[json] I want to add a JSONObject to a JSONArray and that JSONArray included in other JSONObject

I need below kind of structure constructed in java and send it as response :

var abc = {
  "action": "Remove",
  "datatable": [
    { "userid": "userid0", "username": "name0" },
    { "userid": "userid1", "username": "name1" },
    { "userid": "userid2", "username": "name2" },
    { "userid": "userid3", "username": "name3" }
  ],
  "msgType": "success"
};

I am doing:

JSONArray jsonArray = new JSONArray();

for (loop) {
    JSONObject jsonObj= new JSONObject();
    jsonObj.put("srcOfPhoto", srcOfPhoto);
    jsonObj.put("username", "name"+count);
    jsonObj.put("userid", "userid"+count);

    jsonArray.add(jsonObj.toJSONString());
}

Map paramMap = new HashMap();

paramMap.put("action", "remove");

paramMap.put("datatable", jsonArray );

paramMap.put(Constant.MSG_TYPE , Constant.SUCCESS);

getJSONMessage(paramMap);

and here above function is converting paramMap into json string like:

public static String getJSONMessage(Map<String, String> paramMap) {
    if (paramMap != null && paramMap.size() > 0)
        return JSONObject.toJSONString(paramMap);
    else
        return "";
}

but it is not creating the right structure, can anybody help me in this?

here is what I am getting output:

{"action":"Remove","datatable":[{\"userid\":\"userid0\",\"srcOfPhoto\":\"users\\\/JMMBGTCHG.jpg\",\"username\":\"name0\"}"],"msgType":"success"}

which is not being parsed in javascript.

var json = eval('(' + respText+')');
alert("contents>>"+json.datatable);
alert("contents.datatable[0]>>>"+json.datatable[0].username);

last alert showing undefined.

ohh sorry I forgot to paste last line , here is the last line:

getJSONMessage(paramMap);

and above function is converting paramMap into json string:

public static String getJSONMessage(Map<String, String> paramMap){
    if(paramMap != null && paramMap.size() > 0)
        return JSONObject.toJSONString(paramMap);
    else
        return "";
}

org.json.simple.JSONArray resultantJson = new org.json.simple.JSONArray();

        org.json.JSONArray o1 = new org.json.JSONArray("[{\"one\":[],\"two\":\"abc\"}]");
        org.json.JSONArray o2 = new org.json.JSONArray("[{\"three\":[1,2],\"four\":\"def\"}]");


        resultantJson.addAll(o1.toList());
        resultantJson.addAll(o2.toList());

JSONObject json = new JSONObject();
json.put("fromZIPCode","123456"); 

JSONObject json1 = new JSONObject();
json1.put("fromZIPCode","123456"); 
       sList.add(json1);
       sList.add(json);

System.out.println(sList);

Output will be

[{"fromZIPCode":"123456"},{"fromZIPCode":"123456"}]

JSONArray successObject=new JSONArray();
JSONObject dataObject=new JSONObject();
successObject.put(dataObject.toString());

This works for me.

JSONArray jsonArray = new JSONArray();

for (loop) {
    JSONObject jsonObj= new JSONObject();
    jsonObj.put("srcOfPhoto", srcOfPhoto);
    jsonObj.put("username", "name"+count);
    jsonObj.put("userid", "userid"+count);

    jsonArray.put(jsonObj.valueToString());
}

JSONObject parameters = new JSONObject();

parameters.put("action", "remove");

parameters.put("datatable", jsonArray );

parameters.put(Constant.MSG_TYPE , Constant.SUCCESS);

Why were you using an Hashmap if what you wanted was to put it into a JSONObject?

EDIT: As per http://www.json.org/javadoc/org/json/JSONArray.html

EDIT2: On the JSONObject method used, I'm following the code available at: https://github.com/stleary/JSON-java/blob/master/JSONObject.java#L2327 , that method is not deprecated.

We're storing a string representation of the JSONObject, not the JSONObject itself