Java Examples in a Nutshell, 3rd Edition

Exercises

• Exercise 8-1. Several internationalization-related classes, such as NumberFormat and DateFormat, have static methods named getAvailableLocales( ) that return an array of the Locale objects they support. You can look up the name of the country of a given Locale object with the getDisplayCountry( ) method. Note that this method has two variants. One takes no arguments and displays the country name as appropriate in the default locale. The other version of getDisplayCountry( ) expects a Locale argument and displays the country name in the language of the specified locale.

  Write a program that displays the country names for all locales returned by NumberFormat.getAvailableLocales( ). Using the static locale constants defined by the Locale class, display each country name in English, French, German, and Italian.

• Exercise 8-2. Modify the Portfolio class of Example 8-3 to remove all hardcoded display strings. Instead, use the ResourceBundle and MessageFormat classes as demonstrated in Examples Example 8-4 and Example 8-5.

• Exercise 8-3. Write a multicity digital clock program that displays the current date and time in the cities Washington, London, Paris, Bonn, Beijing, and Tokyo. Display the dates and times using the customary formats for those cities. You’ll want to read about the java.util.TimeZone class and the DateFormat.setTimeZone( ) method. Consult a map or search the Internet to determine the time zones for each of the cities. Write the program as an AWT or Swing application ...