import com.alibaba.fastjson.JSON;

import java.util.List;

import java.util.stream.Collectors;

public class JSONParseArray {

    public static void main(String[] args){

        JSONParseArrayTool();

    }

    public static void JSONParseArrayTool(){

        List<Long> newIds = JSON.parseArray(("[3095139,9080109]"), Long.class);

        List<Long> oldIds = JSON.parseArray(("[197868,197870]"), Long.class);

        List<Long> missIds = oldIds.stream().filter(id -> !newIds.contains(id)).collect(Collectors.toList());

        System.out.println(missIds);

    }

}