/**   @version 1.00 2004-09-15   @author Cay Horstmann*/import java.awt.*;import java.text.*;import java.util.*;import javax.swing.*;import javax.swing.event.*;/**   This combo box lets a user pick a locale. The locales are displayed in the locale of    the combo box, and sorted according to the collator of the display locale.*/public class LocaleCombo extends JComboBox{   /**      Constructs a locale combo that displays an immutable collection of locales.      @param locales the locales to display in this combo box   */   public LocaleCombo(Locale[] locales)    {      this.locales = (Locale[]) locales.clone();      sort();      setSelectedItem(getLocale());   }   public void setLocale(Locale newValue)    {       super.setLocale(newValue);       sort();   }   private void sort()   {      Object selected = getSelectedItem();      final Locale loc = getLocale();      final Collator collator = Collator.getInstance(loc);      final Comparator<Locale> comp = new         Comparator<Locale>()         {            public int compare(Locale a, Locale b)            {               return collator.compare(a.getDisplayName(loc), b.getDisplayName(loc));            }         };      Arrays.sort(locales, comp);            setModel(new         ComboBoxModel()         {            public Object getElementAt(int i) { return locales[i]; }            public int getSize() { return locales.length; }            public void addListDataListener(ListDataListener l) {}            public void removeListDataListener(ListDataListener l) {}            public Object getSelectedItem() { return selected >= 0 ? locales[selected] : null; }            public void setSelectedItem(Object anItem)             {                if (anItem == null) selected = -1;                else selected = Arrays.binarySearch(locales, (Locale) anItem, comp);                            }            private int selected;         });               setSelectedItem(selected);   }   public ListCellRenderer getRenderer()   {      if (renderer == null)      {         final ListCellRenderer originalRenderer = super.getRenderer();         if (originalRenderer == null) return null;         renderer = new             ListCellRenderer()            {               public Component getListCellRendererComponent(JList list,                  Object value, int index, boolean isSelected, boolean cellHasFocus)               {                  String renderedValue = ((Locale) value).getDisplayName(getLocale());                  return originalRenderer.getListCellRendererComponent(                     list, renderedValue, index, isSelected, cellHasFocus);               }                           };      }      return renderer;   }   public void setRenderer(ListCellRenderer newValue)   {      renderer = null;      super.setRenderer(newValue);   }   private Locale[] locales;   private ListCellRenderer renderer;}