How do I split and iterate over a list

In this Q&A, we'll go over how to split and iterate over the sub-collection using Spliterator

Java 8 Collection classes provide a method -spliterator()- to create a Spliterator.  Spliterator.trySplit() will split the collection.  One can iterate over the sub-collection using tryAdvance() or forEachRemaining() methods

See demo code below

List<String> ll = Arrays.asList("1a", "2a", "3a", "4a", "5a", "6a" );

Spliterator<String> s = ll.spliterator();

assertEquals("spliterator size match", 6, s.getExactSizeIfKnown());

Spliterator<String> s2 = s.trySplit();

assertEquals("spliterator size match", 3, s.getExactSizeIfKnown());

assertEquals("spliterator size match", 3, s2.getExactSizeIfKnown());

s.forEachRemaining(item->System.out.println(item));

s2.forEachRemaining(item->System.out.println(item));