Error when trying to get last modifed time of a file on a server

Question

I'm trying to getLastModifed() time of my text file on a server with URLConnection and getting an error.

Here's the code:

public static String checkLastModified() throws IOException {
    URL url = new URL("http://c24871.shared.hc.ru/Extra.txt");
    URLConnection con = url.openConnection();
    Date lastModified = new Date(con.getLastModified());

    return dff.format(lastModified);
}

If you want more information I'll edit the question.

Answer 1

Finally found the solution. Need just to put all this function in a Thread:

new Thread(new Runnable() {
        public void run() {
            URL url = null;
            try { url = new URL("http://c24871.shared.hc.ru/Extra.txt");
            } catch (MalformedURLException e) { e.printStackTrace(); }
            connection = null;
            try { connection = url.openConnection();
            } catch (IOException e) { e.printStackTrace(); }
            Log.d(TAG, String.valueOf(connection.getLastModified()));


        }
    }).start();