Convert LinkedTreeMap key-value pair into JSON

gistfile1.txt

public static JSONObject convertKeyValueToJSON(LinkedTreeMap<String, Object> ltm) {
        JSONObject jo=new JSONObject();
        Object[] objs = ltm.entrySet().toArray();
        for (int l=0;l<objs.length;l++)
        {
            Map.Entry o= (Map.Entry) objs[l];
            try {
                if (o.getValue() instanceof LinkedTreeMap)
                    jo.put(o.getKey().toString(),convertKeyValueToJSON((LinkedTreeMap<String, Object>) o.getValue()));
                else
                    jo.put(o.getKey().toString(),o.getValue());
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
        return jo;
    }