Need help defining variables from JSON formatted API response in Java

I'm working on a program that calls a random API from PokeAPI and creates variables from the response for use as hints. I'm having problems with actually creating variables from the http response especially with the getJSONObject() method because I don't know what to put in the parenthesis. If anyone could show me how to define variables from this data, i would appreciate it. Thank You.
here is an example of the JSON data

  "id": 12,
"name": "butterfree",
"base_experience": 178,
"height": 11,
"is_default": true,
"order": 16,
"weight": 320,
"abilities": [
{
"is_hidden": true,
"slot": 3,
"ability": {
"name": "tinted-lens",
"url": "https://pokeapi.co/api/v2/ability/110/"
}
}

and here is my attempt

import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonParser;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Random;
public class Main {
public static void main(String[] args) throws JSONException, IOException {
BufferedReader br;
Gson gson = new Gson();
Random random  = new Random();
int randomPoke = random.nextInt(151)+1;
String line;
StringBuffer responseContent = new StringBuffer();
String pokeURL = "https://pokeapi.co/api/v2/pokemon/" + randomPoke;
URL url = new URL(pokeURL);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestMethod("GET");
con.setReadTimeout(5000);
con.setConnectTimeout(5000);
int responseCode = con.getResponseCode();
System.out.println(responseCode);
if (responseCode > 299){
br = new BufferedReader(new InputStreamReader(con.getErrorStream()));
while ((line = br.readLine()) != null){
responseContent.append(line);
}
br.close();
}else {
br = new BufferedReader(new InputStreamReader(con.getInputStream()));
while ((line = br.readLine()) != null) {
responseContent.append(line);
}
br.close();
}
String json = gson.toJson(responseContent);
JSONObject jo = new JSONObject(json.trim().charAt(0));
//JSONArray ja = new JSONArray();
boolean isDefault = jo.getJSONObject(json).getBoolean("is_default");
System.out.println(isDefault);
} ```
</details>
# 答案1
**得分**: 0
```java
import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.google.gson.internal.LinkedTreeMap;
import org.junit.Test;
import static org.junit.Assert.assertTrue;
public class PokemonTest {
@Test
public void parserWithJsonParser() {
//given
String json = getJson();
Boolean isDefault = null;
//when
JsonElement element = JsonParser.parseString(json);
if (element.isJsonObject()) {
JsonObject asJsonObject = element.getAsJsonObject(); // is your Object
JsonElement element1 = asJsonObject.get("is_default");
if (element1.isJsonPrimitive()) {
isDefault = element1.getAsBoolean();
}
}
//then
assertTrue(isDefault);
}
@Test
public void parserWithMapOfObject() {
//given
String json = getJson();
//when
LinkedTreeMap<String, Object> linkedTreeMap = new Gson().fromJson(json, LinkedTreeMap.class);
Boolean isDefault = (Boolean) linkedTreeMap.get("is_default");
//then
assertTrue(isDefault);
}
public String getJson() {
return "{" +
"\"id\": 12," +
"\"name\": \"butterfree\"," +
"\"base_experience\": 178," +
"\"height\": 11," +
"\"is_default\": true," +
"\"order\": 16," +
"\"weight\": 320," +
"\"abilities\": [" +
"{" +
"\"is_hidden\": true," +
"\"slot\": 3," +
"\"ability\": {" +
"\"name\": \"tinted-lens\"," +
"\"url\": \"https://pokeapi.co/api/v2/ability/110/\"" +
"}" +
"}" +
"]" +
"}";
}
}

JsonElement element = JsonParser.parseString(json);

new Gson().fromJson(json, LinkedTreeMap.class);

import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.google.gson.internal.LinkedTreeMap;
import org.junit.Test;
import static org.junit.Assert.assertTrue;
public class PokemonTest {
@Test
public void parserWithJsonParser() {
//given
String json = getJson();
Boolean isDefault = null;
//when
JsonElement element = JsonParser.parseString(json);
if (element.isJsonObject()) {
JsonObject asJsonObject = element.getAsJsonObject(); // is your Object
JsonElement element1 = asJsonObject.get("is_default");
if (element1.isJsonPrimitive()) {
isDefault = element1.getAsBoolean();
}
}
//then
assertTrue(isDefault);
}
@Test
public void parserWithMapOfObject() {
//given
String json = getJson();
//when
LinkedTreeMap<String, Object> linkedTreeMap = new Gson().fromJson(json, LinkedTreeMap.class);
Boolean isDefault = (Boolean) linkedTreeMap.get("is_default");
//then
assertTrue(isDefault);
}
public String getJson() {
return "{\n" +
"  " +
"\"id\": 12,\n" +
"  \"name\": \"butterfree\",\n" +
"  \"base_experience\": 178,\n" +
"  \"height\": 11,\n" +
"  \"is_default\": true,\n" +
"  \"order\": 16,\n" +
"  \"weight\": 320,\n" +
"  \"abilities\": [\n" +
"    {\n" +
"      \"is_hidden\": true,\n" +
"      \"slot\": 3,\n" +
"      \"ability\": {\n" +
"        \"name\": \"tinted-lens\",\n" +
"        \"url\": \"https://pokeapi.co/api/v2/ability/110/\"\n" +
"      }\n" +
"    }\n" +
"  ]\n" +
"}";
}
}