Java program that takes the user to provide a single character from the alphabet. Print Vowel or Consonant, depending on the user input | infoStud blogs

Objective

Write a Java program that takes the user to provide a single character from the alphabet. Print Vowel or Consonant, depending on the user input. If the user input is not a letter (between a and z or A and Z), or is a string of length > 1, print an error message. 

Sample Input

Input: A

Output: Input letter is Vowel

Input: B

Output: Input letter is Consonant

Code

import java.util.Scanner;

public class UpperLower {

    public static void main(String[] args)

    {

        Scanner in = new Scanner(System.in);

        System.out.print("Input an alphabet: ");

        String input = in.next().toLowerCase();

        boolean uppercase = input.charAt(0) >= 65 && 

input.charAt(0) <= 90;

        boolean lowercase = input.charAt(0) >= 97 && 

input.charAt(0) <= 122;

        boolean vowels = input.equals("a") || input.equals("e") || 

input.equals("i")

                || input.equals("o") || input.equals("u");

        if (input.length() > 1)

        {

            System.out.println("Error. Not a single character.");

        }

        else if (!(uppercase || lowercase))

        {

            System.out.println("Error. Not a letter. Enter 

uppercase or lowercase letter.");

        }

        else if (vowels)

        {

            System.out.println("Input letter is Vowel");

        }

        else

        {

            System.out.println("Input letter is Consonant");

        }

    }

}

Output

Input an alphabet: A

Input letter is Vowel