Sort Java List by pubDate

Question

I would like to sort a List of "Article" object by date.

My problem is that after sorting the list, it seems that the list is not well sorted.

Here is the code to sort the list :

public List<Article> getArticleList() {

    Collections.sort(articleList, new Comparator<Article>() {
        public int compare(Article o1, Article o2) {
            return o1.getPubDate().compareTo(o2.getPubDate());
        }
    });

    //Collections.reverse(articleList);

    for (Article a : articleList) {
        Log.d("RssHandler", "Date after sorting : " +a.getPubDate());
    }

    return articleList;
}

And here is the output :

06-17 14:38:39.828: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 14:47:00 +0200 06-17 14:38:39.828: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 14:58:00 +0200 06-17 14:38:39.833: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 15:17:00 +0200 06-17 14:38:39.833: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 15:41:00 +0200 06-17 14:38:39.833: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 15:58:00 +0200 06-17 14:38:39.833: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 15:59:00 +0200 06-17 14:38:39.833: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 16:03:00 +0200 06-17 14:38:39.833: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 16:09:00 +0200 06-17 14:38:39.833: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 16:34:00 +0200 06-17 14:38:39.833: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 16:41:00 +0200 06-17 14:38:39.833: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 16:50:00 +0200 06-17 14:38:39.833: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 16:52:00 +0200 06-17 14:38:39.833: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 17:24:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 17:37:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 17:42:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 17:45:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 17:54:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 17:56:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 17:58:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 18:04:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 18:20:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 18:25:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 18:43:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 18:45:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 19:18:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 19:20:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 19:36:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 19:52:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 20:14:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 20:27:00 +0200 06-17 14:38:39.838: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 20:31:00 +0200 06-17 14:38:39.843: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 20:54:00 +0200 06-17 14:38:39.843: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 21:00:00 +0200 06-17 14:38:39.843: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 21:20:00 +0200 06-17 14:38:39.843: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 22:59:00 +0200 06-17 14:38:39.843: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 23:05:00 +0200 06-17 14:38:39.843: D/RssHandler(29941): Date after sorting : Fri, 14 Jun 2013 23:08:00 +0200 06-17 14:38:39.843: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 00:43:00 +0200 06-17 14:38:39.843: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 06:49:40 GMT 06-17 14:38:39.843: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 07:22:00 +0200 06-17 14:38:39.843: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 07:26:00 +0200 06-17 14:38:39.848: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 07:33:00 +0200 06-17 14:38:39.848: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 07:44:00 +0200 06-17 14:38:39.848: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 07:51:16 GMT 06-17 14:38:39.848: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 08:02:00 +0200 06-17 14:38:39.848: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 08:02:00 +0200 06-17 14:38:39.848: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 08:19:00 +0200 06-17 14:38:39.848: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 08:21:00 +0200 06-17 14:38:39.848: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 08:37:00 +0200 06-17 14:38:39.848: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 08:39:00 +0200 06-17 14:38:39.848: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 08:45:00 +0200 06-17 14:38:39.848: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 08:50:00 +0200 06-17 14:38:39.848: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 08:51:00 GMT 06-17 14:38:39.848: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 08:59:17 GMT 06-17 14:38:39.848: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 09:00:00 GMT 06-17 14:38:39.848: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 09:12:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 09:14:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 09:30:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 09:40:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 09:40:00 GMT 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 09:51:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 09:52:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 09:56:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 10:20:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 10:30:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 10:35:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 10:50:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 10:51:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 10:52:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 10:56:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 11:15:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 11:15:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 11:17:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 11:30:00 GMT 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 11:35:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 11:37:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 11:41:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 11:46:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 11:47:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 11:57:00 +0200 06-17 14:38:39.853: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 12:01:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 12:18:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 12:19:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 12:20:00 GMT 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 12:30:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 12:32:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 12:48:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 13:07:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 13:11:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 14:14:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 14:21:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 14:23:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Mon, 17 Jun 2013 14:31:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 07:24:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 07:25:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 07:26:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 07:36:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 07:40:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 07:42:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 07:48:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 07:50:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 07:58:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 08:08:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 08:11:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 08:50:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 09:00:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 10:09:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 10:33:00 +0200 06-17 14:38:39.858: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 10:34:00 +0200 06-17 14:38:39.863: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 10:49:00 +0200 06-17 14:38:39.863: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 10:59:00 +0200 06-17 14:38:39.863: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 11:09:00 +0200 06-17 14:38:39.863: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 11:35:00 +0200 06-17 14:38:39.863: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 12:10:00 +0200 06-17 14:38:39.863: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 12:26:00 +0200 06-17 14:38:39.863: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 13:47:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 13:52:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 14:45:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 14:55:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 15:52:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 16:34:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 16:38:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 16:56:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 17:29:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 17:35:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 18:06:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 18:20:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 18:42:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 18:43:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 19:11:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 19:18:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 19:21:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 19:22:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 19:38:00 +0200 06-17 14:38:39.873: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 19:44:00 +0200 06-17 14:38:39.878: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 20:08:00 +0200 06-17 14:38:39.878: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 20:10:00 +0200 06-17 14:38:39.878: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 20:10:00 +0200 06-17 14:38:39.878: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 20:32:00 +0200 06-17 14:38:39.878: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 21:43:00 +0200 06-17 14:38:39.878: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 22:21:00 +0200 06-17 14:38:39.878: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 23:06:00 +0200 06-17 14:38:39.878: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 23:14:00 +0200 06-17 14:38:39.878: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 23:29:00 +0200 06-17 14:38:39.878: D/RssHandler(29941): Date after sorting : Sat, 15 Jun 2013 23:56:00 +0200 06-17 14:38:39.878: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 01:43:00 +0200 06-17 14:38:39.878: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 07:23:00 +0200 06-17 14:38:39.878: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 07:32:00 +0200 06-17 14:38:39.878: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 07:34:00 +0200 06-17 14:38:39.883: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 07:37:00 +0200 06-17 14:38:39.883: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 07:38:00 +0200 06-17 14:38:39.883: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 07:38:00 +0200 06-17 14:38:39.883: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 07:42:00 +0200 06-17 14:38:39.883: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 07:44:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 08:08:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 08:17:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 08:58:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 09:22:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 10:28:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 10:38:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 10:42:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 10:45:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 10:53:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 11:15:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 11:17:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 11:20:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 11:45:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 11:48:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 12:23:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 12:50:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 13:42:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 14:16:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 14:32:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 14:46:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 14:54:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 14:58:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 14:59:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 15:04:00 +0200 06-17 14:38:39.888: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 15:12:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 15:13:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 15:33:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 15:48:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 15:55:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 16:17:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 16:23:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 16:24:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 16:47:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 16:56:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 17:32:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 18:14:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 18:19:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 18:19:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 18:21:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 18:39:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 18:50:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 19:08:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 19:17:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 19:31:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 19:45:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 20:08:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 21:00:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 21:16:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 22:00:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 22:29:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 22:32:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 22:47:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 22:51:00 +0200 06-17 14:38:39.893: D/RssHandler(29941): Date after sorting : Sun, 16 Jun 2013 23:12:00 +0200

For information, the list contains elements retrieved from 2 differents RSS sources.

Date class has no method compareTo, however String has. You are probably returning a String represenatation of the date, as you can see the values are sorted according to alphabet. — Peter Jaloveczki, Jun 17 '13 at 12:52
Yes, in fact getPubDate return a String. It's my mistake. Is it a good solution to convert my PubDate String to a Date before store it in my list ? — wawanopoulos, Jun 17 '13 at 13:00

score 3 · Answer 1 · answered Jun 17 '13 at 12:53

3

It seems that getPubDate() returns a String. The natural order of Strings is to sort them alphabetically, which appears to be what is happening. Looking through your log, "F" comes before "M", "M" comes before "S", and so on, so, you are indeed getting a sorted list back of the Strings.

It would be better in your Article class to store Date objects (or Long timestamps). These will support sorting by date, which is what I assume you are after.

answered Jun 17 '13 at 12:53

Ken Wolf

23,133
6
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Yes, getPubDate return a String. It's my mistake. What is the best solution now ? Convert pubDate to a Date before adding it to my list or use SimpleDateFormat? Do you have an example to use one of these ? – wawanopoulos Jun 17 '13 at 12:59
Personally I would make `Article` hold a `Date` object. So whenever you instantiate an article, make sure the `Date` is created properly. There are a lot of examples on stack (http://stackoverflow.com/questions/6406470/java-simpledateformat) (http://stackoverflow.com/questions/3056703/simpledateformat). Basically it parses a string and turns it into a date – Ken Wolf Jun 17 '13 at 13:06

Sort Java List by pubDate

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