Korean lanauge Utils

InitialConsonantExtractor.java

public class InitialConsonantExtractor {
	private static final char[] INITIAL_CONSONANT =
	{'ㄱ', 'ㄲ', 'ㄴ', 'ㄷ', 'ㄸ', 'ㄹ', 'ㅁ', 'ㅂ', 'ㅃ', 'ㅅ', 'ㅆ', 'ㅇ', 'ㅈ', 'ㅉ', 'ㅊ', 'ㅋ', 'ㅌ', 'ㅍ', 'ㅎ'};
	public static final int NUMBER_OF_FINAL_CONSONANT = 28;
	public static final int NUMBER_OF_VOWEL = 21;

	public static boolean isKorean(char ch) {
		return (ch >= '가' && ch <= '힣');
	}

	public static char extract(String word) {
		char initialCharacter = word.charAt(0);
		if (isKorean(initialCharacter)) {
			int indexOfFirstConsonant = ((initialCharacter - '가') / (NUMBER_OF_VOWEL * NUMBER_OF_FINAL_CONSONANT));
			return INITIAL_CONSONANT[indexOfFirstConsonant];
		}
		return initialCharacter;
	}
}