// streams/Prime.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.stream.*;

import static java.util.stream.LongStream.*;

public class Prime {

public static boolean isPrime(long n) {

return rangeClosed(2, (long)Math.sqrt(n))

.noneMatch(i -> n % i == 0);

}

public LongStream numbers() {

return iterate(2, i -> i + 1)

.filter(Prime::isPrime);

}

public static void main(String[] args) {

new Prime().numbers()

.limit(10)

.forEach(n -> System.out.format("%d ", n));

System.out.println();

new Prime().numbers()

.skip(90)

.limit(10)

.forEach(n -> System.out.format("%d ", n));

}

}

/* Output:

2 3 5 7 11 13 17 19 23 29

467 479 487 491 499 503 509 521 523 541

*/