final URL url = new URL("<...>");
    String token = null;
    final HttpURLConnection con = (HttpURLConnection) url.openConnection();
    try (final InputStreamReader isr = new InputStreamReader(con.getInputStream())) {
        try (final BufferedReader in = new BufferedReader(isr)) {
            String str;
            while ((str = in.readLine()) != null) {
                if (str.contains("__token")) {
                    token = str.replace("<...>", "").replace("<...>", "");
                    System.out.println(token);
                    break;
                }
            }
            in.close();
        }
        isr.close();
    }
    con.setRequestMethod("POST");
    con.setRequestProperty("User-Agent", USER_AGENT);
    con.setDoOutput(true);
    try (final DataOutputStream wr = new DataOutputStream(con.getOutputStream())) {
        final String params = getParams("par1", "par2", token);
        wr.writeBytes(params);
        wr.flush(); wr.close();
        final int responseCode = con.getResponseCode();
        System.out.println("nSending 'POST' request to URL : " + url);
        System.out.println("Post parameters : " + params);
        System.out.println("Response Code : " + responseCode);
        try (final BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()))) {
            String inputLine;
            final StringBuilder response = new StringBuilder();
            while ((inputLine = in.readLine()) != null) {
                response.append(inputLine);
            }
            in.close();
            System.out.println(response.toString());
        }
    }