Does .asSet(...) exist in any API?

Using Guava, it is as simple as that:

Set<String> mySet = ImmutableSet.<String> of("a", "b");

Or for a mutable set:

Set<String> mySet = Sets.newHashSet("a", "b")

For more data types see the Guava user guide

Now with Java 8 you can do this without need of third-party framework:

Set<String> set = Stream.of("a","b","c").collect(Collectors.toSet());

See Collectors.

Enjoy!

Related