// arrays/ParallelPrefix1.java

// (c)2021 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

import java.util.*;

import onjava.*;

import static onjava.ArrayShow.*;

public class ParallelPrefix1 {

public static void main(String[] args) {

int[] nums = new Count.Pint().array(10);

show(nums);

System.out.println(Arrays.stream(nums)

.reduce(Integer::sum).getAsInt());

Arrays.parallelPrefix(nums, Integer::sum);

show(nums);

System.out.println(Arrays.stream(

new Count.Pint().array(6))

.reduce(Integer::sum).getAsInt());

}

}

/* Output:

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

45

[0, 1, 3, 6, 10, 15, 21, 28, 36, 45]

15

*/