Count Vowels Using Recursion

VowelsRecursion.java

/*
Write a program to accept a word using String accept() function
and count the number of vowels in the word using int vowels(String, int) recursive function
and display the word and the frequency of vowels in the word using void display(String, int) function.
*/

import java.util.Scanner;

class VowelsRecursion {

    String accept() {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter a word: ");
        return in.nextLine();
    }

    int vowels(String word, int length) {
        if (length == 0)
            return 0;

        else {
            if (word.charAt(length) == 'a' || word.charAt(length) == 'e' || word.charAt(length) == 'i'
                    || word.charAt(length) == 'o' || word.charAt(length) == 'u')
                return 1 + vowels(word, length - 1);
            else
                return vowels(word, length - 1);
        }
    }

    void display(String word, int count) {
        System.out.println("Word: " + word);
        System.out.println("Number of vowels: " + count);
    }

    public static void main(String[] args) {
        VowelsRecursion obj = new VowelsRecursion();
        String sen = obj.accept();
        obj.display(sen, obj.vowels(sen.toLowerCase(), sen.length() - 1));
    }
}