CS 596 Java Programming Fall Semester, 1998 Internationalization
	To Lecture Notes Index © 1998, All Rights Reserved, SDSU & Roger Whitney San Diego State University -- This page last updated 21-Dec-98

References
Internationalization

Formatting
Languages and Countries Available in JDK1.2RC1
Static and Dynamic Text
Internationalization of Text

Hello World Example with Just Classes
Hello World Example - Using Files
A More Complex Example

References

S-dec2 49secs, Q-dec3 2mins Doc 32, Internationalization Slide # 2

Internationalization

Formatting

10/13/97

13/10/97

13.10.97

1,234.56

1.234,56

1;234.56

S-dec2 3mins Doc 32, Internationalization Slide # 3

Doc 32, Internationalization Slide # 4

Locale(String language, String country)

Locale(String language, String country, String variant)

S-dec2 1min Doc 32, Internationalization Slide # 5

Languages and Countries Available in JDK1.2RC1

Doc 32, Internationalization Slide # 6

Doc 32, Internationalization Slide # 7

S-dec2 2mins, Q-dec3 5mins Doc 32, Internationalization Slide # 8

import java.text.*;
class FormatUsingLocalRules
   {
   public static void main( String args[] ) throws Exception
      {
      NumberFormat number = NumberFormat.getInstance(  );
      NumberFormat currency = 
            NumberFormat.getCurrencyInstance(  );
      DateFormat shortDate = 
            DateFormat.getDateInstance(DateFormat.SHORT);
      DateFormat fullTime = 
            DateFormat.getTimeInstance(DateFormat.FULL );
      
      System.out.println( "Number: " + number.format( 123456 ));
      System.out.println( "Currency: " + 
                              currency.format( 1234.56 ));
      System.out.println( "ShortDate: " + 
                              shortDate.format( new Date() ));
      System.out.println( "FullTime: " + 
                              fullTime.format( new Date() ));
      }
   }

S-dec2 33secs, Q-dec10 3mins Doc 32, Internationalization Slide # 9

Use the default give by the VM or

Set the default to what you want

class FormatExplicitlyCallingDifferentLocale
   {
   public static void main( String args[] )
      {
      System.out.println( "-------US English------");
      internationalPrint( Locale.getDefault() );
      System.out.println( "-------Canadian English------");
      internationalPrint( new Locale("en", "CA" ));
      System.out.println( "-------Spanish Spanish------");
      internationalPrint( new Locale("es", "ES" ));
      System.out.println( "-------German German------");
      internationalPrint( new Locale("de", "DE" ));
      }
//internationalPrint on next slide
S-dec2 53secs, Q-dec10 4mins Doc 32, Internationalization Slide # 10

   public static void internationalPrint( Locale custom )
      {
      NumberFormat number = 
               NumberFormat.getInstance( custom );
      NumberFormat currency = 
               NumberFormat.getCurrencyInstance( custom );
      DateFormat shortDate = DateFormat.getDateInstance(
                            DateFormat.SHORT, custom );
      DateFormat fullDate = DateFormat.getDateInstance( 
                           DateFormat.FULL, custom );
      DateFormat shortTime = DateFormat.getTimeInstance( 
                           DateFormat.SHORT, custom );
      DateFormat longTime = DateFormat.getTimeInstance(
                           DateFormat.LONG,custom );
      System.out.println( "Number: " + 
                        number.format( 123456 ));
      System.out.println( "Currency: " + 
                        currency.format( 1234.56 ));
      System.out.println( "ShortDate: " + 
                        shortDate.format( new Date() ));
      System.out.println( "FullDate: " + 
                        fullDate.format( new Date() ));
      System.out.println( "ShortTime: " + 
                        shortTime.format( new Date() ));
      System.out.println( "LongTime: " + 
                        longTime.format( new Date() ));
      }
   }
S-dec2 2mins Doc 32, Internationalization Slide # 11

S-dec2 1min, Q-dec10 2mins Doc 32, Internationalization Slide # 12

import java.text.*;
import java.util.Locale;
public class Test
   {
   public static void main( String args[] ) throws Exception 
      {
      Locale Spain = new Locale("es", "ES" );
      NumberFormat spanishFormat = 
               NumberFormat.getInstance( Spain );
      
      Number parsed = spanishFormat.parse( "123.456,5");
      System.out.println( parsed.floatValue() );
      
      parsed = spanishFormat.parse( "123.4.5.6,5");
      System.out.println( parsed.floatValue() );
      }
   }

S-dec2 5mins, Q-dec10 7mins Doc 32, Internationalization Slide # 13

Static and Dynamic Text

import java.text.MessageFormat;
import java.util.Date;
class Test
   {
   public static void main( String args[] ) throws Exception
      {
      Object[] dynamicText = {"Roger",new Date() };
      
      String staticText = "{0}, it is {1,time,short}";
      String publicMessage = 
         MessageFormat.format(staticText, dynamicText);
      System.out.println( publicMessage );
      }
   }

Doc 32, Internationalization Slide # 14

Internationalization of Text

S-dec7 4mins, Q-dec10 3mins Doc 32, Internationalization Slide # 15

Hello World Example with Just Classes

import java.util.ResourceBundle;
// The main program, will display either German, Spanish
// or English depending on where you run the program
class HelloWorld
   {
   public static void main( String args[] )   
      {
      ResourceBundle greetings = 
         ResourceBundle.getBundle( "Greetings" );
      
      System.out.println( greetings.getString( "hello" ));
      }
   }
// The default language, if the local language and/or country 
// can not be found this one will be used
import java.util.ListResourceBundle;
public class Greetings extends ListResourceBundle  
   {
   public Object[][] getContents()  
      {
      return new Object[][] 
         {
            { "hello", "Hello World!" },
            { "language", "English" },
            { "key", "value" } // can have as many pairs as needed
         };
      }
   }
S-dec7 1min, Q-dec10 2mins Doc 32, Internationalization Slide # 16

// Append _language code to base class name for a language
// Append _language_country to base class to indicate both 
// langauge and country
// de = 2 letter ISO-639 code for German
public class Greetings_de extends ListResourceBundle 
   {
   public Object[][] getContents()  
      {
      return new Object[][]   
         {
            { "hello", "Hallo, Welt!" },
            { "language", "Deutsch" }
         };
      }
   }
// de = 2 letter ISO-639 code for Spanish
public class Greetings_es extends ListResourceBundle 
   {
   public Object[][] getContents() 
      {
      return new Object[][]   
         {
            { "hello", "\u00A1Hola mundo!" },
            { "language", "Espa\u00F1ol" }
         };
      }
   }
// \u00A1 = inverted !   \u00BF = inverted ?
// \u00D1 = N with a tilde  \u00F1 = n with a tilde
S-dec7 6mins, Q-dec10 2mins Doc 32, Internationalization Slide # 17

import java.util.Locale;
import java.util.ResourceBundle;
class ThreeHellos
   {
   public static void main( String args[] )
      {
      foreignTest( );
      Locale.setDefault(  new Locale("es", "ES" ));
      foreignTest();
      Locale.setDefault(  new Locale("de", "DE" ));
      foreignTest( );
      }
      
   public static void foreignTest( )
      {
      ResourceBundle greetings = 
                     ResourceBundle.getBundle( "Greetings");
      
      System.out.println( "----" + 
                           greetings.getString( "language") + 
                           "----");
      System.out.println( greetings.getString( "hello" ));
      }
   }

Doc 32, Internationalization Slide # 18

public class Greetings extends ListResourceBundle  
   {
   public Object[][] getContents()  
      {
      return new Object[][] 
         {
            { "hello", "Hello World!" },
            { "language", "English" },
         };
      }
   }

public class Greetings extends ListResourceBundle  
   {
   static final Object[][] contents =
         {
            { "hello", "Hello World!" },
            { "language", "English" },
            { "key", "value" } // can have as many pairs as needed
         };
   public Object[][] getContents()  
      {
      return contents;
      }
   }

Q-dec10 7mins Doc 32, Internationalization Slide # 19

Hello World Example - Using Files

Doc 32, Internationalization Slide # 20

A More Complex Example

# \u00A1 = inverted !   
# \u00BF = inverted ?
# \u00F1 = n with a tilde

Doc 32, Internationalization Slide # 21

import java.text.MessageFormat;
import java.util.Date;
import java.util.Locale;
import java.util.ResourceBundle;
import java.util.ListResourceBundle;
class HelloWithPublicService
   {
   static Object[] dynamicData = {
         System.getProperty( "user.name" ),
         new Date()
         };
   public static void main( String args[] )
      {
      foreignTest( );
      Locale.setDefault(  new Locale("es", "ES" ));
      foreignTest();
      Locale.setDefault(  new Locale("de", "DE" ));
      foreignTest( );
      }
      
Doc 32, Internationalization Slide # 22

   public static void foreignTest( )
      {
      ResourceBundle greetings = 
            ResourceBundle.getBundle( "Greetings");
      MessageFormat publicMessage;
      publicMessage = new MessageFormat(
                              greetings.getString( "publicService"));
      
      System.out.println( "----" + greetings.getString( "language") + 
                           "----");
      System.out.println( greetings.getString( "hello" ));
      System.out.println( publicMessage.format( dynamicData ));
      }
   }

----English----
Hello World!
Roger Whitney, it is 10:11 PM, do you know where your children are?
----Español----
¡Hola mundo!
Roger Whitney, son las 6:11 -- ¿sabes donde estan tus hijos?
----Deutsch----
Hallo, Welt!
Roger Whitney, es ist 06:11. Weisst Du, wo Deine Kinder sind?

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