public static void main(String argv[]) throws Exception {

    ArrayList<Data> dataArrayList = new ArrayList();
    ArrayList<MyObject> dataTypeArrayList = new ArrayList<>();
    //Define which type of data will income
    dataTypeArrayList.add(new MyObject("acc",AccData.class));
    dataTypeArrayList.add(new MyObject("camera",CameraData.class));
    dataTypeArrayList.add(new MyObject("dht", DHTData.class));

    while (true) {
     //....

        JsonParser parser = new JsonParser();
        JsonObject json = (JsonObject) parser.parse(line);

        for (MyObject type :dataTypeArrayList) {  //search for DataClasses type

            String otype = json.get("Type").toString();

            if(otype.equals(type.getType())){
            //how can i call constuctor here?
            }
        }
    }
}