Difference Between Iterator and Spliterator in Java

Iterator and split iterator both interface are used for iterating over the collection.

Split iterator is introduced in Java 8 for achieving parallelism. It can split the given set of element and can perform operation parallely using different independent threads. It can traverse the elements parallely as well as sequentially manner. There are following important methods in the splitIterator interface −

• trySplit - It is used for split the given set of elements into multiple pieces.
• tryAdvance - It is equivalent to the hasNext/ next methods available in Iterator interface
• getExactSizeIfKnown <> -It is used to get the size of the given set of elements.

Example of Spliterator

public class Main {
   public static void main(String args[]) {
      List<Integer> listOfInteger = new ArrayList<>();
      listOfInteger.add(78);
      listOfInteger.add(10);
      listOfInteger.add(20);
      listOfInteger.add(30);

      Spliterator<Integer> s = listOfInteger.spliterator();
      Spliterator<Integer> s1 = s.trySplit();

      s.forEachRemaining(System.out::println);
      System.out.println("Traverse Second Half ");
      s1.forEachRemaining(System.out::println);
   }
}