Composite Check in Java

1import java.util.Scanner;
2
3public class Main {
4    private static boolean isComposite(int n) {
5        if (n <= 3) return false;
6        for (int i = 2; i * i <= n; i++) {
7            if (n % i == 0) return true;
8        }
9        return false;
10    }
11
12    public static void main(String[] args) {
13        Scanner sc = new Scanner(System.in);
14        System.out.print("Enter a number: ");
15        int n = sc.nextInt();
16
17        if (isComposite(n)) {
18            System.out.println(n + " is Composite");
19        } else {
20            System.out.println(n + " is not Composite");
21        }
22        sc.close();
23    }
24}