Method main

concurrent/ParallelPrime.java:18–31

(String[] args)

      .noneMatch(i -> n % i == 0);
  }
  public static void main(String[] args)
    throws IOException {
    Timer timer = new Timer();
    List<String> primes =
      iterate(2, i -> i + 1)
        .parallel()                       // [1]
        .filter(ParallelPrime::isPrime)
        .limit(COUNT)
        .mapToObj(Long::toString)
        .collect(Collectors.toList());
    System.out.println(timer.duration());
    Files.write(Paths.get("primes.txt"), primes,
      StandardOpenOption.CREATE);
  }
}
/* Output:
1635