package test;

import java.lang.reflect.Type;  
import java.util.LinkedList;
import java.util.List;  
  

import com.google.gson.Gson;  
import com.google.gson.reflect.TypeToken;  

public class Test {
    public static void main(String[] args) {  
        String json = "[{\"key\":\"key1\",\"value\":\"value1\"},{\"key\":\"key2\",\"value\":\"value2\"}]";  
        
        Type listType = new TypeToken<LinkedList<A>>(){}.getType(); 
        Gson gson = new Gson(); 
        LinkedList<A> la = gson.fromJson(json, listType); 
        System.out.println(la.size());
    }  

    class A {  
        private String key;  
        private String value;  
  
        public String getKey() {  
            return key;  
        }  
  
        public void setKey(String key) {  
            this.key = key;  
        }  
  
        public String getValue() {  
            return value;  
        }  
  
        public void setValue(String value) {  
            this.value = value;  
        }  
    }  
  
}