将嵌入式应用程序全球化

public class Messages {
   /**
    * Property file name
    */
   private static String propertyFileName;
   /**
    * ResourceBundle associated with the property file name
    */
private static ResourceBundle resourceBundle;
   /**
    * Locale related with the selected language
    */
   private static Locale locale;
   static {
       propertyFileName = UIConstant.EN_PROPERTY_NAME;
       resourceBundle = ResourceBundle.getBundle(propertyFileName);
       locale = Locale.US;
}
   /**
    * The default constructor, preventing others to generate 
    * instance of this class.
    */
   private Messages() {
}
   /**
    * Set a new property file associated with the newName.
    * @param newName Name of the new property file
    */
   public static void setBundle(String newName) {
       propertyFileName = newName;
       resourceBundle = ResourceBundle.getBundle(propertyFileName);
       if (UIConstant.EN_PROPERTY_NAME.equals(newName)) {
           locale = Locale.US;
       } else if (UIConstant.ZH_PROPERTY_NAME.equals(newName)) {
           locale = Locale.SIMPLIFIED_CHINESE;
       } else if (UIConstant.FR_PROPERTY_NAME.equals(newName)) {
           locale = Locale.FRANCE;
       }
   }
   /**
    *
    * @param key Key in the property file for fetching value.
    * @return String value associated with the key value
    */
   public static String getString(String key) {
       String result = "";
       try {
           result = resourceBundle.getString(key);
       } catch (MissingResourceException e) {
           e.printStackTrace();
       }
       return result;
   }
   /**
    *
    * @return the Locale associated with the property file.
    */
   public static Locale getLocale() {
       return locale;
   }
}

String userIDStr = Messages.getString("label_userID"); //$NON-NLS-1$
userIDLabel.setText(userIDStr)

public class LogonUI {
   /**
    * The only instance of LogonUI class
   */
private static final LogonUI instance;
// The definition of all UI components comes following
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   static {
       instance = new LogonUI();
   }
   /**
    * Private constructor, make sure the only instance 
    * of the LogonUI class.
    * Create the components on LogonUI
    */
   private LogonUI() {
       //Create the shell object in this UI
       createShell();
       //Create the logo image
       createImage();
       //Create the userID and password-related components
       createInputArea();
       //Create the select language combo
       createCombo();
       //Create the login and exit button
       createButton();
       //Set the text on this UI
   setUIText();
   }
//The method definition createShell(), createImage(), 
createInputArea(),createButton() come following
"//
   /**
    * private method, used to create the language combo
    *
    */
   private void createCombo() {
       //create select language label and arrange it properly
       lanLabel = new Label(shell, SWT.LEFT);
"/
       //create the combo box and arrange it properly
       lanCombo = new Combo(shell, SWT.CENTER | SWT.READ_ONLY);
       "      lanCombo.addSelectionListener(new SelectionListener() {
           public void widgetSelected(SelectionEvent event) {
               Combo cb = (Combo) event.getSource();
               selectedLan = cb.getText();
               if (UIConstant.ENGLISH.equals(selectedLan)) {
                   Messages.setBundle(UIConstant.EN_PROPERTY_NAME);
               } else if (UIConstant.CHINESE.equals(selectedLan)) {
                   Messages.setBundle(UIConstant.ZH_PROPERTY_NAME);
               } else {
                   Messages.setBundle(UIConstant.FR_PROPERTY_NAME);
               }
           }
           public void widgetDefaultSelected(SelectionEvent event) {
           }
       });
       data = new FormData();
       data.top = new FormAttachment(pwdText, 10);
       data.left = new FormAttachment(35);
       data.right = new FormAttachment(95);
       lanCombo.setLayoutData(data);
   }
   /**
    * Used for setting the text displayed on the UI according 
    * to the selected language.
    */
   private void setUIText() {
       welcome = Messages.getString("TITLE_WELCOME"); //$NON-NLS-1$
       shell.setText(welcome);
       userIDStr = Messages.getString("TABLE_USERID"); //$NON-NLS-1$
       userIDLabel.setText(userIDStr);
       pwdStr = Messages.getString("TABLE_PASSWORD"); //$NON-NLS-1$
       pwdLabel.setText(pwdStr);
       lanStr = Messages.getString("TABLE_SELECTLANGUAGE"); //$NON-NLS-1$
       lanLabel.setText(lanStr);
       loginStr = Messages.getString("BUTTON_LOGIN"); //$NON-NLS-1$
       loginBtn.setText(loginStr);
       exitStr = Messages.getString("BUTTON_EXIT"); //$NON-NLS-1$
       exitBtn.setText(exitStr);
   }
// The method definition for open(), which is used to show the 
LogonUI on the screen
"/

double width = 12345.67;
NumberFormat nf = NumberFormat.getInstance(Locale.FRANCE);
nf.setMinimumFractionDigits(3);
nf.setMaximumFractionDigits(3);
String result = nf.format(width);

StringBuffer sb = new StringBuffer(result);
for (int i = 0; i < sb.length(); i++) {
 if (' ' == sb.charAt(i)) {
   sb.deleteCharAt(i);
 }
}

Number number =NumberFormat.getNumberInstance(locale).parse(str);
if (number instanceof Long){
  //Long value
}else{
  //Double value
}

  /**
    * If locale is fr_FR, check the format and delete spaces
    * @param number The number getting from input
    * @param locale The locale related with the selected language
    * @return If the format is valid, return the modified string, 
    * @else return null
    */
   public static String deleteSpaceIfFR(String number, Locale locale) {
       if (Locale.FRANCE.equals(locale)) {
           // " " should be before ","
           //Note: ' 'here is the ASCII value 0X20
           if (number.indexOf(',') > 0
               && number.indexOf(' ') > 0
               && number.lastIndexOf(' ') > number.indexOf(',')) {
               return null;
           }
           // " " should be before ","
           //Note: ' 'here is the ASCII value 0XA0
           if (number.indexOf(',') > 0
               && number.indexOf(160) > 0
               && number.lastIndexOf(160) > number.indexOf(',')) {
               return null;
           }
           //No continuous " " is allowed
           if (number.indexOf("  ") > 0) {
               System.out.println("No continuous is allowed");
               return null;
           }
           //delete all spaces in the number string
           StringBuffer sb = new StringBuffer(number);
           for (int i = 0; i < sb.length(); i++) {
               if (32 == sb.charAt(i) || (160 == sb.charAt(i))) {
                   sb.deleteCharAt(i);
               }
           }
           return sb.toString();
       } else {
           return number;
       }
   }

   /**
    * To check whether a string is a valid number string
    *
    * @param number the number string
    * @param locale the locale selected
    * @return whether the number is in valid format
    */
   public static boolean validateNumber(String number, Locale locale) {
       //empty string
       if (null == number || "".equals(number)) {
           return false;
       } else {
           // ensure no invalid character is contained in the number string
           for (int i = 0; i < number.length(); i++) {
               char c = number.charAt(i);
               boolean isallowed =
                   (c >= '0' && c <= '9') || (c == ',') || (c == '.');
               if (!isallowed) {
                   return false;
               }
           }
       }
       //for fr_FR locale
       if (Locale.FRANCE.equals(locale)) {
           //should not contain "."
           if (number.indexOf('.') >= 0) {
               return false;
           }
           //should contain "," once
           if (number.indexOf(',') > 0
               && (number.indexOf(',') != number.lastIndexOf(','))) {
               return false;
           }
           //"," can not at the last position of number
           if (number.indexOf(',') == (number.length() - 1)) {
               return false;
           }
           //"0" cannot at the first position of number else it appends with
           // ","
           if (0 == number.indexOf('0') && 1 != number.indexOf(',')) {
               return false;
           }
       }
       return true;
   }

       1 Date date = new Date();
       2 //Get the date formatter according to the selected language
       3 DateFormat df = DateFormat.getDateInstance( 
          DateFormat.LONG,Locale.SIMPLIFIED_CHINESE);
       4 TimeZone zone = TimeZone.getTimeZone("America/New_York");
       5 df.setTimeZone(zone);
       6 String dateValue = df.format(date);
                                       

                                       
       Date date = new Date();
       TimeZone zones[] =
           {
               TimeZone.getTimeZone("America/New_York"),
               TimeZone.getTimeZone("Asia/Shanghai"),
               TimeZone.getTimeZone("Europe/Paris")};
       DateFormat df =
           DateFormat.getDateTimeInstance(
               DateFormat.MEDIUM,
               DateFormat.SHORT,
               Locale.US);
       for (int i = 0; i < 3; i++) {
           df.setTimeZone(zones[i]);
           System.out.println("time:" + df.format(date));
       }

       Locale locale = Locale.FRANCE;
       double price = 12345.078;
       NumberFormat formatter = NumberFormat.getCurrencyInstance(locale);
       System.out.println(formatter.format(price));
                                       

       try {
           Number number =
               NumberFormat.getCurrencyInstance(Locale.FRANCE).parse(
                   "12 345, 08 ??");
           System.out.println(number);
       } catch (ParseException e) {
           e.printStackTrace();
       }