How to sort an ArrayList?

Question

I have a List of doubles in java and I want to sort ArrayList in descending order.

Input ArrayList is as below:

List testList = new Arr         


        

Answer 1

You can do like this:

List yourList = new ArrayList();
Collections.sort(yourList, Collections.reverseOrder());

Collection has a default Comparator that can help you with that.

Also, if you want to use some Java 8 new features, you can do like that:

List yourList = new ArrayList();
yourList = yourList.stream().sorted(Collections.reverseOrder()).collect(Collectors.toList());