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javaarraysjsonlistorg.json

How to get a value which is a List from a JSONObject in Java

I have a following JSON:

{"data":["str1", "str2", "str3"]}

I want to get a List, i.e. ["str1", "str2", "str3"]

My code is:

JSONObject json = new JSONObject();
List list = new ArrayList();
...
// adding data in json
...
list = (List) json.get("data");

This is not working.

Solution

  • You can customize a little bit of code like it

    public static void main(String[] args) throws ParseException {
        String data = "{\"data\":[\"str1\", \"str2\", \"str3\"]}";
        JSONObject json = new JSONObject(
                data);
         
        JSONArray jasonArray = json.getJSONArray("data");
        List list = new ArrayList();

        int size = jasonArray.length();
        int i = 0;
        while (i < size) {
            list.add(jasonArray.get(i));
            i++;
        }

        System.out.println(list);

    }