JSON to List or Map using GSON

JsonGsonToListOrMap.java

import java.util.List;
import java.util.Map;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import javax.ws.rs.core.GenericType;


public class JsonGsonToListOrMap {

    public static void main(String[] args) {

        String s;
        List<Object> list;
        Gson gson = new Gson();
//        works
        s = "{\"url\":{\"cpm\":[{\"image\":\"https://i.rmbl.ws/s8/6/1/R/V/u/1RVua.qR4e.2.jpg\",\"score\":1250000000000,\"boosted\":false,\"headline\":\"Puppy vs. Monster - 38k51\",\"url\":\"http://rumble.com/v38k51-puppy-vs.-monster.html\"},{\"image\":\"https://i.rmbl.ws/s8/6/g/t/n/t/gtnta.4Wpjb.2.jpg\",\"score\":700000000000,\"boosted\":false,\"headline\":\"Fat cat fails to rescue feline friend\",\"url\":\"http://rumble.com/v2zx6u-fat-cat-fails-to-rescue-feline-friend.html\"}]}}";
        Map<String, Map<String, List<Object>>> mapD= gson.fromJson(s, new GenericType<Map<String, Map<String, List<Object>>>>(){}.getType());
        mapD.forEach((x,y) -> System.out.println("key: " + x  +", value: "+ y));

//        works
        s = "{\"url\":{\"cpm\":[{\"image\":\"https://i.rmbl.ws/s8/6/1/R/V/u/1RVua.qR4e.2.jpg\",\"score\":1250000000000,\"boosted\":false,\"headline\":\"Puppy vs. Monster - 38k51\",\"url\":\"http://rumble.com/v38k51-puppy-vs.-monster.html\"},{\"image\":\"https://i.rmbl.ws/s8/6/g/t/n/t/gtnta.4Wpjb.2.jpg\",\"score\":700000000000,\"boosted\":false,\"headline\":\"Fat cat fails to rescue feline friend\",\"url\":\"http://rumble.com/v2zx6u-fat-cat-fails-to-rescue-feline-friend.html\"}]}}";
        Map<String, Map<String, List<Object>>> mapC= gson.fromJson(s, new TypeToken<Map<String, Map<String, List<Object>>>>(){}.getType());
        mapC.forEach((x,y) -> System.out.println("key: " + x  +", value: "+ y));

//        works
        s = "{\"cpm\":[{\"image\":\"https://i.rmbl.ws/s8/6/1/R/V/u/1RVua.qR4e.2.jpg\",\"score\":1250000000000,\"boosted\":false,\"headline\":\"Puppy vs. Monster - 38k51\",\"url\":\"http://rumble.com/v38k51-puppy-vs.-monster.html\"},{\"image\":\"https://i.rmbl.ws/s8/6/g/t/n/t/gtnta.4Wpjb.2.jpg\",\"score\":700000000000,\"boosted\":false,\"headline\":\"Fat cat fails to rescue feline friend\",\"url\":\"http://rumble.com/v2zx6u-fat-cat-fails-to-rescue-feline-friend.html\"}]}";
        Map<String, List<Object>> mapB= gson.fromJson(s, new TypeToken<Map<String, List<Object>>>(){}.getType());
        mapB.forEach((x,y) -> System.out.println("key: " + x  +", value: "+ y));

//        works
        s = "[{\"image\":\"https://i.rmbl.ws/s8/6/1/R/V/u/1RVua.qR4e.2.jpg\",\"score\":1250000000000,\"boosted\":false,\"headline\":\"Puppy vs. Monster - 38k51\",\"url\":\"http://rumble.com/v38k51-puppy-vs.-monster.html\"}]";
        list= gson.fromJson(s, new TypeToken<List<Object>>(){}.getType());
        list.forEach(x -> System.out.println(x));

//        works
        s = "[{\"image\":\"https://i.rmbl.ws/s8/6/1/R/V/u/1RVua.qR4e.2.jpg\",\"score\":1250000000000,\"boosted\":false,\"headline\":\"Puppy vs. Monster - 38k51\",\"url\":\"http://rumble.com/v38k51-puppy-vs.-monster.html\"}]";
        list= gson.fromJson(s, new TypeToken<List<Object>>(){}.getType());
        list.forEach(x -> System.out.println(x));

//        works
        s = "{\"image\":\"https://i.rmbl.ws/s8/6/1/R/V/u/1RVua.qR4e.2.jpg\",\"score\":1250000000000,\"boosted\":false,\"headline\":\"Puppy vs. Monster - 38k51\",\"url\":\"http://rumble.com/v38k51-puppy-vs.-monster.html\"}";
        Map<String, Object> mapA= gson.fromJson(s, new TypeToken<Map<String, Object>>(){}.getType());
        mapA.forEach((x,y) -> System.out.println("key: " + x  +", value: "+ y));
    }

}