Event Handling - JavaMail API - page 81

try {
System . out . println ( message . getSubject ());
} catch ( MessagingException e ) {
System . out . println ( "New message arrived!" );
}
}
}
@Override
public void messagesRemoved ( MessageCountEvent event ) {
// ignore
}
}
This class notifies the user by printing a message on the console. Of course, you could
pop up an alert in a GUI, ring a bell, or use any other technique you like.
Next you install this listener on the folder you wish to monitor as shown in Example 9-2 .
Example 9-2. Mailbox Monitor
import java.util.* ;
import javax.mail.* ;
import javax.mail.event.* ;
import com.sun.mail.imap.IMAPStore ;
public class GMailMonitor {
public static void main ( String [] args ) throws InterruptedException {
String username = args [ 0 ];
String password = args [ 1 ];
try {
Session session = Session . getInstance ( new Properties ());
final IMAPStore store = ( IMAPStore ) session . getStore ( "imaps" );
store . connect ( "imap.gmail.com" , username + "@gmail.com" , password );
final Folder inbox = store . getFolder ( "INBOX" );
if ( inbox == null ) {
System . out . println ( "No INBOX" );
System . exit ( 1 );
}
inbox . open ( Folder . READ_ONLY );
MessageCountListener countListener = new MessageArrival ();
inbox . addMessageCountListener ( countListener );
Runnable r = new Runnable () {
@Override
public void run () {
while ( true ) {
try {
System . out . println ( inbox . getMessageCount ());