There are two equivalent ways of doing it: (1) iterate from 0 to N-1 and download each message individually, or (2) create a new message set that contains the 1st N messages and pass it to FetchHeaders. Both are demonstrated here. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Email;
import com.chilkatsoft.chilkat2.Imap;
import com.chilkatsoft.chilkat2.MessageSet;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example assumes the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Imap imap = new Imap();

        // Connect to an IMAP server.
        // Use TLS
        imap.setSsl(true);
        imap.setPort(993);
        try {
            imap.connect("imap.example.com");

            // Login
            imap.login("****", "****");

            // Select an IMAP mailbox
            imap.selectMailbox("Inbox");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Get the message IDs of all the emails in the mailbox
        // We can choose to fetch UIDs or sequence numbers.
        boolean fetchUids = true;
        MessageSet messageSet = new MessageSet();
        try {
            imap.queryMbx("ALL", fetchUids, messageSet);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        int numFound = messageSet.getCount();
        if (numFound == 0) {
            System.out.println("No messages found.");
            return;
        }

        // Get the 1st 10 messages in messageSet.
        int upperBound = 10;
        if (numFound < upperBound) {
            upperBound = numFound;
        }

        int i = 0;
        boolean bUid = messageSet.getHasUids();
        boolean headerOnly = true;
        Email email = new Email();

        while (i < upperBound) {
            try {
                imap.fetchEmail(headerOnly, messageSet.getId(i), bUid, email);
            } catch (ChilkatException e) {
                System.out.println(e.getLastErrorText());
                return;
            }

            System.out.println(i + ": " + email.getSubject());

            i = i + 1;
        }

        // Disconnect from the IMAP server.
        imap.disconnect();
    }
}