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1NoClassDefFoundError: javax/activation/DataSource
2Session session = Session.getDefaultInstance(props, null);
3      Store store = session.getStore("imaps");
4      store.connect("imap.gmail.com", "****@gmail.com", "****");
5      System.out.println(store);
6      Folder folder = store.getDefaultFolder();
7      folder = folder.getFolder("INBOX");
8      folder.open(Folder.READ_ONLY);
9
10      System.out.println("Message Count: "+folder.getMessageCount());
11      System.out.println("Unread Message Count: "+folder.getUnreadMessageCount());
12
13
14           Message[] messages = folder.getMessages();  --> here the code stops.
15
16      FetchProfile fp = new FetchProfile();
17      fp.add(FetchProfile.Item.ENVELOPE);
18      folder.fetch(messages, fp);
19
20      for (int i = 0; i< messages.length; i++) 
21      { 
22          System.out.println("From:"+ messages[i].getFrom()); 
23          }