How do I sort a List of TreeSets with java8 streams

Question

My list contains sets like [1,3,5][2,6,4] etc, all of the same size. I tried doing this but it doesn\'t seem to work.

List&g         


        

Answer 1

If you have guava on the classpath this is a breeze:

        block
            .stream()
            .flatMap(Set::stream)
            .collect(Collectors.toCollection(TreeSet::new));

    Iterable> result = Iterables.partition(sorted, 3);