Adding or Appending JsonObject to Jsonarray in java

AddJsonObjectToJSONArray.java

                String jsonData = "{\"results\":[{\"lat\":\"value\",\"lon\":\"value\" }]}";
		System.out.println(jsonData);
		try {
			JSONArray result = new JSONObject(jsonData).getJSONArray("results");
			result.getJSONObject(0).put("city","Singapore");
			jsonData = "{\"results\":"+result.toString()+"}";
			System.out.println(jsonData);
		} catch (JSONException e) {
			e.printStackTrace();
		}