Java Append object to JSON

Question

I would like to append JSON object to existing JSON array to get data structure like this.

\"results\":[
      {
         \"lat\":\"value\",
         \"lon\"         


        

Answer 1

Simple Approach

    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();
    }

OutPut Before Appending

{"results":[{"lat":"value","lon":"value" }]} 

OutPut After Appending

{"results":[{"lon":"value","lat":"value","city":"Singapore"}]}