Returns the parent locale of a given locale. : Locale « I18N « Java

Returns the parent locale of a given locale.


 * $Id: 667964 2008-06-15 15:00:54Z apetrelli $
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

 * Utilities for locale manipulation.
 * @version $Rev: 667964 $ $Date: 2008-06-15 17:00:54 +0200 (Sun, 15 Jun 2008) $
 * @since 2.1.0

public class Main {

   * The "null" Locale, i.e. a Locale that points to no real locale.
   * @since 2.1.0
  public static final Locale NULL_LOCALE = new Locale("");
   * <p>
   * Returns the "parent" locale of a given locale.
   * </p>
   * <p>
   * If the original locale is only language-based, the {@link #NULL_LOCALE}
   * object is returned.
   * </p>
   * <p>
   * If the original locale is {@link #NULL_LOCALE}, then <code>null</code>
   * is returned.
   * </p>
   * @param locale The original locale.
   * @return The parent locale.
  public static Locale getParentLocale(Locale locale) {
      Locale retValue = null;
      String language = locale.getLanguage();
      String country = locale.getCountry();
      String variant = locale.getVariant();
      if (!"".equals(variant)) {
          retValue = new Locale(language, country);
      } else if (!"".equals(country)) {
          retValue = new Locale(language);
      } else if (!"".equals(language)) {
          retValue = NULL_LOCALE;

      return retValue;



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