Vowel letter Count - Java Language Basics

Java examples for Language Basics:char

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';
    }
}

/*
 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

Related Tutorials