HarmonyOS List提示undefined

参考示例如下：

import { List } from '@kit.ArkTS';

class HealthEvaluationBean {
  id: number = -1; //题目ID
  qmId: number = -1; //试卷ID
  title: string = '';
  type: number = -1; //选择类型 1单选 2多选
  needChoice: number = -1; //是否必须选择 0否 1是
  backgroundImg: string = ''; //背景图
  chooseIds: List<number> = new List<number>(); //记录底下列表的选择项，以此来判断单选的
}

@Entry
@Component
struct TestPage {
  @State message: string = 'Hello World';

  build() {
    Column() {
      Button("test bean").onClick(() => {
        let data = new HealthEvaluationBean()
        data.chooseIds.clear()
      })
    }
    .height('100%')
    .width('100%')
  }
}

需要实例化JSON.parse()并不会实例化对象。