Java Stream API を使って, 100以下の素数を表示させる

Prime.java

import java.util.stream.IntStream;

public class Prime {

    public static void main(String[] args){
        // System.out.println(isPrime(51));
        primesUnder(100).forEach(x -> System.out.print(x+","));
    }

    private static IntStream primesUnder(int n) {
        IntStream s = IntStream.range(2,n)
                        .filter(x -> isPrime(x));
        return s;
    }
    
    private static boolean isPrime(int n) {
        if (n<2) {return false;}
        double m = Math.sqrt((double) n);
        for (int i=2;i<=m;i++) {
            if (n%i==0) {return false;}
        }
        return true;
    }

}