How to do something similar in java?

Question

Java

let Obj = [
         [
        {o:'-12188866'},
        {o:'-175'},
         ],
      
         [
              {g:78554274,t:30718264},
         ] 		
   ];

Answer 1

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.reflect.TypeToken;
import java.lang.reflect.Type;
import java.util.*;

String json = "";

Type listType = new TypeToken<List<List<Map<String, String>>>>(){}.getType();
Gson gson = new GsonBuilder().create();
List<List<Map<String, String>>> list = gson.fromJson(json, listType);