cast a List to a Set

[Larry Jones]

is it possible to cast a List to a Set?
for example,

List results = DbService.getList();
Set s = (Set) results;

[Dave Wingate]

I don't know of a way to do it with casting. But you can do the following since a List is a Collection

List list = someObject.getList();
Set set = new HashSet();
set.addAll(list);

Ithink this will get you what you wanted. Note that for this to work you need to make sure that the members of your list appropriately implement equals() and hashCode().

[Ilja Preuss]

Originally posted by Larry Jones:
is it possible to cast a List to a Set?
for example,

List results = DbService.getList();
Set s = (Set) results;

Only if the List object also implements the Set interface, which it most probably will not.