Java Spliterator interface

Introduction

A spliterator cycles through a sequence of elements.

Spliterator supports parallel programming.

Spliterator supports a streamlined way to combine the hasNext() and next() operations into one method. 

 P:Full source

// A simple Spliterator demonstration. 
import java.util.ArrayList;
import java.util.Spliterator; 
 
public class Main { 

  public static void main(String args[]) { 
    // Create an array list for doubles. 
    ArrayList<Double> vals = new ArrayList<>(); 
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    // Add values to the array list. 
    vals.add(1.0); 
    vals.add(2.0); 
    vals.add(3.0); 
    vals.add(4.0); 
    vals.add(5.0); 
 
    // Use tryAdvance() to display contents of vals. 
    System.out.print("Contents of vals:\n"); 
    Spliterator<Double> spltitr = vals.spliterator(); 
    while(spltitr.tryAdvance((n) -> System.out.println(n)));
    System.out.println();  

    // Create new list that contains square roots. 
    spltitr = vals.spliterator(); 
    ArrayList<Double> sqrs = new ArrayList<>();
    while(spltitr.tryAdvance((n) -> sqrs.add(Math.sqrt(n))));

    // Use forEachRemaining to display contents of sqrs. 
    System.out.print("Contents of sqrs:\n"); 
    spltitr = sqrs.spliterator(); 
    spltitr.forEachRemaining((n) -> System.out.println(n));
    System.out.println();  
  }
}



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