Create a JSONArray in Java

Question

How can I create a JSONArray, since creating a JSONObject is quite simple:

JSONObject j = new JSONObject();
j.put("key",value);

Right now I can put another string in the JSONObject, or a string representation of a JSONObject.

But how can I create a JSONArray and insert it to the JSONObject?

This should help: http://stackoverflow.com/a/2544198/1472887 — D-32, Nov 07 '12 at 11:29
Check this thread: http://stackoverflow.com/questions/7976643/how-to-create-json-array-in-java — suhas_sm, Nov 07 '12 at 11:30

score 14 · Accepted Answer · answered Nov 07 '12 at 11:29

But how can I create a JSONArray and insert it to the JSONObject?

You can create JSONArray same like you have tried to create JSONObject.

Creating time:

For example:

JSONArray myArray = new JSONArray();
JSONObject j = new JSONObject();
j.put("key",value);
j.put("array",myArray);

Retrieving time:

you can fetch the value of String or JSONObject or any by their key name. For example:

JSONArray myArray = objJson.getJSONArray("array");

Nermeen · Answer 2 · 2021-03-30T09:48:08.777

7

You can do it like:

String[] data = {"stringone", "stringtwo"};
JSONArray json = new JSONArray(Arrays.toString(data));

Or, create a JSONArray object and use the put method(s) to add any Strings you want. To output the result, just use the toString() method.

edited Mar 30 '21 at 09:48

answered Nov 07 '12 at 11:29

Nermeen

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Why are you passing a `List` into constructor of JSONArray? It should just accept a `String`. – IgorGanapolsky Mar 23 '16 at 18:11
I was not able to solve my problem by this so I used JSONArray json = new JSONArray(Arrays.toString(array)); – nimi0112 Feb 07 '18 at 14:28

score 6 · Answer 3 · answered Nov 07 '12 at 11:53

Why dont you use Gson library its very easy to convert any object into json array, json object

Download Gson library then use like

Gson gson=new Gson();

String json=gson.toJson(object);

if Object is of List object it will create json array

Gson gson = new Gson();

reverse parsing for array -- 
        listObject = gson.fromJson(json,
                new TypeToken<List<ClassName>>() {
                }.getType());

for single object

object = gson.fromJson(json, ClassName.class);

Create a JSONArray in Java

3 Answers3

Creating time:

Retrieving time:

Linked