2006-06-09 Thomas Fitzsimmons <fitzsim@redhat.com>

	* java/lang/String.java, classpath/native/jni/classpath/jcl.h,
	classpath/native/jni/qt-peer/eventmethods.h,
	classpath/native/jni/qt-peer/qtmenupeer.cpp,
	classpath/native/jni/qt-peer/.cvsignore,
	classpath/native/jni/gtk-peer/gdkdisplay.h,
	classpath/native/jni/gtk-peer/cairographics2d.h,
	classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_CairoGraphics2D.c,
	classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GdkFontPeer.c,
	classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_FreetypeGlyphVector.c,
	classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GdkGraphicsEnvironment.c,
	classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_ComponentGraphicsCopy.c,
	classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_ComponentGraphics.c,
	classpath/native/jni/gtk-peer/.cvsignore,
	classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkImage.c,
	classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkVolatileImage.c,
	classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkToolkit.c,
	classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkCanvasPeer.c,
	classpath/native/jni/gtk-peer/gtkpeer.h,
	classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkClipboard.c,
	classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_CairoSurface.c,
	classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GdkScreenGraphicsDevice.c,
	classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GdkTextLayout.c,
	classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkFramePeer.c,
	classpath/native/jni/gtk-peer/Makefile.am,
	classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkComponentPeer.c,
	classpath/native/jawt/Makefile.am,
	classpath/native/jawt/.cvsignore,
	classpath/native/target/Linux/Makefile.in,
	classpath/native/plugin/gcjwebplugin.cc,
	classpath/native/plugin/Makefile.am,
	classpath/native/plugin/.cvsignore,
	classpath/resource/Makefile.in,
	classpath/gnu/java/awt/peer/gtk/VolatileImageGraphics.java,
	classpath/gnu/java/awt/peer/gtk/CairoGraphics2D.java,
	classpath/gnu/java/awt/peer/gtk/CairoSurface.java,
	classpath/gnu/java/awt/peer/gtk/GdkFontPeer.java,
	classpath/gnu/java/awt/peer/gtk/GdkPixbufDecoder.java,
	classpath/gnu/java/awt/peer/gtk/FreetypeGlyphVector.java,
	classpath/gnu/java/awt/peer/gtk/GdkGraphicsEnvironment.java,
	classpath/gnu/java/awt/peer/gtk/GdkGraphics2D.java,
	classpath/gnu/java/awt/peer/gtk/ComponentGraphicsCopy.java,
	classpath/gnu/java/awt/peer/gtk/GtkComponentPeer.java,
	classpath/gnu/java/awt/peer/gtk/GdkGraphics.java,
	classpath/gnu/java/awt/peer/gtk/GtkToolkit.java,
	classpath/gnu/java/awt/peer/gtk/GdkScreenGraphicsDevice.java,
	classpath/gnu/java/awt/peer/gtk/BufferedImageGraphics.java,
	classpath/gnu/java/awt/peer/gtk/GdkTextLayout.java,
	classpath/gnu/java/awt/peer/gtk/GdkGraphicsConfiguration.java,
	classpath/gnu/java/awt/peer/gtk/ComponentGraphics.java,
	classpath/gnu/java/awt/peer/gtk/CairoSurfaceGraphics.java,
	classpath/gnu/java/awt/peer/gtk/GtkImage.java,
	classpath/gnu/java/awt/peer/gtk/GtkVolatileImage.java,
	classpath/gnu/java/awt/peer/gtk/GdkGlyphVector.java,
	classpath/gnu/java/awt/peer/gtk/GtkCanvasPeer.java,
	classpath/gnu/java/awt/peer/swing/SwingContainerPeer.java,
	classpath/gnu/java/awt/peer/swing/SwingComponent.java,
	classpath/gnu/java/awt/peer/swing/SwingTextFieldPeer.java,
	classpath/gnu/java/awt/peer/swing/SwingMenuBarPeer.java,
	classpath/gnu/java/awt/peer/swing/SwingFramePeer.java,
	classpath/gnu/java/awt/peer/swing/SwingComponentPeer.java,
	classpath/gnu/java/awt/peer/swing/SwingWindowPeer.java,
	classpath/gnu/java/awt/print/JavaPrinterJob.java,
	classpath/gnu/java/awt/print/PostScriptGraphics2D.java,
	classpath/gnu/java/awt/print/SpooledDocument.java,
	classpath/gnu/java/awt/print/JavaPrinterGraphics.java,
	classpath/gnu/java/awt/BitwiseXORComposite.java,
	classpath/gnu/java/awt/font/GNUGlyphVector.java,
	classpath/gnu/java/awt/font/opentype/NameDecoder.java,
	classpath/gnu/java/awt/java2d/RasterGraphics.java,
	classpath/gnu/java/awt/java2d/TexturePaintContext.java,
	classpath/gnu/java/awt/java2d/PolyEdge.java,
	classpath/gnu/java/awt/java2d/AbstractGraphics2D.java,
	classpath/gnu/java/awt/java2d/AlphaCompositeContext.java,
	classpath/gnu/java/awt/java2d/ImagePaint.java,
	classpath/gnu/java/awt/Buffers.java,
	classpath/gnu/classpath/Configuration.java.in,
	classpath/gnu/javax/swing/text/html/CombinedAttributes.java,
	classpath/gnu/javax/swing/text/html/CharacterAttributeTranslator.java,
	classpath/gnu/javax/swing/text/html/parser/htmlAttributeSet.java,
	classpath/gnu/javax/swing/text/html/parser/SmallHtmlAttributeSet.java,
	classpath/gnu/javax/swing/text/html/ImageViewIconFactory.java,
	classpath/tools/toolwrapper.c,
	classpath/tools/gnu/classpath/tools/native2ascii/Native2ASCII.java,
	classpath/tools/gnu/classpath/tools/native2ascii/Messages.java,
	classpath/tools/gnu/classpath/tools/getopt/FileArgumentCallback.java,
	classpath/tools/gnu/classpath/tools/getopt/OptionGroup.java,
	classpath/tools/gnu/classpath/tools/getopt/OptionException.java,
	classpath/tools/gnu/classpath/tools/getopt/Messages.java,
	classpath/tools/gnu/classpath/tools/getopt/Option.java,
	classpath/tools/gnu/classpath/tools/getopt/Parser.java,
	classpath/tools/gnu/classpath/tools/getopt/ClasspathToolParser.java,
	classpath/tools/gnu/classpath/tools/jarsigner/JarSigner.java,
	classpath/tools/gnu/classpath/tools/jarsigner/Main.java,
	classpath/tools/gnu/classpath/tools/jarsigner/Messages.java,
	classpath/tools/gnu/classpath/tools/jarsigner/package.html,
	classpath/tools/gnu/classpath/tools/keytool/ListCmd.java,
	classpath/tools/gnu/classpath/tools/keytool/StorePasswdCmd.java,
	classpath/tools/gnu/classpath/tools/keytool/ExportCmd.java,
	classpath/tools/gnu/classpath/tools/keytool/GenKeyCmd.java,
	classpath/tools/gnu/classpath/tools/keytool/Messages.java,
	classpath/tools/gnu/classpath/tools/keytool/package.html,
	classpath/tools/gnu/classpath/tools/keytool/Command.java,
	classpath/tools/gnu/classpath/tools/keytool/IdentityDBCmd.java,
	classpath/tools/gnu/classpath/tools/keytool/Main.java,
	classpath/tools/gnu/classpath/tools/keytool/DeleteCmd.java,
	classpath/tools/gnu/classpath/tools/keytool/CertReqCmd.java,
	classpath/tools/gnu/classpath/tools/keytool/SelfCertCmd.java,
	classpath/tools/gnu/classpath/tools/keytool/KeyCloneCmd.java,
	classpath/tools/gnu/classpath/tools/keytool/KeyPasswdCmd.java,
	classpath/tools/gnu/classpath/tools/keytool/ImportCmd.java,
	classpath/tools/gnu/classpath/tools/keytool/PrintCertCmd.java,
	classpath/tools/gnu/classpath/tools/rmi/registry/package.html,
	classpath/tools/gnu/classpath/tools/rmi/RMIC.txt,
	classpath/tools/gnu/classpath/tools/rmi/RMIC.java,
	classpath/tools/gnu/classpath/tools/appletviewer/ErrorApplet.java,
	classpath/tools/gnu/classpath/tools/appletviewer/AppletClassLoader.java,
	classpath/tools/gnu/classpath/tools/appletviewer/CommonAppletContext.java,
	classpath/tools/gnu/classpath/tools/appletviewer/StandaloneAppletContext.java,
	classpath/tools/gnu/classpath/tools/appletviewer/AppletSecurityManager.java,
	classpath/tools/gnu/classpath/tools/appletviewer/PluginAppletContext.java,
	classpath/tools/gnu/classpath/tools/appletviewer/AppletWarning.java,
	classpath/tools/gnu/classpath/tools/appletviewer/StandaloneAppletViewer.java,
	classpath/tools/gnu/classpath/tools/appletviewer/AppletTag.java,
	classpath/tools/gnu/classpath/tools/appletviewer/ConsoleDialog.java,
	classpath/tools/gnu/classpath/tools/appletviewer/Main.java,
	classpath/tools/gnu/classpath/tools/appletviewer/StandaloneAppletWindow.java,
	classpath/tools/gnu/classpath/tools/appletviewer/PluginAppletViewer.java,
	classpath/tools/gnu/classpath/tools/appletviewer/TagParser.java,
	classpath/tools/gnu/classpath/tools/appletviewer/PluginAppletWindow.java,
	classpath/tools/gnu/classpath/tools/appletviewer/CommonAppletStub.java,
	classpath/tools/gnu/classpath/tools/serialver/Messages.java,
	classpath/tools/gnu/classpath/tools/serialver/SerialVer.java,
	classpath/tools/gnu/classpath/tools/jar/Creator.java,
	classpath/tools/gnu/classpath/tools/jar/Entry.java,
	classpath/tools/gnu/classpath/tools/jar/Lister.java,
	classpath/tools/gnu/classpath/tools/jar/Main.java,
	classpath/tools/gnu/classpath/tools/jar/Updater.java,
	classpath/tools/gnu/classpath/tools/jar/Messages.java,
	classpath/tools/gnu/classpath/tools/jar/Extractor.java,
	classpath/tools/gnu/classpath/tools/jar/Action.java,
	classpath/tools/gnu/classpath/tools/jar/Indexer.java,
	classpath/tools/gnu/classpath/tools/jar/WorkSet.java,
	classpath/tools/gnu/classpath/tools/giop/GRMIC.txt,
	classpath/tools/gnu/classpath/tools/giop/grmic/GiopRmicCompiler.java,
	classpath/tools/gnu/classpath/tools/giop/GRMIC.java,
	classpath/tools/Makefile.am, classpath/tools/jarsigner.in,
	classpath/tools/keytool.in, classpath/tools/appletviewer.in,
	classpath/tools/.cvsignore, classpath/configure.ac,
	classpath/javax/swing/JTabbedPane.java,
	classpath/javax/swing/AbstractButton.java,
	classpath/javax/swing/JViewport.java,
	classpath/javax/swing/KeyboardManager.java,
	classpath/javax/swing/JMenuItem.java,
	classpath/javax/swing/JMenuBar.java,
	classpath/javax/swing/MenuSelectionManager.java,
	classpath/javax/swing/JOptionPane.java,
	classpath/javax/swing/JSpinner.java,
	classpath/javax/swing/JCheckBoxMenuItem.java,
	classpath/javax/swing/JEditorPane.java,
	classpath/javax/swing/JFormattedTextField.java,
	classpath/javax/swing/JTree.java,
	classpath/javax/swing/CellRendererPane.java,
	classpath/javax/swing/JScrollPane.java,
	classpath/javax/swing/tree/VariableHeightLayoutCache.java,
	classpath/javax/swing/tree/TreeNode.java,
	classpath/javax/swing/tree/FixedHeightLayoutCache.java,
	classpath/javax/swing/tree/DefaultTreeCellEditor.java,
	classpath/javax/swing/tree/TreePath.java,
	classpath/javax/swing/tree/RowMapper.java,
	classpath/javax/swing/tree/DefaultMutableTreeNode.java,
	classpath/javax/swing/tree/DefaultTreeModel.java,
	classpath/javax/swing/tree/AbstractLayoutCache.java,
	classpath/javax/swing/tree/TreeSelectionModel.java,
	classpath/javax/swing/tree/DefaultTreeSelectionModel.java,
	classpath/javax/swing/tree/DefaultTreeCellRenderer.java,
	classpath/javax/swing/tree/ExpandVetoException.java,
	classpath/javax/swing/JList.java,
	classpath/javax/swing/table/JTableHeader.java,
	classpath/javax/swing/table/AbstractTableModel.java,
	classpath/javax/swing/table/DefaultTableModel.java,
	classpath/javax/swing/table/TableCellEditor.java,
	classpath/javax/swing/table/TableCellRenderer.java,
	classpath/javax/swing/ProgressMonitor.java,
	classpath/javax/swing/JToolBar.java,
	classpath/javax/swing/TransferHandler.java,
	classpath/javax/swing/DefaultCellEditor.java,
	classpath/javax/swing/DefaultButtonModel.java,
	classpath/javax/swing/JLayeredPane.java,
	classpath/javax/swing/text/DefaultEditorKit.java,
	classpath/javax/swing/text/DefaultCaret.java,
	classpath/javax/swing/text/FieldView.java,
	classpath/javax/swing/text/JTextComponent.java,
	classpath/javax/swing/text/TextAction.java,
	classpath/javax/swing/text/StyleContext.java,
	classpath/javax/swing/text/html/HTMLDocument.java,
	classpath/javax/swing/text/html/MinimalHTMLWriter.java,
	classpath/javax/swing/text/html/ImageView.java,
	classpath/javax/swing/text/html/HTMLEditorKit.java,
	classpath/javax/swing/text/AbstractWriter.java,
	classpath/javax/swing/text/GapContent.java,
	classpath/javax/swing/text/Utilities.java,
	classpath/javax/swing/text/PlainView.java,
	classpath/javax/swing/UIManager.java,
	classpath/javax/swing/JSplitPane.java,
	classpath/javax/swing/JComponent.java,
	classpath/javax/swing/SwingUtilities.java,
	classpath/javax/swing/border/AbstractBorder.java,
	classpath/javax/swing/border/CompoundBorder.java,
	classpath/javax/swing/border/TitledBorder.java,
	classpath/javax/swing/border/MatteBorder.java,
	classpath/javax/swing/border/BevelBorder.java,
	classpath/javax/swing/RepaintManager.java,
	classpath/javax/swing/JTable.java,
	classpath/javax/swing/UIDefaults.java,
	classpath/javax/swing/DefaultDesktopManager.java,
	classpath/javax/swing/JMenu.java,
	classpath/javax/swing/JLabel.java,
	classpath/javax/swing/JSlider.java,
	classpath/javax/swing/plaf/basic/BasicToolBarUI.java,
	classpath/javax/swing/plaf/basic/BasicButtonUI.java,
	classpath/javax/swing/plaf/basic/BasicOptionPaneUI.java,
	classpath/javax/swing/plaf/basic/BasicTextAreaUI.java,
	classpath/javax/swing/plaf/basic/BasicToggleButtonUI.java,
	classpath/javax/swing/plaf/basic/BasicSpinnerUI.java,
	classpath/javax/swing/plaf/basic/BasicSliderUI.java,
	classpath/javax/swing/plaf/basic/BasicTabbedPaneUI.java,
	classpath/javax/swing/plaf/basic/BasicComboPopup.java,
	classpath/javax/swing/plaf/basic/BasicCheckBoxUI.java,
	classpath/javax/swing/plaf/basic/BasicInternalFrameUI.java,
	classpath/javax/swing/plaf/basic/BasicProgressBarUI.java,
	classpath/javax/swing/plaf/basic/BasicRadioButtonUI.java,
	classpath/javax/swing/plaf/basic/BasicPanelUI.java,
	classpath/javax/swing/plaf/basic/BasicSplitPaneUI.java,
	classpath/javax/swing/plaf/basic/BasicTreeUI.java,
	classpath/javax/swing/plaf/basic/BasicTableHeaderUI.java,
	classpath/javax/swing/plaf/basic/BasicFileChooserUI.java,
	classpath/javax/swing/plaf/basic/BasicScrollPaneUI.java,
	classpath/javax/swing/plaf/basic/BasicComboBoxUI.java,
	classpath/javax/swing/plaf/basic/BasicListUI.java,
	classpath/javax/swing/plaf/basic/BasicIconFactory.java,
	classpath/javax/swing/plaf/basic/BasicTextUI.java,
	classpath/javax/swing/plaf/basic/BasicLookAndFeel.java,
	classpath/javax/swing/plaf/basic/BasicDirectoryModel.java,
	classpath/javax/swing/plaf/basic/BasicRootPaneUI.java,
	classpath/javax/swing/plaf/basic/BasicTableUI.java,
	classpath/javax/swing/plaf/basic/SharedUIDefaults.java,
	classpath/javax/swing/plaf/multi/MultiComboBoxUI.java,
	classpath/javax/swing/plaf/multi/MultiListUI.java,
	classpath/javax/swing/plaf/multi/MultiSplitPaneUI.java,
	classpath/javax/swing/plaf/multi/MultiFileChooserUI.java,
	classpath/javax/swing/plaf/multi/MultiOptionPaneUI.java,
	classpath/javax/swing/plaf/multi/MultiTabbedPaneUI.java,
	classpath/javax/swing/plaf/multi/MultiLookAndFeel.java,
	classpath/javax/swing/plaf/metal/MetalSliderUI.java,
	classpath/javax/swing/plaf/metal/MetalIconFactory.java,
	classpath/javax/swing/plaf/metal/MetalComboBoxIcon.java,
	classpath/javax/swing/plaf/metal/MetalTabbedPaneUI.java,
	classpath/javax/swing/plaf/metal/MetalLookAndFeel.java,
	classpath/javax/swing/plaf/metal/MetalCheckBoxUI.java,
	classpath/javax/swing/plaf/metal/MetalSeparatorUI.java,
	classpath/javax/swing/plaf/metal/MetalBorders.java,
	classpath/javax/swing/plaf/metal/MetalSplitPaneDivider.java,
	classpath/javax/swing/plaf/metal/MetalScrollBarUI.java,
	classpath/javax/swing/plaf/metal/MetalRootPaneUI.java,
	classpath/javax/swing/plaf/metal/MetalInternalFrameUI.java,
	classpath/javax/swing/plaf/metal/MetalRadioButtonUI.java,
	classpath/javax/swing/plaf/metal/MetalToolTipUI.java,
	classpath/javax/swing/plaf/metal/MetalInternalFrameTitlePane.java,
	classpath/javax/swing/plaf/metal/MetalFileChooserUI.java,
	classpath/javax/swing/plaf/metal/MetalUtils.java,
	classpath/javax/swing/plaf/metal/MetalComboBoxButton.java,
	classpath/javax/swing/plaf/metal/MetalPopupMenuSeparatorUI.java,
	classpath/javax/swing/plaf/metal/MetalButtonUI.java,
	classpath/javax/swing/JPopupMenu.java,
	classpath/javax/swing/JProgressBar.java,
	classpath/javax/swing/WindowConstants.java,
	classpath/javax/swing/JFrame.java,
	classpath/javax/swing/JFileChooser.java,
	classpath/javax/swing/JComboBox.java,
	classpath/javax/swing/event/EventListenerList.java,
	classpath/javax/swing/ListSelectionModel.java,
	classpath/javax/swing/JScrollBar.java,
	classpath/java/text/SimpleDateFormat.java,
	classpath/java/text/NumberFormat.java,
	classpath/java/text/class-dependencies.conf,
	classpath/java/awt/image/ColorModel.java,
	classpath/java/awt/image/BufferedImage.java,
	classpath/java/awt/Window.java,
	classpath/java/awt/ContainerOrderFocusTraversalPolicy.java,
	classpath/java/awt/LightweightDispatcher.java,
	classpath/java/awt/EventDispatchThread.java,
	classpath/java/awt/BasicStroke.java,
	classpath/java/awt/ColorPaintContext.java,
	classpath/java/awt/Container.java,
	classpath/java/awt/TexturePaint.java,
	classpath/java/awt/Component.java, classpath/java/awt/Font.java,
	classpath/java/awt/GraphicsConfiguration.java,
	classpath/java/awt/DefaultKeyboardFocusManager.java,
	classpath/java/awt/print/PrinterJob.java,
	classpath/java/awt/im/InputContext.java,
	classpath/java/awt/dnd/DragGestureRecognizer.java,
	classpath/java/awt/Toolkit.java,
	classpath/java/awt/font/GraphicAttribute.java,
	classpath/java/awt/font/ImageGraphicAttribute.java,
	classpath/java/awt/font/GlyphVector.java,
	classpath/java/awt/font/GlyphMetrics.java,
	classpath/java/awt/font/ShapeGraphicAttribute.java,
	classpath/java/awt/Graphics2D.java,
	classpath/include/gnu_java_awt_peer_gtk_GdkGraphicsEnvironment.h,
	classpath/include/gnu_java_awt_peer_gtk_ComponentGraphics.h,
	classpath/include/gnu_java_awt_peer_gtk_CairoGraphics2D.h,
	classpath/include/gnu_java_awt_peer_gtk_FreetypeGlyphVector.h,
	classpath/include/gnu_java_awt_peer_gtk_GtkCanvasPeer.h,
	classpath/include/config.h.in,
	classpath/include/gnu_java_awt_peer_gtk_GdkTextLayout.h,
	classpath/include/gnu_java_awt_peer_gtk_GtkComponentPeer.h,
	classpath/include/gnu_java_awt_peer_gtk_GdkFontPeer.h,
	classpath/include/gnu_java_awt_peer_gtk_ComponentGraphicsCopy.h,
	classpath/include/gnu_java_awt_peer_gtk_GtkVolatileImage.h,
	classpath/include/gnu_java_awt_peer_gtk_GtkImage.h,
	classpath/include/gnu_java_awt_peer_gtk_CairoSurface.h,
	classpath/include/gnu_java_awt_peer_gtk_GdkScreenGraphicsDevice.h:
	Merge from GNU Classpath HEAD.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@114510 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 53 insertions, 11 deletions

diff --git a/libjava/classpath/javax/swing/plaf/basic/BasicPanelUI.java b/libjava/classpath/javax/swing/plaf/basic/BasicPanelUI.java
index 4f535f653cc..458f10204f0 100644
--- a/libjava/classpath/javax/swing/plaf/basic/BasicPanelUI.java
+++ b/libjava/classpath/javax/swing/plaf/basic/BasicPanelUI.java
@@ -1,5 +1,5 @@
 /* BasicPanelUI.java
-   Copyright (C) 2002, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2006, Free Software Foundation, Inc.
 
 This file is part of GNU Classpath.
 
@@ -44,33 +44,68 @@ import javax.swing.LookAndFeel;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.PanelUI;
 
+/**
+ * A UI delegate for the {@link JPanel} component.
+ */
 public class BasicPanelUI extends PanelUI
 {
-  public static ComponentUI createUI(JComponent x) 
+  /**
+   * A UI delegate that can be shared by all panels (because the delegate is
+   * stateless).
+   */
+  static BasicPanelUI sharedUI;
+  
+  /**
+   * Returns a UI delegate for the specified component.
+   * 
+   * @param panel  the panel.
+   */
+  public static ComponentUI createUI(JComponent panel) 
   {
-    return new BasicPanelUI();
+    if (sharedUI == null)
+      sharedUI = new BasicPanelUI();
+    return sharedUI;
   }
 
+  /**
+   * Installs this UI delegate in the specified component.
+   * 
+   * @param c  the component (should be a {@link JPanel}, <code>null</code> not
+   *     permitted).
+   */
   public void installUI(JComponent c)
   {
     super.installUI(c);
     if (c instanceof JPanel)
       {
-	JPanel p = (JPanel) c;
-	installDefaults(p);
+        JPanel p = (JPanel) c;
+        installDefaults(p);
       }
   }
 
+  /**
+   * Installs the defaults for this UI delegate in the specified panel.
+   * 
+   * @param p  the panel (<code>null</code> not permitted).
+   */
   protected void installDefaults(JPanel p)
   {
     LookAndFeel.installColorsAndFont(p, "Panel.background", "Panel.foreground",
                                      "Panel.font");
+    
+    // A test against the reference implementation shows that this method will
+    // install a border if one is defined in the UIDefaults table (even though
+    // the BasicLookAndFeel doesn't actually define a "Panel.border").  This
+    // test was written after discovering that a null argument to 
+    // uninstallDefaults throws a NullPointerException in 
+    // LookAndFeel.uninstallBorder()...
+    LookAndFeel.installBorder(p, "Panel.border");
   }
 
   /**
-   * Uninstalls this UI from the JPanel.
+   * Uninstalls this UI delegate from the specified component.
    *
-   * @param c the JPanel from which to uninstall this UI
+   * @param c the component (<code>null</code> not permitted).
    */
   public void uninstallUI(JComponent c)
   {
@@ -78,13 +113,20 @@ public class BasicPanelUI extends PanelUI
   }
 
   /**
-   * Uninstalls the UI defaults that have been install through
-   * {@link #installDefaults}.
+   * Uninstalls the UI defaults for the specified panel.
    *
-   * @param p the panel from which to uninstall the UI defaults
+   * @param p  the panel (<code>null</code> not permitted).
    */
   protected void uninstallDefaults(JPanel p)
   {
-    // Nothing to do here.
+    // Tests on the reference implementation showed this method:
+    // (1) doesn't actually remove the installed colors and font installed
+    //     by installDefaults(), it isn't necessary;
+    // (2) throws a NullPointerException in LookAndFeel.uninstallBorder() if
+    //     p is null.  Strangely, no border is installed by the 
+    //     BasicLookAndFeel - perhaps this is needed by another LAF?
+    
+    LookAndFeel.uninstallBorder(p);
   }
+  
 }