Get JSON key name using GSON

Question

I have a JSON array which contains objects such as this:

{
    \"bjones\": {
        \"fname\": \"Betty\",
        \"lname\": \"Jones\",
        \"password\": \         


        

Answer 1

Your JSON is fairly simple, so even the manual sort of methods (like creating maps of strings etc for type) will work fine.

For complex JSONs(where there are many nested complex objects and lists of other complex objects inside your JSON), you can create POJO for your JSON with some tool like http://www.jsonschema2pojo.org/

And then just :

final Gson gson = new Gson();

final MyJsonModel obj = gson.fromJson(response, MyJsonModel.class);

// Just access your stuff in object. Example
System.out.println(obj.getResponse().getResults().get(0).getId());

Answer 2

Using keySet() directly excludes the necessity in iteration:

ArrayList<String> objectKeys =
  new ArrayList<String>(
    myJsonObject.keySet());

Answer 3

Use entrySet to get the keys. Loop through the entries and create a User for every key.

JsonObject result = p.parse(file).getAsJsonObject();
Set<Map.Entry<String, JsonElement>> entrySet = result.entrySet();
for(Map.Entry<String, JsonElement> entry : entrySet) {
    User newUser = gson.fromJson(p.getAsJsonObject(entry.getKey()), User.class);
    newUser.username = entry.getKey();
    //code...
}