撰寫支援多語系的 Java 程式

參考：
http://www.excelsior-usa.com/articles/localization.html
http://www.ibm.com/developerworks/library/j-i18n.html
http://java.sun.com/javase/technologies/core/basic/intl/
http://java.sun.com/docs/books/tutorial/i18n/index.html