Vowel letter Count - Java Language Basics

Java examples for Language Basics:char

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Description

Vowel letter Count

Demo Code

import java.util.*;

public class CountVowels {

    public static void main(String[] args) {

        if (args.length < 1) {
            System.err.println("Usage: java CountVowels <word1 word2 ...>");
            System.exit(1);/*from   w  w w .j  a  v  a  2s .  c om*/
        }

        Map<String, Integer> msi = new HashMap<>();

        for (String s : args) {
            int vowelCount = 0;
            int length = s.length();
            for (int i = 0; i < length; ++i)
                if (isVowel(s.charAt(i)))
                    ++vowelCount;

            msi.put(s, vowelCount);
        }

        Set<String> words = msi.keySet();
        for (String wd : words)
            System.out.println(wd + ": " + msi.get(wd));
    }

    public static boolean isVowel(char c) {
        return c == 'a' || c == 'A' || c == 'e' || c == 'E' || c == 'i'
                || c == 'I' || c == 'o' || c == 'O' || c == 'u' || c == 'U';
    }
}

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