(Java) IMAP Delete Old Email (before a specified date)

Demonstrates how to delete email older than a particular date.

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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

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

    CkImap imap = new CkImap();

    // Connect to an IMAP server.
    // Use TLS
    imap.put_Ssl(true);
    imap.put_Port(993);
    // Use your IMAP server domain.  This example 
    boolean success = imap.Connect("my-imap-server-domain.com");
    if (success != true) {
        System.out.println(imap.lastErrorText());
        return;
        }

    // Login
    success = imap.Login("myLogin","myPassword");
    if (success != true) {
        System.out.println(imap.lastErrorText());
        return;
        }

    // Select an IMAP mailbox
    success = imap.SelectMailbox("Inbox");
    if (success != true) {
        System.out.println(imap.lastErrorText());
        return;
        }

    // Get message ID's for emails older than 1/1/2018
    CkMessageSet messageSet;
    boolean fetchUids = true;
    messageSet = imap.Search("SENTBEFORE 01-Jan-2018",fetchUids);
    if (imap.get_LastMethodSuccess() == false) {
        System.out.println(imap.lastErrorText());
        return;
        }

    // If desired, we can examine the Subject of each email to be deleted..
    int i = 0;
    int count = messageSet.get_Count();
    while (i < count) {
        CkEmail email = imap.FetchSingleHeader(messageSet.GetId(i),true);
        if (imap.get_LastMethodSuccess() == true) {
            System.out.println(email.subject());

            }

        i = i+1;
        }

    // Set the Deleted flag for each message:
    success = imap.SetFlags(messageSet,"Deleted",1);
    if (success != true) {
        System.out.println(imap.lastErrorText());

        return;
        }

    // Expunge and close the mailbox.
    success = imap.ExpungeAndClose();
    if (success != true) {
        System.out.println(imap.lastErrorText());

        return;
        }

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