[KSC5601] isKSC5601 API - How to check KSC5601?

public static boolean isKSC5601(String data) { int len = data.length(); char c; for (int i = 0; i < len; i++) { c = data.charAt(i); if (((c & 0xFFFF) >= 0xAC00) && ((c & 0xFFFF) <= 0xD7A3)) return true; } return false; } public static boolean isKSC5601(byte[] data) { char[] c = byteToCharArray(data); for (int i = 0; i < c.length; i++) { if (((c[i] & 0xFFFF) >= 0xAC00) && ((c[i] & 0xFFFF) <= 0xD7A3)) return true; } return false; }