jmeter beanshell Typed variable declaration : Object constructor错误

从数据库取值和响应值做比较，使用beanshell如下：

import org.json.JSONArray;
import org.json.JSONObject;
 
 
res_str = prev.getResponseDataAsString();
JSONObject res_json_obj = new JSONObject(res_str);
JSONArray dbd_json_array = new JSONArray("${dbd}"); // 数据库转json
JSONObject dbd_json_obj = new JSONObject();
FailureMessage = "";
Failure = true;
 
res_json_obj = new JSONObject(res_json_obj.get("data").toString());
if (!res_json_obj.isNull("list")) {
    JSONArray res_json_array = new JSONArray(res_json_obj.get("list").toString());
    log.info("响应长度:" + res_json_array.length());
    log.info("数据返回长度:" + dbd_json_array.length());
 
    if (res_json_array.length() == dbd_json_array.length()) {
        for (in