Sized (original) (raw)

Kevin Bourrillion kevinb at google.com
Fri Nov 2 15:16:25 PDT 2012

On Fri, Nov 2, 2012 at 3:05 PM, Brian Goetz <brian.goetz at oracle.com> wrote:

It is useful to indicate that an aggregate knows its size (Collections

do, but not all Iterables do, and we've taken advantage of this in the Streams library)

Of course, some collections, like the key set of a ConcurrentHashMap, don't know their size any more than a garden-variety Iterable does.

So to me, this seems useful only if it is not a supertype of Collection.

-- Kevin Bourrillion | Java Librarian | Google, Inc. | kevinb at google.com