java program- Vowels And Consonants

public class VowelsAndConsonants {
  public static void main(String[] args) {
    for(int i = 0; i < 100; i++) {
      char c = (char)(Math.random() * 26 + 'a');
      System.out.print(c + ": ");
      switch(c) {
      case 'a':
      case 'e':
      case 'i':
      case 'o':
      case 'u':
                System.out.println("vowel");
                break;
      case 'y':
      case 'w':
                System.out.println(
                  "Sometimes a vowel");
                break;
      default:
                System.out.println("consonant");
      }
    }
  }
}