public Writer write(Writer writer) throws JSONException {
        try {
            boolean  commanate = false;
            Iterator keys = keys();
            writer.write('{');

            while (keys.hasNext()) {
                if (commanate) {
                    writer.write(',');
                }
                Object key = keys.next();
                writer.write(quote(key.toString()));
                writer.write(':');
                Object value = this.map.get(key);
                if (value instanceof JSONObject) {
                    ((JSONObject)value).write(writer);
                } else if (value instanceof JSONArray) {
                    ((JSONArray)value).write(writer);
                } else {
                    writer.write(valueToString(value));
                }
                commanate = true;
            }
            writer.write('}');
            return writer;
        } catch (IOException exception) {
            throw new JSONException(exception);
        }
     }