将HashMap转换为ArrayList

Question

我只想将transitionHash映射值移动到cardholderDataRecords arraylist中.

HashMap<String,ExceptionLifeCycleDataBean> transitionHash = new HashMap<String,ExceptionLifeCycleDataBean>();

ArrayList<ExceptionLifeCycleDataBean> cardholderDataRecords = new ArrayList<ExceptionLifeCycleDataBean>();

我正在做

cardholderDataRecords.add((ExceptionLifeCycleDataBean) transitionHash.values());

它在扔

java.lang.ClassCastException: java.util.HashMap$Values cannot be cast to com.reportss.bean.ExceptionLifeCycleDataBean

Answer 1

您正在尝试将值集合转换为单个值ExceptionLifeCycleDataBean.

您可以非常轻松地获取列表:

List<ExceptionLifeCycleDataBean> beans =
    new ArrayList<ExceptionLifeCycleDataBean>(transitionHash.values());

或者要添加到现有集合,请执行以下操作:

cardholderDataRecords.addAll(transitionHash.values());

不需要演员阵容.