It is the following, I have the GPS object, it is with a json as follows the image, I want to get the data of the field code and field name and place them within the attributes of the GPS object. FOLLOW IMAGE 
How can I do this?
I tried this way, but no event
this.nome = lista.get(acessorio).nome;
this.codigo = lista.get(acessorio).codigo;
There is already a library that does this, populates the objects and converts the object to json.
To popular the object:
Gson gson = new Gson();
Acessorio gps = gson.fromJson(json, Acessorio.class);
Converts the object to json:
Gson gson = new Gson();
String json = gson.toJson(objeto);
objects should be a JavaBeans .
Include dependency Maven to your project or download Jar's .