Prime Number

import java.util.stream.IntStream;

public class PrimeNumber {

    

     public static void main(String[] args) {

          PrimeNumber primeNumber = new PrimeNumber();

          System.out.println(primeNumber.isPrime(2));

          System.out.println(primeNumber.isPrime(9));

     }

    

     public boolean isPrime(int number) {

          if (number > 1) {

               return !IntStream.rangeClosed(2, (int) Math.sqrt(number)).anyMatch(x -> number % x == 0);

          }

          return false;

     }

}

Output:

true

false