android studio – RECORD JSON JAVA

I have this JSON

    "id": 2,
    "group_id": 1,
    "default_billing": "2",
    "default_shipping": "2",
    "created_at": "2018-10-03 16:12:55",
    "updated_at": "2018-10-03 16:13:00",
    "created_in": "Default Store View",
    "email": "",
    "firstname": "Henry",
    "lastname": "Arcila",
    "store_id": 1,
    "website_id": 1,
                    "region":"New York",
                                "123 Oak Ave"
                "telephone": "512-555-1111",
                "postcode": "10755",
                "city": "Purchase",
                "firstname": "Henry",
                "lastname": "Arcila",
                "default_shipping": true,
                "default_billing": true
        "disable_auto_group_change": 0

That JSON I got from this line of code:

JSONObject json = new JSONObject (responseStrBuilder.toString ());

Since I'm extracting this from a REST query, I want to save that JSON in a variable and then extract each one of these fields that are inside the ADDRESSES:

firstname, lastname, region_code, region, region_id, country_id,
  street, telephone, postcode and city.

At the time of obtaining them I want to save them in different variables and have them stored because then in other REST responses I need to load another JSONObject those variables an example is this:

JSONObject JshippingAddress = new JSONObject ();
                JshippingAddress.put ("email", "");
                JshippingAddress.put ("region", "New York");
                JshippingAddress.put ("region_id", 43);
                JshippingAddress.put ("region_code", "NY");
                JshippingAddress.put ("country_id", "US");
                JshippingAddress.put ("street", JCalle);
                JshippingAddress.put ("postcode", "10577");
                JshippingAddress.put ("city", "Purchase");
                JshippingAddress.put ("telephone", "512-555-111");
                JshippingAddress.put ("firstname", "Henry");
                JshippingAddress.put ("lastname", "Arcila");

At this time HARD CODE was passed, it should be noted that they are in different classes so I keep GLOBAL variables in a controller.