// https://e.printstacktrace.blog/divide-a-list-to-lists-of-n-size-in-Java-8/
final List<Integer> numbers = Arrays.asList(1,2,3,4,5,6,7);
final int chunkSize = 3;
//Google
Lists.partition(new ArrayList<>(numbers), chunkSize);
//Apache Commons
ListUtils.partition(new ArrayList<>(numbers), chunkSize);