Posted By: Ankur
I am using
TreeBidiMap from the Apache Collections library. I want to sort this on the values which are
My method is to retrieve a
Collection 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
themap.getKey(iterator.next()) where the iterator will be over the list of
List list = new ArrayList(coll); Collections.sort(list);
As Erel Segal Halevi says below, if coll is already a list, you can skip step one. But that would depend on the internals of TreeBidiMap.
List list; if (coll instanceof List) list = (List)coll; else list = new ArrayList(coll);