Convert Collection to List

Question

I am using TreeBidiMap from the apache collections library. I want to sort this on the values which are doubles.

My method is to retrieve a Collection view of the values using Collection coll = themap.values(). Which naturally works fine. Main Question: I now want to know how I can convert/cast (not sure which is correct) coll into a List so it can be sorted.

I then intend to iterate over the sorted List object, which should be in order and get the appropriate keys from the TreeBidiMap "themap" using themap.getKey(iterator.next()) where the iterator will be over the list of doubles.

Answer 1

List list = new ArrayList(coll);
Collections.sort(list);

Answer 2

Something like this should work:

List theList = new ArrayList(coll);

Answer 3

Collections.sort( new ArrayList( coll ) );

:P