json syntax

1{
2  "first_name": "Taylor",
3  "last_name": "Hawkes",
4  "age": 31,
5  "address": {
6    "street": "954 Kazaam Lane",
7    "city": "Boulder",
8    "state": "CO",
9    "postalCode": "80303"
10  },
11  "emails": [
12    {
13      "type": "main",
14      "number": "th71852@gmail.com"
15    },
16    {
17      "type": "secondary",
18      "number": "taylordhawkes@gmail.com"
19    }
20  ]
21}

1{
2    "naming": "Umair Ali",
3    "fee": 4567.8,
4    "rollNo": 33,
5    "fruits": [
6        "banana",
7        "apple",
8        "orange"
9    ],
10    "nesting": {
11        "school": "Paras",
12        "class": 9,
13        "myObj": [
14            "english",
15            "history",
16            "science",
17            65.4,
18            {
19                "boolean": true
20            },
21            "InternetKiDunya.Com"
22        ]
23    }
24}

1JavaScript Object Notation 
2	Its a key value pair 
3	its popular light-weight way of transfering data 
4
5	for example : 
6	Lets try to create a json for Person Object 
7			with name , age , isMarried , gender 
8
9		Its ket value pair 
10		the key is always String and need to be in quotation
11		value can be :
12			String 
13			Number 
14			Boolean 
15			null 
16			array 
17			another json object
18
19
20		This is one json with 5 fields 
21		each key value pair should be separated by comma 
22		{
23			"name" 		: "Anna", 
24			"age" 		: 18  , 
25			"isMarried" : false , 
26			"gender"	: "female", 
27			"company"	: null 
28		}

1var myObj, x;
2myObj = {"name":"John", "age":30, "car":null};
3x = myObj.name;
4document.getElementById("demo").innerHTML = x;

1ArrayList<Countries> listCountries = new ArrayList<>();//country
2        ArrayList<Detail> listDetails = new ArrayList<>();//listDetail
3        ArrayList<Detail> listSub =  new ArrayList<>();//List Sub
4
5        Countries countries = new Countries();
6        countries.setId("1");
7        countries.setName("Sim");
8        countries.setGender("M");
9        countries.setCountry("khompong Chhnang");
10        countries.setPostalCode("225566");
11        //Add Countries object to ArrayList
12        listCountries.add(countries);
13
14        Detail detail =  new Detail();
15        detail.setPhone("09659694146");
16        detail.setAddress("11H");
17        //Add Detail object to ArrayList
18        listDetails.add(detail);
19
20        Detail detail1 =  new Detail();
21        detail1.setPhone("2222");
22        detail1.setAddress("tttt2");
23        listSub.add(detail1);
24
25        JSONObject jsonObject_sub = new JSONObject();
26        JSONArray jsonArray_sub = new JSONArray();
27        for (int i = 0; i < listSub.size(); i++){
28            try {
29                jsonObject_sub.put("Phone",listSub.get(i).getPhone());
30                jsonObject_sub.put("Address",listSub.get(i).getAddress());
31                jsonArray_sub.put(jsonObject_sub);
32            } catch (JSONException e) {
33                e.printStackTrace();
34            }
35        }
36
37        JSONObject jb = new JSONObject();
38        JSONArray jsonArray = new JSONArray();
39        for (int i = 0; i<listDetails.size(); i++){
40            //convert to JSONObject
41            try {
42                jb.put("Address",listDetails.get(i).getAddress());
43                jb.put("Phone",listDetails.get(i).getPhone());
44                jb.put("sub_detail",jsonArray_sub);
45            } catch (JSONException e) {
46                e.printStackTrace();
47            }
48        }
49        //convert JSONObject to JSONArray
50        for (int i = 0; i < 3; i++){
51            jsonArray.put(jb);
52        }
53
54
55        JSONObject jsonObject = new JSONObject();
56        for (int i=0; i<listCountries.size(); i++){
57            try {
58                //convert to JSONObject
59                jsonObject.put("id",listCountries.get(i).getId());
60                jsonObject.put("name",listCountries.get(i).getName());
61                jsonObject.put("gender",listCountries.get(i).getGender());
62                //put JSONArray into JSONObject
63                jsonObject.put("detail",jsonArray);
64                jsonObject.put("country",listCountries.get(i).getCountry());
65                jsonObject.put("postal_code",listCountries.get(i).getPostalCode());
66            } catch (JSONException e) {
67                e.printStackTrace();
68            }
69            Log.d(">>>", "jsonObject: "+jsonObject);
70        }
71
72
73================Output===========================================================
74  {"id":"1","name":"Sim","gender":"M","detail":[{"Address":"11H","Phone":"09659694146","sub_detail":[{"Phone":"2222","Address":"tttt2"}]},{"Address":"11H","Phone":"09659694146","sub_detail":[{"Phone":"2222","Address":"tttt2"}]},{"Address":"11H","Phone":"09659694146","sub_detail":[{"Phone":"2222","Address":"tttt2"}]}],"country":"khompong Chhnang","postal_code":"225566"}