Java Collections.sort - help me remove the unchecked warning
apache-commons-beanutils, comparator, generics, java
Solution
Options are:
- Change `BeanComparator` to implement `Comparator<Question>`. This is not a real option here, given it is a well-known external library class. People ain't going to let you do it.
- Fork and modify `BeanComparator` as above, giving it a different FQN.
- Wrap the existing `BeanComparator` with a class that implements `Comparator<Question>`.
- Change the type of `questions` to `List<?>`.
- Add a suppress warnings annotation.
Problem
``` List<Question> questions = new ArrayList<Question>(); questions.addAll(getAllQuestions()); //returns a set of Questions Collections.sort(questions, new BeanComparator("questionId")); //org.apache.commons.beanutils.BeanComparator ``` Under Java 1.5, the above works fine except that the 'new BeanComparator("questionId")' generates an unchecked warning. I do not like warnings. Is there a way I can provide the BeanComparator a type, or do I have to use `@SuppressWarnings("unchecked")`?