Convert List to CopyOnWriteArraySet

Question

Did a bunch of searching but came up blank. I'm using GreenDao within my app and am querying my database in a specific method which results in a list. I'd like to convert that list to a copyonwritearrayset. Is there a simple way to do this that I'm just not seeing?

At this point the only thing I can think to do is go item by item in a for loop:

List<Item> list = mItemDao.queryBuilder().orderDesc(ItemDao.Properties._id)
                    .list();
            CopyOnWriteArraySet<Item> set = new CopyOnWriteArraySet<Item>();

            for (Item item : list) {
                set.add(item);
            }
return set;

possible duplicate of [Easiest way to convert a List to a Set? - Java](http://stackoverflow.com/questions/1429860/easiest-way-to-convert-a-list-to-a-set-java) — m0skit0, May 03 '14 at 19:29
@m0ski0 it's definitely a duplicate :) When I searched, I couldn't find anything, but when I posted, that link came up as a related question. — Psest328, May 03 '14 at 19:32

score 0 · Accepted Answer · answered May 03 '14 at 19:26

0

What about Collection<E>#addAll(Collection<? extends E>)

set.addAll(list)

answered May 03 '14 at 19:26

m0skit0

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That works. I'm posting another answer I found as soon as I submitted the question, lol. I'm giving you the check because this is a working answer :) – Psest328 May 03 '14 at 19:28

score 0 · Answer 2 · edited May 23 '17 at 12:11

0

All my searching turned up nothing, but once I posted the question, one of the related links that came up was the exact same question I had. I'm going to go bang my head against the wall and move on.

Here's the answer to my question:

Easiest way to convert a List to a Set in Java

edited May 23 '17 at 12:11

Community

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answered May 03 '14 at 19:28

Psest328

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Convert List to CopyOnWriteArraySet

2 Answers2