Examples of com.ibm.icu.util.ULocale

com.ibm.icu.util.ULocale
A class analogous to {@link java.util.Locale} that provides additionalsupport for ICU protocol. In ICU 3.0 this class is enhanced to support RFC 3066 language identifiers.
Many classes and services in ICU follow a factory idiom, in which a factory method or object responds to a client request with an object. The request includes a locale (the requested locale), and the returned object is constructed using data for that locale. The system may lack data for the requested locale, in which case the locale fallback mechanism will be invoked until a populated locale is found (the valid locale). Furthermore, even when a populated locale is found (the valid locale), further fallback may be required to reach a locale containing the specific data required by the service (the actual locale).
ULocale performs 'normalization' and 'canonicalization' of locale ids. Normalization 'cleans up' ICU locale ids as follows:
- language, script, country, variant, and keywords are properly cased
  (lower, title, upper, upper, and lower case respectively)
- hyphens used as separators are converted to underscores
- three-letter language and country ids are converted to two-letter equivalents where available
- surrounding spaces are removed from keywords and values
- if there are multiple keywords, they are put in sorted order
Canonicalization additionally performs the following:
- POSIX ids are converted to ICU format IDs
- 'grandfathered' 3066 ids are converted to ICU standard form
- 'PREEURO' and 'EURO' variants are converted to currency keyword form, with the currency id appropriate to the country of the locale (for PREEURO) or EUR (for EURO).
All ULocale constructors automatically normalize the locale id. To handle POSIX ids, canonicalize can be called to convert the id to canonical form, or the canonicalInstance factory method can be called.

This class provides selectors {@link #VALID_LOCALE} and {@link #ACTUAL_LOCALE} intended for use in methods namedgetLocale(). These methods exist in several ICU classes, including {@link com.ibm.icu.util.Calendar}, {@link com.ibm.icu.util.Currency}, {@link com.ibm.icu.text.UFormat}, {@link com.ibm.icu.text.BreakIterator}, {@link com.ibm.icu.text.Collator}, {@link com.ibm.icu.text.DateFormatSymbols}, and {@link com.ibm.icu.text.DecimalFormatSymbols} and their subclasses, ifany. Once an object of one of these classes has been created, getLocale() may be called on it to determine the valid and actual locale arrived at during the object's construction.
Note: The getLocale() method will be implemented in ICU 3.0; ICU 2.8 contains a partial preview implementation. The actual locale is returned correctly, but the valid locale is not, in most cases. @see java.util.Locale @author weiv @author Alan Liu @author Ram Viswanadha @stable ICU 2.8

  // Some locales use localized digits and so even a simple pattern will be formatted
  // differently than in English.
  // The following is a simple example for Hindi.
  public void testHindiLocale() {
    ValueFormatter dateFormatter = ValueFormatter.createFromPattern(
        ValueType.DATE, "MM | dd | yyyy", new ULocale("hi_IN"));
    DateValue dateValue = new DateValue(2009, 1, 2);
    String dateString =
        "\u0966\u0968\u0020\u007c\u0020\u0966\u0968\u0020\u007c\u0020\u0968\u0966\u0966\u096f";
    assertEquals(dateString, dateFormatter.format(dateValue));
    assertEquals(dateValue, dateFormatter.parse(dateString));

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  /*
   * Create a locale from localeID.
   * Then return the appropriate collator for the locale.
   */
  private Collator createFromLocale(String localeID) {
    return Collator.getInstance(new ULocale(localeID));
  }

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   *
   * The default is DIN 5007-1, this shows how to tailor a collator to get DIN 5007-2 behavior.
   *  http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4423383
   */
  public void testCustomRules() throws Exception {
    RuleBasedCollator baseCollator = (RuleBasedCollator) Collator.getInstance(new ULocale("de_DE"));


    String DIN5007_2_tailorings =
      "& ae , a\u0308 & AE , A\u0308"+
      "& oe , o\u0308 & OE , O\u0308"+
      "& ue , u\u0308 & UE , u\u0308";

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        ArrayList<ULocale> ulocales = new ArrayList<ULocale>();
        for (String locale : locales) {
            if (locale != null) {
                try {
                    ULocale ulocale = ULocale.forLanguageTag(locale);
                    if (!ulocale.getLanguage().equals(""))
                        ulocales.add(ulocale);
                } catch (Exception e) {
                    // There can be intermittent problems with the internal
                    // functioning of the ULocale class with some
                    // language tags; best to just log these and continue

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     * @param tag
     * @return true if a valid language tag, otherwise false
     */
    public static boolean isValidLanguageTag(String tag) {
        try {
            ULocale locale = ULocale.forLanguageTag(tag);
            if (locale.toLanguageTag() == null) {
                return false;
        }
            // We don't accept "x" extensions (private use tags)
            if (locale.getExtension("x".charAt(0)) != null) {
                return false;
        }
            if (!locale.toLanguageTag().equalsIgnoreCase(tag)) {
                return false;
        }
            return true;
        } catch (Exception e) {
            return false;

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            languageCode = "";
            countryCode = "";
            variantCode = variant;
            return;
        }
        this.uLocale = new ULocale(language, country, variant);
        languageCode = uLocale.getLanguage();
        // Map new language codes to the obsolete language
        // codes so the correct resource bundles will be used.
        if (languageCode.equals("he")) {//$NON-NLS-1$
            languageCode = "iw"; //$NON-NLS-1$

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    private void expect(String[] data, int data_length) {
        int i = 1;
        while (i<data_length) {
            String locName = data[i++];
            ULocale loc = new ULocale(locName);
            SimpleDateFormat ref = new SimpleDateFormat(data[0], loc);
            // 'f'
            String datestr = data[i++];
            String datestr_2 = data[i++];
            Date date, date_2;

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    private void expectUserDII(String[] data, int data_length) {
        int i = 1;
        while (i<data_length) {
            String locName = data[i++];
            ULocale loc = new ULocale(locName);
            SimpleDateFormat ref = new SimpleDateFormat(data[0], loc);
            // 'f'
            String datestr = data[i++];
            String datestr_2 = data[i++];
            Date date, date_2;

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    private void expectUserCLDR(String[] data, int data_length) {
        int i = 1;
        while (i<data_length) {
            String locName = data[i++];
            ULocale loc = new ULocale(locName);
            SimpleDateFormat ref = new SimpleDateFormat(data[0], loc);
            // 'f'
            String datestr = data[i++];
            String datestr_2 = data[i++];
            Date date, date_2;

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    /*
     * Ticket#6396 DateIntervalInfo of ICU4J 4.0d3 throw NullPointerException 
     */
    public void TestT6396() {
        DateIntervalInfo dii = new DateIntervalInfo(new ULocale("th_TH"));
        try {
            // ticket#6396 reported toString() throws NullPointerException
            String diiStr = dii.toString();
            logln("new DateIntervalInfo(new ULocale(\"th_TH\")).toString() - " + diiStr);

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