24 lines
688 B
Java
24 lines
688 B
Java
// arrays/ParallelPrefix3.java
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// (c)2021 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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// {ExcludeFromTravisCI}
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import java.util.*;
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public class ParallelPrefix3 {
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static final int SIZE = 10_000_000;
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public static void main(String[] args) {
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long[] nums = new long[SIZE];
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Arrays.setAll(nums, n -> n);
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Arrays.parallelPrefix(nums, Long::sum);
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System.out.println("First 20: " + nums[19]);
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System.out.println("First 200: " + nums[199]);
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System.out.println("All: " + nums[nums.length-1]);
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}
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}
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/* Output:
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First 20: 190
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First 200: 19900
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All: 49999995000000
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*/
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