Java Stream Parallel

Introduction

Demonstrate the use of a combiner with reduce() 

import java.util.ArrayList;

public class Main {

  public static void main(String[] args) {

    // This is now a list of double values.
    ArrayList<Double> myList = new ArrayList<>();

    myList.add(7.0);/*www  .j a v a 2  s.  c  om*/
    myList.add(18.0);
    myList.add(10.0);
    myList.add(24.0);
    myList.add(17.0);
    myList.add(5.0);

    double productOfSqrRoots = myList.parallelStream().reduce(1.0, (a, b) -> a * Math.sqrt(b), (a, b) -> a * b);

    System.out.println("Product of square roots: " + productOfSqrRoots);
  }
}



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