Count Vowels in Java

1import java.util.Scanner;
2
3public class Main {
4    private static boolean isVowel(char c) {
5        c = Character.toLowerCase(c);
6        return c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u';
7    }
8
9    public static void main(String[] args) {
10        Scanner sc = new Scanner(System.in);
11        System.out.print("Enter a string: ");
12        String s = sc.nextLine();
13
14        int count = 0;
15        for (int i = 0; i < s.length(); i++) {
16            if (isVowel(s.charAt(i))) {
17                count++;
18            }
19        }
20        System.out.println("Vowels: " + count);
21        sc.close();
22    }
23}