If you're talking about using the JSON in java library, then since your input string is a JSON object, not a JSON array, you should first load it using JSONObject:
String response=getResponseFromServer();
JSONObject jsonObject = new JSONObject(response);
After that, you can use toJSONArray() to convert a JSONObject to JSONArray given an array of key strings:
String[] names = JSONObject.getNames(jsonObject);
JSONArray jsonArray = jsonObject.toJSONArray(new JSONArray(names));