1. Java I18n and Unicode JaxJug lightning talk 4/15/09

2. Java I18n Native support for Unicode Localization o Create properties files o Locale object o ResourceBundles Other locale-dependent data

3. Issues But what about when you are talking to someone else? o Different encodings o BE and LE String s = new String(buffer, "UTF8"); s.getBytes("UTF8") public String parseMessage(byte[] buffer) { StringBuffer buffer = new StringBuffer(); try { InputStreamReader is = new InputStreamReader(new ByteArrayInputStream(buffer), "UTF-16LE")); BufferedReader br = new BufferedReader(is); int ch; while ((ch = br.read() != -1) { buffer.append((char)ch); } br.close(); return buffer.toString(); } catch (IOException e) { e.printStackTrace(); return null; }

4. Converting Unicode import java.io.*; public class UnicodeFormatter { static public String byteToHex(byte b) { // Returns hex String representation of byte b char hexDigit[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; char[] array = { hexDigit[(b >> 4) & 0x0f], hexDigit[b & 0x0f] }; return new String(array); } static public String charToHex(char c) { // Returns hex String representation of char c byte hi = (byte) (c >>> 8); byte lo = (byte) (c & 0xff); return byteToHex(hi) + byteToHex(lo); } (from http://java.sun.com/docs/books/tutorial/i18n/)

5. Regular Expressions and Unicode What is a character? o Ñ ==  \u00F1  OR  \u006E \u0303 Matching graphemes -. Canonical equivalence o Pattern.compile (pattern, CANON_EQ); http://www.regular-expressions.info/unicode.html