8046559: NPE when changing Windows theme

Reviewed-by: pchelko, anthony

src/share/classes/com/sun/java/swing/plaf/windows/AnimationController.java

 /*
- * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2006, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -130,11 +130,14 @@ class AnimationController implements ActionListener, PropertyChangeListener {
                     //one second seems plausible value
                     duration = 1000;
                 } else {
-                     duration = XPStyle.getXP().getThemeTransitionDuration(
-                           c, part,
-                           normalizeState(oldState),
-                           normalizeState(newState),
-                           Prop.TRANSITIONDURATIONS);
+                    XPStyle xp = XPStyle.getXP();
+                    duration = (xp != null)
+                               ? xp.getThemeTransitionDuration(
+                                       c, part,
+                                       normalizeState(oldState),
+                                       normalizeState(newState),
+                                       Prop.TRANSITIONDURATIONS)
+                               : 1000;
                 }
                 controller.startAnimation(c, part, oldState, newState, duration);
             }

src/share/classes/com/sun/java/swing/plaf/windows/WindowsComboBoxUI.java

 /*
- * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -37,6 +37,7 @@ import java.awt.*;
 import static com.sun.java.swing.plaf.windows.TMSchema.Part;
 import static com.sun.java.swing.plaf.windows.TMSchema.State;
 import static com.sun.java.swing.plaf.windows.XPStyle.Skin;
+
 import sun.swing.DefaultLookup;
 import sun.swing.StringUIClientPropertyKey;
 
@@ -231,6 +232,9 @@ public class WindowsComboBoxUI extends BasicComboBoxUI {
 
     private void paintXPComboBoxBackground(Graphics g, JComponent c) {
         XPStyle xp = XPStyle.getXP();
+        if (xp == null) {
+            return;
+        }
         State state = getXPComboBoxState(c);
         Skin skin = null;
         if (! comboBox.isEditable()
@@ -400,17 +404,18 @@ public class WindowsComboBoxUI extends BasicComboBoxUI {
      * @return a button which represents the popup control
      */
     protected JButton createArrowButton() {
-        if (XPStyle.getXP() != null) {
-            return new XPComboBoxButton();
+        XPStyle xp = XPStyle.getXP();
+        if (xp != null) {
+            return new XPComboBoxButton(xp);
         } else {
             return super.createArrowButton();
         }
     }
 
     private class XPComboBoxButton extends XPStyle.GlyphButton {
-        public XPComboBoxButton() {
+        public XPComboBoxButton(XPStyle xp) {
             super(null,
-                  (! XPStyle.getXP().isSkinDefined(comboBox, Part.CP_DROPDOWNBUTTONRIGHT))
+                  (! xp.isSkinDefined(comboBox, Part.CP_DROPDOWNBUTTONRIGHT))
                    ? Part.CP_DROPDOWNBUTTON
                    : (comboBox.getComponentOrientation() == ComponentOrientation.RIGHT_TO_LEFT)
                      ? Part.CP_DROPDOWNBUTTONLEFT
@@ -423,10 +428,11 @@ public class WindowsComboBoxUI extends BasicComboBoxUI {
         protected State getState() {
             State rv;
             rv = super.getState();
+            XPStyle xp = XPStyle.getXP();
             if (rv != State.DISABLED
                 && comboBox != null && ! comboBox.isEditable()
-                && XPStyle.getXP().isSkinDefined(comboBox,
-                                                 Part.CP_DROPDOWNBUTTONRIGHT)) {
+                && xp != null && xp.isSkinDefined(comboBox,
+                                                  Part.CP_DROPDOWNBUTTONRIGHT)) {
                 /*
                  * for non editable ComboBoxes Vista seems to have the
                  * same glyph for all non DISABLED states

src/share/classes/com/sun/java/swing/plaf/windows/WindowsGraphicsUtils.java

 /*
- * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -125,6 +125,9 @@ public class WindowsGraphicsUtils {
     static void paintXPText(AbstractButton b, Part part, State state,
             Graphics g, int x, int y, String text, int mnemIndex) {
         XPStyle xp = XPStyle.getXP();
+        if (xp == null) {
+            return;
+        }
         Color textColor = b.getForeground();
 
         if (textColor instanceof UIResource) {

src/share/classes/com/sun/java/swing/plaf/windows/WindowsIconFactory.java

@@ -613,8 +613,8 @@ public class WindowsIconFactory implements Serializable
 
     private static class MenuArrowIcon implements Icon, UIResource, Serializable {
         public void paintIcon(Component c, Graphics g, int x, int y) {
-            if (WindowsMenuItemUI.isVistaPainting()) {
-                XPStyle xp = XPStyle.getXP();
+            XPStyle xp = XPStyle.getXP();
+            if (WindowsMenuItemUI.isVistaPainting(xp)) {
                 State state = State.NORMAL;
                 if (c instanceof JMenuItem) {
                     state = ((JMenuItem) c).getModel().isEnabled()
@@ -647,16 +647,18 @@ public class WindowsIconFactory implements Serializable
             }
         }
         public int getIconWidth() {
-            if (WindowsMenuItemUI.isVistaPainting()) {
-                Skin skin = XPStyle.getXP().getSkin(null, Part.MP_POPUPSUBMENU);
+            XPStyle xp = XPStyle.getXP();
+            if (WindowsMenuItemUI.isVistaPainting(xp)) {
+                Skin skin = xp.getSkin(null, Part.MP_POPUPSUBMENU);
                 return skin.getWidth();
             } else {
                 return 4;
             }
         }
         public int getIconHeight() {
-            if (WindowsMenuItemUI.isVistaPainting()) {
-                Skin skin = XPStyle.getXP().getSkin(null, Part.MP_POPUPSUBMENU);
+            XPStyle xp = XPStyle.getXP();
+            if (WindowsMenuItemUI.isVistaPainting(xp)) {
+                Skin skin = xp.getSkin(null, Part.MP_POPUPSUBMENU);
                 return skin.getHeight();
             } else {
                 return 8;
@@ -682,7 +684,8 @@ public class WindowsIconFactory implements Serializable
         }
 
         static int getIconWidth() {
-            return XPStyle.getXP().getSkin(null, Part.MP_POPUPCHECK).getWidth()
+            XPStyle xp = XPStyle.getXP();
+            return ((xp != null) ? xp.getSkin(null, Part.MP_POPUPCHECK).getWidth() : 16)
                 + 2 * OFFSET;
         }
 
@@ -745,12 +748,17 @@ public class WindowsIconFactory implements Serializable
                 Icon icon = getIcon();
                 int height = 0;
                 if (icon != null) {
-                    height = icon.getIconHeight() + 2 * OFFSET;
+                    height = icon.getIconHeight();
                 } else {
-                    Skin skin =
-                        XPStyle.getXP().getSkin(null, Part.MP_POPUPCHECK);
-                    height = skin.getHeight() + 2 * OFFSET;
+                    XPStyle xp = XPStyle.getXP();
+                    if (xp != null) {
+                        Skin skin = xp.getSkin(null, Part.MP_POPUPCHECK);
+                        height = skin.getHeight();
+                    } else {
+                        height = 16;
+                    }
                 }
+                height +=  2 * OFFSET;
                 return height;
             }
 
@@ -798,14 +806,16 @@ public class WindowsIconFactory implements Serializable
                                   ? State.BULLETDISABLED
                                   : State.CHECKMARKDISABLED;
                         }
-                        Skin skin;
                         XPStyle xp = XPStyle.getXP();
-                        skin =  xp.getSkin(c, backgroundPart);
-                        skin.paintSkin(g, x, y,
-                            getIconWidth(), getIconHeight(), backgroundState);
-                        if (icon == null) {
-                            skin = xp.getSkin(c, part);
-                            skin.paintSkin(g, x + OFFSET, y + OFFSET, state);
+                        if (xp != null) {
+                            Skin skin;
+                            skin =  xp.getSkin(c, backgroundPart);
+                            skin.paintSkin(g, x, y,
+                                getIconWidth(), getIconHeight(), backgroundState);
+                            if (icon == null) {
+                                skin = xp.getSkin(c, part);
+                                skin.paintSkin(g, x + OFFSET, y + OFFSET, state);
+                            }
                         }
                     }
                 }

src/share/classes/com/sun/java/swing/plaf/windows/WindowsInternalFrameTitlePane.java

 /*
- * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -85,14 +85,15 @@ public class WindowsInternalFrameTitlePane extends BasicInternalFrameTitlePane {
             }
         } else {
             buttonWidth += 2;
-            selectedTitleGradientColor =
-                    UIManager.getColor("InternalFrame.activeTitleGradient");
-            notSelectedTitleGradientColor =
-                    UIManager.getColor("InternalFrame.inactiveTitleGradient");
             Color activeBorderColor =
                     UIManager.getColor("InternalFrame.activeBorderColor");
             setBorder(BorderFactory.createLineBorder(activeBorderColor, 1));
         }
+        // JDK-8039383: initialize these colors because getXP() may return null when theme is changed
+        selectedTitleGradientColor =
+                UIManager.getColor("InternalFrame.activeTitleGradient");
+        notSelectedTitleGradientColor =
+                UIManager.getColor("InternalFrame.inactiveTitleGradient");
     }
 
     protected void uninstallListeners() {

src/share/classes/com/sun/java/swing/plaf/windows/WindowsLookAndFeel.java

@@ -2399,8 +2399,9 @@ public class WindowsLookAndFeel extends BasicLookAndFeel
         }
 
         public Object getXPValue(UIDefaults table) {
-            Border xpBorder = XPStyle.getXP().getBorder(null, (Part)xpValue);
-            if (extraMargin != null) {
+            XPStyle xp = XPStyle.getXP();
+            Border xpBorder = xp != null ? xp.getBorder(null, (Part)xpValue) : null;
+            if (xpBorder != null && extraMargin != null) {
                 return new BorderUIResource.
                         CompoundBorderUIResource(xpBorder, extraMargin);
             } else {
@@ -2416,7 +2417,8 @@ public class WindowsLookAndFeel extends BasicLookAndFeel
 
         public Object getXPValue(UIDefaults table) {
             XPColorValueKey key = (XPColorValueKey)xpValue;
-            return XPStyle.getXP().getColor(key.skin, key.prop, null);
+            XPStyle xp = XPStyle.getXP();
+            return xp != null ? xp.getColor(key.skin, key.prop, null) : null;
         }
 
         private static class XPColorValueKey {

src/share/classes/com/sun/java/swing/plaf/windows/WindowsMenuBarUI.java

@@ -155,8 +155,8 @@ public class WindowsMenuBarUI extends BasicMenuBarUI
 
     @Override
     public void paint(Graphics g, JComponent c) {
-        if (WindowsMenuItemUI.isVistaPainting()) {
-            XPStyle xp = XPStyle.getXP();
+        XPStyle xp = XPStyle.getXP();
+        if (WindowsMenuItemUI.isVistaPainting(xp)) {
             Skin skin;
             skin = xp.getSkin(c, Part.MP_BARBACKGROUND);
             int width = c.getWidth();

src/share/classes/com/sun/java/swing/plaf/windows/WindowsMenuItemUI.java

 /*
- * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -108,8 +108,9 @@ public class WindowsMenuItemUI extends BasicMenuItemUI {
 
     static void paintBackground(WindowsMenuItemUIAccessor menuItemUI,
             Graphics g, JMenuItem menuItem, Color bgColor) {
-        assert isVistaPainting();
-        if (isVistaPainting()) {
+        XPStyle xp = XPStyle.getXP();
+        assert isVistaPainting(xp);
+        if (isVistaPainting(xp)) {
             int menuWidth = menuItem.getWidth();
             int menuHeight = menuItem.getHeight();
             if (menuItem.isOpaque()) {
@@ -118,7 +119,6 @@ public class WindowsMenuItemUI extends BasicMenuItemUI {
                 g.fillRect(0,0, menuWidth, menuHeight);
                 g.setColor(oldColor);
             }
-            XPStyle xp = XPStyle.getXP();
             Part part = menuItemUI.getPart(menuItem);
             Skin skin = xp.getSkin(menuItem, part);
             skin.paintSkin(g, 0 , 0,
@@ -170,8 +170,11 @@ public class WindowsMenuItemUI extends BasicMenuItemUI {
      * is it possible that in some theme some Vista parts are not defined while
      * others are?
      */
-    static boolean isVistaPainting() {
-        XPStyle xp = XPStyle.getXP();
+    static boolean isVistaPainting(final XPStyle xp) {
         return xp != null && xp.isSkinDefined(null, Part.MP_POPUPITEM);
     }
+
+    static boolean isVistaPainting() {
+        return isVistaPainting(XPStyle.getXP());
+    }
 }

src/share/classes/com/sun/java/swing/plaf/windows/WindowsPopupMenuSeparatorUI.java

 /*
- * Copyright (c) 2004, 2006, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2004, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -50,7 +50,8 @@ public class WindowsPopupMenuSeparatorUI extends BasicPopupMenuSeparatorUI {
 
     public void paint(Graphics g, JComponent c) {
         Dimension s = c.getSize();
-        if (WindowsMenuItemUI.isVistaPainting()) {
+        XPStyle xp = XPStyle.getXP();
+        if (WindowsMenuItemUI.isVistaPainting(xp)) {
             int x = 1;
             Component parent = c.getParent();
             if (parent instanceof JComponent) {
@@ -67,7 +68,7 @@ public class WindowsPopupMenuSeparatorUI extends BasicPopupMenuSeparatorUI {
                     x += WindowsPopupMenuUI.getGutterWidth();
                 }
             }
-            Skin skin = XPStyle.getXP().getSkin(c, Part.MP_POPUPSEPARATOR);
+            Skin skin = xp.getSkin(c, Part.MP_POPUPSEPARATOR);
             int skinHeight = skin.getHeight();
             int y = (s.height - skinHeight) / 2;
             skin.paintSkin(g, x, y, s.width - x - 1, skinHeight, State.NORMAL);

src/share/classes/com/sun/java/swing/plaf/windows/WindowsPopupMenuUI.java

 /*
- * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -194,8 +194,8 @@ public class WindowsPopupMenuUI extends BasicPopupMenuUI {
 
     @Override
     public void paint(Graphics g, JComponent c) {
-        if (WindowsMenuItemUI.isVistaPainting()) {
-            XPStyle xp = XPStyle.getXP();
+        XPStyle xp = XPStyle.getXP();
+        if (WindowsMenuItemUI.isVistaPainting(xp)) {
             Skin skin = xp.getSkin(c, Part.MP_POPUPBACKGROUND);
             skin.paintSkin(g, 0, 0, c.getWidth(),c.getHeight(), State.NORMAL);
             int textOffset = getTextOffset(c);

src/share/classes/com/sun/java/swing/plaf/windows/WindowsProgressBarUI.java

 /*
- * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -322,8 +322,9 @@ public class WindowsProgressBarUI extends BasicProgressBarUI
     private Rectangle getFullChunkBounds(Rectangle box) {
         boolean vertical = (progressBar.getOrientation() == JProgressBar.VERTICAL);
         XPStyle xp = XPStyle.getXP();
-        int gap = xp.getInt(progressBar, Part.PP_PROGRESS, null,
-                            Prop.PROGRESSSPACESIZE, 0);
+        int gap = (xp != null) ? xp.getInt(progressBar, Part.PP_PROGRESS,
+                                           null, Prop.PROGRESSSPACESIZE, 0)
+                               : 0;
 
         if (!vertical) {
             int chunksize = box.width+gap;
@@ -338,6 +339,9 @@ public class WindowsProgressBarUI extends BasicProgressBarUI
                                           boolean vertical,
                                           int bgwidth, int bgheight) {
         XPStyle xp = XPStyle.getXP();
+        if (xp == null) {
+            return;
+        }
 
         // create a new graphics to keep drawing surface state
         Graphics2D gfx = (Graphics2D)g.create();
@@ -396,6 +400,9 @@ public class WindowsProgressBarUI extends BasicProgressBarUI
     private void paintXPBackground(Graphics g, boolean vertical,
                                    int barRectWidth, int barRectHeight) {
         XPStyle xp = XPStyle.getXP();
+        if (xp == null) {
+            return;
+        }
         Part part = vertical ? Part.PP_BARVERT : Part.PP_BAR;
         Skin skin = xp.getSkin(progressBar, part);
 

src/share/classes/com/sun/java/swing/plaf/windows/WindowsSliderUI.java

 /*
- * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -215,7 +215,6 @@ public class WindowsSliderUI extends BasicSliderUI
     }
 
     private Part getXPThumbPart() {
-        XPStyle xp = XPStyle.getXP();
         Part part;
         boolean vertical = (slider.getOrientation() == JSlider.VERTICAL);
         boolean leftToRight = slider.getComponentOrientation().isLeftToRight();

src/share/classes/com/sun/java/swing/plaf/windows/WindowsSpinnerUI.java

 /*
- * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -63,6 +63,9 @@ public class WindowsSpinnerUI extends BasicSpinnerUI {
 
     private void paintXPBackground(Graphics g, JComponent c) {
         XPStyle xp = XPStyle.getXP();
+        if (xp == null) {
+            return;
+        }
         Skin skin = xp.getSkin(c, Part.EP_EDIT);
         State state = getXPState(c);
         skin.paintSkin(g, 0, 0, c.getWidth(), c.getHeight(), state);

src/share/classes/com/sun/java/swing/plaf/windows/WindowsTableHeaderUI.java

@@ -90,9 +90,10 @@ public class WindowsTableHeaderUI extends BasicTableHeaderUI {
             this.column = column;
             this.hasRollover = (column == getRolloverColumn());
             if (skin == null) {
-                skin = XPStyle.getXP().getSkin(header, Part.HP_HEADERITEM);
+                XPStyle xp = XPStyle.getXP();
+                skin = (xp != null) ? xp.getSkin(header, Part.HP_HEADERITEM) : null;
             }
-            Insets margins = skin.getContentMargin();
+            Insets margins = (skin != null) ? skin.getContentMargin() : null;
             Border border = null;
             int contentTop = 0;
             int contentLeft = 0;

src/share/classes/com/sun/java/swing/plaf/windows/XPStyle.java

@@ -115,7 +115,7 @@ class XPStyle {
                 }
             }
         }
-        return xp;
+        return ThemeReader.isXPStyleEnabled() ? xp : null;
     }
 
     static boolean isVista() {
@@ -180,9 +180,10 @@ class XPStyle {
      * should probably be cached there instead of here.
      */
     Dimension getDimension(Component c, Part part, State state, Prop prop) {
-        return ThemeReader.getPosition(part.getControlName(c), part.getValue(),
-                                       State.getValue(part, state),
-                                       prop.getValue());
+        Dimension d = ThemeReader.getPosition(part.getControlName(c), part.getValue(),
+                                              State.getValue(part, state),
+                                              prop.getValue());
+        return (d != null) ? d : new Dimension();
     }
 
     /** Get a named <code>Point</code> (e.g. a location or an offset) value
@@ -199,11 +200,7 @@ class XPStyle {
         Dimension d = ThemeReader.getPosition(part.getControlName(c), part.getValue(),
                                               State.getValue(part, state),
                                               prop.getValue());
-        if (d != null) {
-            return new Point(d.width, d.height);
-        } else {
-            return null;
-        }
+        return (d != null) ? new Point(d.width, d.height) : new Point();
     }
 
     /** Get a named <code>Insets</code> value from the current style
@@ -217,9 +214,10 @@ class XPStyle {
      * The return value is already cached in those places.
      */
     Insets getMargin(Component c, Part part, State state, Prop prop) {
-        return ThemeReader.getThemeMargins(part.getControlName(c), part.getValue(),
-                                           State.getValue(part, state),
-                                           prop.getValue());
+        Insets insets = ThemeReader.getThemeMargins(part.getControlName(c), part.getValue(),
+                                                    State.getValue(part, state),
+                                                    prop.getValue());
+        return (insets != null) ? insets : new Insets(0, 0, 0, 0);
     }
 
 
@@ -505,16 +503,17 @@ class XPStyle {
             int boundingWidth = 100;
             int boundingHeight = 100;
 
-            return ThemeReader.getThemeBackgroundContentMargins(
+            Insets insets = ThemeReader.getThemeBackgroundContentMargins(
                 part.getControlName(null), part.getValue(),
                 0, boundingWidth, boundingHeight);
+            return (insets != null) ? insets : new Insets(0, 0, 0, 0);
         }
 
         private int getWidth(State state) {
             if (size == null) {
                 size = getPartSize(part, state);
             }
-            return size.width;
+            return (size != null) ? size.width : 0;
         }
 
         int getWidth() {
@@ -525,7 +524,7 @@ class XPStyle {
             if (size == null) {
                 size = getPartSize(part, state);
             }
-            return size.height;
+            return (size != null) ? size.height : 0;
         }
 
         int getHeight() {
@@ -582,6 +581,9 @@ class XPStyle {
          * @param state which state to paint
          */
         void paintSkin(Graphics g, int dx, int dy, int dw, int dh, State state) {
+            if (XPStyle.getXP() == null) {
+                return;
+            }
             if (ThemeReader.isGetThemeTransitionDurationDefined()
                   && component instanceof JComponent
                   && SwingUtilities.getAncestorOfClass(CellRendererPane.class,
@@ -607,6 +609,9 @@ class XPStyle {
          * @param state which state to paint
          */
         void paintSkinRaw(Graphics g, int dx, int dy, int dw, int dh, State state) {
+            if (XPStyle.getXP() == null) {
+                return;
+            }
             skinPainter.paint(null, g, dx, dy, dw, dh, this, state);
         }
 
@@ -625,6 +630,9 @@ class XPStyle {
          */
         void paintSkin(Graphics g, int dx, int dy, int dw, int dh, State state,
                 boolean borderFill) {
+            if (XPStyle.getXP() == null) {
+                return;
+            }
             if(borderFill && "borderfill".equals(getTypeEnumName(component, part,
                     state, Prop.BGTYPE))) {
                 return;
@@ -679,7 +687,7 @@ class XPStyle {
 
         public GlyphButton(Component parent, Part part) {
             XPStyle xp = getXP();
-            skin = xp.getSkin(parent, part);
+            skin = xp != null ? xp.getSkin(parent, part) : null;
             setBorder(null);
             setContentAreaFilled(false);
             setMinimumSize(new Dimension(5, 5));
@@ -704,13 +712,16 @@ class XPStyle {
         }
 
         public void paintComponent(Graphics g) {
+            if (XPStyle.getXP() == null || skin == null) {
+                return;
+            }
             Dimension d = getSize();
             skin.paintSkin(g, 0, 0, d.width, d.height, getState());
         }
 
         public void setPart(Component parent, Part part) {
             XPStyle xp = getXP();
-            skin = xp.getSkin(parent, part);
+            skin = xp != null ? xp.getSkin(parent, part) : null;
             revalidate();
             repaint();
         }

src/solaris/classes/sun/awt/windows/ThemeReader.java

@@ -45,6 +45,10 @@ public final class ThemeReader {
         return false;
     }
 
+    public static boolean isXPStyleEnabled() {
+        return false;
+    }
+
     public static void paintBackground(int[] buffer, String widget,
            int part, int state, int x, int y, int w, int h, int stride) {
     }

src/windows/classes/sun/awt/windows/ThemeReader.java

@@ -60,22 +60,22 @@ public final class ThemeReader {
         new ReentrantReadWriteLock();
     private static final Lock readLock = readWriteLock.readLock();
     private static final Lock writeLock = readWriteLock.writeLock();
+    private static volatile boolean valid = false;
+
+    static volatile boolean xpStyleEnabled;
 
     static void flush() {
-        writeLock.lock();
-        try {
-            // Close old themes.
-            for (Long value : widgetToTheme.values()) {
-                closeTheme(value.longValue());
-            }
-            widgetToTheme.clear();
-        } finally {
-            writeLock.unlock();
-        }
+        // Could be called on Toolkit thread, so do not try to acquire locks
+        // to avoid deadlock with theme initialization
+        valid = false;
     }
 
     public static native boolean isThemed();
 
+    public static boolean isXPStyleEnabled() {
+        return xpStyleEnabled;
+    }
+
     // this should be called only with writeLock held
     private static Long getThemeImpl(String widget) {
         Long theme = widgetToTheme.get(widget);
@@ -98,6 +98,24 @@ public final class ThemeReader {
     // returns theme value
     // this method should be invoked with readLock locked
     private static Long getTheme(String widget) {
+        if (!valid) {
+            readLock.unlock();
+            writeLock.lock();
+            try {
+                if (!valid) {
+                    // Close old themes.
+                    for (Long value : widgetToTheme.values()) {
+                        closeTheme(value);
+                    }
+                    widgetToTheme.clear();
+                    valid = true;
+                }
+            } finally {
+                readLock.lock();
+                writeLock.unlock();
+            }
+        }
+
         // mostly copied from the javadoc for ReentrantReadWriteLock
         Long theme = widgetToTheme.get(widget);
         if (theme == null) {

src/windows/classes/sun/awt/windows/WToolkit.java

@@ -36,6 +36,7 @@ import java.awt.TrayIcon;
 import java.beans.PropertyChangeListener;
 import java.security.AccessController;
 import java.security.PrivilegedAction;
+import sun.awt.AppContext;
 import sun.awt.AWTAutoShutdown;
 import sun.awt.LightweightFrame;
 import sun.awt.SunToolkit;
@@ -72,6 +73,9 @@ public final class WToolkit extends SunToolkit implements Runnable {
 
     private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.windows.WToolkit");
 
+    // Desktop property which specifies whether XP visual styles are in effect
+    public static final String XPSTYLE_THEME_ACTIVE = "win.xpstyle.themeActive";
+
     static GraphicsConfiguration config;
 
     // System clipboard.
@@ -894,7 +898,7 @@ public final class WToolkit extends SunToolkit implements Runnable {
     private synchronized void lazilyInitWProps() {
         if (wprops == null) {
             wprops = new WDesktopProperties(this);
-            updateProperties();
+            updateProperties(wprops.getProperties());
         }
     }
 
@@ -929,21 +933,36 @@ public final class WToolkit extends SunToolkit implements Runnable {
      * Windows doesn't always send WM_SETTINGCHANGE when it should.
      */
     private void windowsSettingChange() {
-        EventQueue.invokeLater(new Runnable() {
-            @Override
-            public void run() {
-                updateProperties();
-            }
-        });
+        // JDK-8039383: Have to update the value of XPSTYLE_THEME_ACTIVE property
+        // as soon as possible to prevent NPE and other errors because theme data
+        // has become unavailable.
+        final Map<String, Object> props = getWProps();
+        if (props == null) {
+            // props has not been initialized, so we have nothing to update
+            return;
+        }
+
+        updateXPStyleEnabled(props.get(XPSTYLE_THEME_ACTIVE));
+
+        if (AppContext.getAppContext() == null) {
+            // We cannot post the update to any EventQueue. Listeners will
+            // be called on EDTs by DesktopPropertyChangeSupport
+            updateProperties(props);
+        } else {
+            // Cannot update on Toolkit thread.
+            // DesktopPropertyChangeSupport will call listeners on Toolkit
+            // thread if it has AppContext (standalone mode)
+            EventQueue.invokeLater(() -> updateProperties(props));
+        }
     }
 
-    private synchronized void updateProperties() {
-        if (null == wprops) {
-            // wprops has not been initialized, so we have nothing to update
+    private synchronized void updateProperties(final Map<String, Object> props) {
+        if (null == props) {
             return;
         }
 
-        Map<String, Object> props = wprops.getProperties();
+        updateXPStyleEnabled(props.get(XPSTYLE_THEME_ACTIVE));
+
         for (String propName : props.keySet()) {
             Object val = props.get(propName);
             if (log.isLoggable(PlatformLogger.Level.FINER)) {
@@ -953,6 +972,14 @@ public final class WToolkit extends SunToolkit implements Runnable {
         }
     }
 
+    private synchronized Map<String, Object> getWProps() {
+        return (wprops != null) ? wprops.getProperties() : null;
+    }
+
+    private void updateXPStyleEnabled(final Object dskProp) {
+        ThemeReader.xpStyleEnabled = Boolean.TRUE.equals(dskProp);
+    }
+
     @Override
     public synchronized void addPropertyChangeListener(String name, PropertyChangeListener pcl) {
         if (name == null) {

test/javax/swing/JFileChooser/8046391/bug8046391.java

+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8046391
+ * @summary JFileChooser hangs if displayed in Windows L&F
+ * @author Alexey Ivanov
+ * @run main/othervm/timeout=10 bug8046391
+*/
+
+import com.sun.java.swing.plaf.windows.WindowsLookAndFeel;
+import sun.awt.OSInfo;
+import sun.awt.OSInfo.OSType;
+
+import javax.swing.JFileChooser;
+import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
+import javax.swing.UnsupportedLookAndFeelException;
+
+public class bug8046391  {
+
+    public static void main(String[] args) throws Exception {
+        OSType type = OSInfo.getOSType();
+        if (type != OSType.WINDOWS) {
+            System.out.println("This test is for Windows only... skipping!");
+            return;
+        }
+
+        SwingUtilities.invokeAndWait(() -> {
+            try {
+                UIManager.setLookAndFeel(new WindowsLookAndFeel());
+            } catch (UnsupportedLookAndFeelException e) {
+                e.printStackTrace();
+            }
+            System.out.println("Creating JFileChooser...");
+            JFileChooser fileChooser = new JFileChooser();
+            System.out.println("Test passed: chooser = " + fileChooser);
+        });
+        // Test fails if creating JFileChooser hangs
+    }
+
+}