How to convert ArrayList to JSON object

Question

public ArrayList<String> convertJsonToJsonObject(){

    ArrayList<String> mylist = new ArrayList<String> ();

    mylist.add("abc");
    mylist.add("cfd");
    mylist.add("ert");
    mylist.add("fg");
    mylist.add("ujk");
    mylist.add("wer");

    mylist.add("dvb");
    mylist.add("ert");


    System.out.println("JSONObject :: "+(JSONObject)JSONSerializer.toJson(mylist));
}

I am having error at .toJson() method, I am not sure what is the mistake I am making.

Answer 1

You can use the GSON library to accomplish this.

 ArrayList<String> mylist = new ArrayList<String> ();
 mylist.add("abc");
 mylist.add("cfd");
 mylist.add("ert");
 mylist.add("fg");
 mylist.add("ujk");
 String json = new Gson().toJson(mylist);

You can refer to the GSON User Guide for more support.

Answer 2

JSONArray jsArray = new JSONArray(mylist);

Or

Gson gson = new Gson();
String jsonArray = gson.toJson(mylist);

Get java-json.jar and Gson.jar here