Converting HashMap to ArrayList
I just want to move the transitionHash map values into the cardholderDataRecords arraylist.
HashMap<String,ExceptionLifeCycleDataBean> transitionHash = new HashMap<String,ExceptionLifeCycleDataBean>();
ArrayList<ExceptionLifeCycleDataBean> cardholderDataRecords = new ArrayList<ExceptionLifeCycleDataBean>();
i am doing as
cardholderDataRecords.add((ExceptionLifeCycleDataBean) transitionHash.values());
It's throwing
java.lang.ClassCastException: java.util.HashMap$Values cannot be cast to com.reportss.bean.ExceptionLifeCycleDataBean
Solution 1:
You're trying to cast the collection of values to a single ExceptionLifeCycleDataBean
.
You can very easily get the list though:
List<ExceptionLifeCycleDataBean> beans =
new ArrayList<ExceptionLifeCycleDataBean>(transitionHash.values());
Or to add to an existing collection, with:
cardholderDataRecords.addAll(transitionHash.values());
No casts necessary.