Prime Numbers in Range in Java

1public class Main {
2    private static boolean isPrime(int n) {
3        if (n <= 1) return false;
4        if (n == 2) return true;
5        if (n % 2 == 0) return false;
6        for (int i = 3; i * i <= n; i += 2) {
7            if (n % i == 0) return false;
8        }
9        return true;
10    }
11
12    public static void main(String[] args) {
13        for (int i = 1; i <= 100; i++) {
14            if (isPrime(i)) {
15                System.out.print(i + " ");
16            }
17        }
18    }
19}