public static String readJSON(String url) throws IOException {
    URL urlObj = new URL(url);
    HttpURLConnection connection = (HttpURLConnection) urlObj.openConnection();
    connection.addRequestProperty("Accept", "application/json");
    connection.connect();
    BufferedReader in =new BufferedReader(new InputStreamReader(connection.getInputStream()));

    String json = "", tmp;
    while ((tmp = in.readLine()) != null)
          json += tmp;
    connection.disconnect();

    return json;
}