Examples of java.text.Collator

java.text.Collator
are two strings in the default locale Collator myCollator = Collator.getInstance(); if( myCollator.compare("abc", "ABC") < 0 ) System.out.println("abc is less than ABC"); else System.out.println("abc is greater than or equal to ABC");
You can set a Collator's strength property to determine the level of difference considered significant in comparisons. Four strengths are provided: PRIMARY, SECONDARY, TERTIARY, and IDENTICAL. The exact assignment of strengths to language features is locale dependant. For example, in Czech, "e" and "f" are considered primary differences, while "e" and "ě" are secondary differences, "e" and "E" are tertiary differences and "e" and "e" are identical. The following shows how both case and accents could be ignored for US English.
```
 //Get the Collator for US English and set its strength to PRIMARY Collator usCollator = Collator.getInstance(Locale.US); usCollator.setStrength(Collator.PRIMARY); if( usCollator.compare("abc", "ABC") == 0 ) { System.out.println("Strings are equivalent"); } 
```
For comparing Strings exactly once, the compare method provides the best performance. When sorting a list of Strings however, it is generally necessary to compare each String multiple times. In this case, CollationKeys provide better performance. The CollationKey class converts a String to a series of bits that can be compared bitwise against other CollationKeys. A CollationKey is created by a Collator object for a given String.
Note: CollationKeys from different Collators can not be compared. See the class description for {@link CollationKey}for an example using CollationKeys. @see RuleBasedCollator @see CollationKey @see CollationElementIterator @see Locale @version 1.46, 07/23/06 @author Helena Shih, Laura Werner, Richard Gillam

  public boolean equals(Object other) {


    if (other instanceof RangeCollatorAttributeImpl) {
      RangeCollatorAttributeImpl rangeCollatorAttr = (RangeCollatorAttributeImpl) other;
      
      Collator thisCollator = getRangeCollator();
      Collator otherCollator = rangeCollatorAttr.getRangeCollator();


      if (otherCollator == thisCollator
          || otherCollator.equals(thisCollator)) {


        return true;


      }

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  }


  @Override
  public int hashCode() {
    Collator collator = getRangeCollator();
    return (collator == null) ? 0 : collator.hashCode();
  }

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  }
  
  public void testThreadSafe() throws Exception {
    int iters = 20 * RANDOM_MULTIPLIER;
    for (int i = 0; i < iters; i++) {
      Collator collator = Collator.getInstance(Locale.GERMAN);
      collator.setStrength(Collator.PRIMARY);
      assertThreadSafe(new CollationKeyAnalyzer(collator));
    }
  }

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    RangeCollatorAttribute rangeCollatorAttr = config
        .addAttribute(RangeCollatorAttribute.class);


    Assert.assertTrue(null == rangeCollatorAttr.getRangeCollator());
    Assert.assertTrue(null == config.get(ConfigurationKeys.RANGE_COLLATOR));
    Collator collator = new Collator() {


      @Override
      public int compare(String arg0, String arg1) {
        return 0;
      }

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      boolean inclusive = false;
      
      Locale locale = getQueryConfigHandler().get(ConfigurationKeys.LOCALE,
          Locale.getDefault());
      
      Collator collator = getQueryConfigHandler().get(
          ConfigurationKeys.RANGE_COLLATOR);
      
      
      CharSequence field = parametricRangeNode.getField();
      String fieldStr = null;

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    QueryParser qp = new QueryParser(TEST_VERSION_CURRENT, "content", new WhitespaceAnalyzer(TEST_VERSION_CURRENT));


    // Neither Java 1.4.2 nor 1.5.0 has Farsi Locale collation available in
    // RuleBasedCollator.  However, the Arabic Locale seems to order the Farsi
    // characters properly.
    Collator c = Collator.getInstance(new Locale("ar"));
    qp.setRangeCollator(c);


    // Unicode order would include U+0633 in [ U+062F - U+0698 ], but Farsi
    // orders the U+0698 character before the U+0633 character, so the single
    // index Term below should NOT be returned by a ConstantScoreRangeQuery

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    // Neither Java 1.4.2 nor 1.5.0 has Farsi Locale collation available in
    // RuleBasedCollator. However, the Arabic Locale seems to order the
    // Farsi
    // characters properly.
    Collator c = Collator.getInstance(new Locale("ar"));
    qp.setRangeCollator(c);


    // Unicode order would include U+0633 in [ U+062F - U+0698 ], but Farsi
    // orders the U+0698 character before the U+0633 character, so the
    // single

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     * If it does, the tests that use Swedish locale will fail.
     *
     * @return true if the bug is present, false otherwise
     */
    private static boolean hasBuggySwedishLocale() {
        Collator c = Collator.getInstance(new Locale("sv"));
        if (c.compare("aa", "ab") < 0) {
            // OK, aa should be less than ab with Swedish collation
            return false;
        } else {
            // this is a bug
            return true;

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            m_sorter = new PageSorter( HumanComparator.DEFAULT_HUMAN_COMPARATOR );
        }
        else
            try
            {
                Collator collator = new RuleBasedCollator( order );
                collator.setStrength( Collator.PRIMARY );
                m_sorter = new PageSorter( new CollatorComparator( collator ) );
            }
            catch( ParseException pe )
            {
                log.info( "Failed to parse requested collator - using default ordering", pe );

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                          //System.out.println("File ADDDED !!!!");
                        }
                    }
                    Collections.sort(files, new Comparator() {
                        public int compare(Object arg0, Object arg1) {
                            Collator comp = Collator.getInstance(Locale.US);
                            comp.setStrength(Collator.PRIMARY);
                            return comp.compare(((StoredFile) arg0).getName().toLowerCase(), ((StoredFile) arg1).getName().toLowerCase() );
                        }
                    });
                    folder.setStoredFiles(files);
                    
                    this.isStoredFilesInit = true;

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