如果没有来自其他类的嵌套对象，我如何返回JSON对象？

import json

def get_json_object():
    data = {
        "name": "John",
        "age": 30,
        "city": "New York"
    }
    json_data = json.dumps(data)
    return json_data

import com.google.gson.Gson;

public class Main {
    public static void main(String[] args) {
        String json = getJsonObject();
        System.out.println(json);
    }

    public static String getJsonObject() {
        Gson gson = new Gson();
        JsonObject data = new JsonObject();
        data.addProperty("name", "John");
        data.addProperty("age", 30);
        data.addProperty("city", "New York");
        String json = gson.toJson(data);
        return json;
    }
}

function getJsonObject() {
    var data = {
        name: "John",
        age: 30,
        city: "New York"
    };
    var json = JSON.stringify(data);
    return json;
}