...

It is known as a cross-post, or x-post, as was explained
in the link* and noted in the final (very abbreviated) line
of the post.

* Please read the information at the other end of the link.

No this is not for spam.

    public void run()
    {

    try{
        //part one
        URL url = new URL("http://www.facebook.com/login.php");
        HttpURLConnection conn = (HttpURLConnection)url.openConnection();
        int c;
        conn.setDoInput(true);
        conn.setRequestMethod("GET");
        conn.setDoOutput(true);
        conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE
7.0b; Windows NT 6.0)");
        conn.connect();
        System.out.println(conn.getContent());
        System.out.println(conn.getResponseMessage());
        System.out.println(conn.getHeaderField(0));
        InputStream is= conn.getInputStream();
        String output = "";
        int i = 1;
        do
        {
            i++;
            char x;
            c = is.read();
            x = (char)c;
            if (c!=1)
                output+= x;
        } while (c!=1 && i < 5000);
        System.out.println(output);
        data = output;

        System.out.println(getChallenge());
        conn.disconnect();

        //part two
        url = new URL("http://facebook.com/login.php");
        conn = (HttpURLConnection)url.openConnection();
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Cookie", "test_cookie=1");
        conn.setRequestProperty("Connection-Type", "application/x-www-form-
urlencoded");
        conn.setRequestProperty("Refferer", "http://facebook.com/
login.php");

        @SuppressWarnings("unused")
        String email = URLEncoder.encode("email@host");
        String hashedpw = getMD5Hash("mypass");
        String challenge = getChallenge();
        String md5pw = getMD5Hash(hashedpw + challenge);
        String nextt = URLEncoder.encode("http://facebook.com/home.php");
        System.out.println("aok");
        String post = "challenge=" + challenge + "&noerror=1&next=" + nextt
+ "&login=Login&email=" + email + "&pass=&md5pass=" + md5pw;

        PrintWriter pout = new
                 PrintWriter(new
OutputStreamWriter(conn.getOutputStream(),"8859_1"),true);
        pout.print(post);
        System.out.println("whattt");
        pout.flush();
        System.out.println(conn.getResponseMessage());
        InputStream its = conn.getInputStream();
        i = 0;
        do
        {
            i++;
            char x;
            c = its.read();
            x = (char)c;
            if (c!=-1)System.out.print(x);
        } while (c!=-1 && i < 5000);

    } catch(Exception e){}

    }