Vowels

import java.util.Scanner;

public class Vowels
{
  public static void main(String[] args)
  {
    Scanner in = new Scanner(System.in);
    System.out.println("Please enter a sentence:");
    String sentence = in.nextLine(); //user inpt
    // vowels a, e, i, o, u, y

    int sentenceLenght = sentence.length();
    int vowelsCount = 0;

    for (int i = 0; i < sentenceLenght; i++) {
      char character = sentence.charAt(i);
      switch (character) {
        case 'a':
        case 'e':
        case 'i':
        case 'o':
        case 'u':
        case 'y':
          vowelsCount++;
          break;
      }
    }

    if (vowelsCount > 0) {
      System.out.println("Number of vowels: " + vowelsCount);
    } else {
      System.out.println("There are no vowels in the sentence!");
    }

  }
}