24 lines
1.1 KiB
Java
24 lines
1.1 KiB
Java
import java.time.Instant;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Random;
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public class ParallelExample {
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public static void main(String[] args) {
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Random random = new Random();
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final List<Integer> LARGE_LIST = new ArrayList<>(100000000);
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for (int i = 0; i < 100000000; i++)
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LARGE_LIST.add(random.nextInt(10000));
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Instant startTime = Instant.now();
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int largestNumber = LARGE_LIST.stream().reduce(0, (result, current) -> result > current ? result : current);
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long totalTime = Duration.between(startTime,Instant.now()).toMillis();
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Instant parallelStartTime = Instant.now();
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int largestNumberParallel = LARGE_LIST.parallelStream().reduce(0, (result, current) -> result > current ? result : current, Integer::max);
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long totalTimeParallel = Duration.between(parallelStartTime,Instant.now()).toMillis();
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System.out.println("Largest number sequential : " + largestNumber + " time : " + totalTime);
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System.out.println("Largest number parallel : " + largestNumberParallel + " time : " + totalTimeParallel);
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}
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} |