Program to check a letter is vowel or consonant in java

import java.util.Scanner;
public class Check_letter_to_vowel_or_consonant {
public static void main(String[] args) {
String ch;
Scanner c = new Scanner(System.in);
System.out.println(“Enter letter to check vowel or consonant:”);
ch = c.next();
switch(ch){
case “a”:
case “e”:
case “i”:
case “o”:
case “u”:
case “A”:
case “E”:
case “I”:
case “O”:
case “U”:
System.out.println(“The alphabet is a vowel”);
break;
default:
System.out.println(“The alphabet is a consonant”);
}
}
}

Output:First, run:
Enter letter to check vowel or consonant:
a
The alphabet is a vowel

Second-time run:
Enter the alphabet :
d
The alphabet is a consonant