Functional java

import java.util.function.IntPredicate;
import java.util.stream.IntStream;

/**
 *
 * @author toffe boy Aamir
 */
public class Funktional {

    private static boolean isPrime(final int number) {
        IntPredicate isDivisible = divisor -> number % divisor == 0;//function in a function (Believe it or not)

        return number > 1 &&
                IntStream.range(2, number).
                noneMatch(isDivisible::test);
    }

    public static void main(String[] args) {
        System.out.println(isPrime(1));
        System.out.println(isPrime(2));
        System.out.println(isPrime(3));
        System.out.println(isPrime(4));
    }
}