Convert JSONObject to Map

You can use Gson() (com.google.gson) library if you find any difficulty using Jackson.

//changed yourJsonObject.toString() to yourJsonObject as suggested by Martin Meeser

HashMap<String, Object> yourHashMap = new Gson().fromJson(yourJsonObject, HashMap.class);

use Jackson (https://github.com/FasterXML/jackson) from http://json.org/

HashMap<String,Object> result =
       new ObjectMapper().readValue(<JSON_OBJECT>, HashMap.class);