json to arraylist code example

Example 1: objectmapper convert list of objects

List myObjects = mapper.readValue(jsonInput, new TypeReference>(){});

Example 2: jsonarray to list java

JSONArray data = new JSONArray(); //create data from this -> [{"thumb_url":"tb-1370913834.jpg","event_id":...}]

List list = data.stream().map(o -> (JSONObject) o).collect(Collectors.toList());

Example 3: arraylist to json array

ArrayList list = new ArrayList();
list.add("foo");
list.add("baar");
JSONArray jsArray = new JSONArray(list);

Example 4: convert json to arraylist java

// Top of file
import java.lang.reflect.Type;

// ...

private void parseJSON() {
    Gson gson = new Gson();
    Type type = new TypeToken>(){}.getType();
    List contactList = gson.fromJson(jsonString, type);
    for (ContactModel contact : contactList){
        Log.i("Contact Details", contact.id + "-" + contact.name + "-" + contact.email);
    }
}