--- a/jdk/src/java.desktop/share/classes/javax/swing/AbstractButton.java	Tue Jan 13 16:04:22 2015 +0300
+++ b/jdk/src/java.desktop/share/classes/javax/swing/AbstractButton.java	Tue Jan 13 16:06:28 2015 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, 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
@@ -2215,10 +2215,7 @@
      */
     public boolean imageUpdate(Image img, int infoflags,
                                int x, int y, int w, int h) {
-        Icon iconDisplayed = getIcon();
-        if (iconDisplayed == null) {
-            return false;
-        }
+        Icon iconDisplayed = null;
 
         if (!model.isEnabled()) {
             if (model.isSelected()) {
@@ -2238,7 +2235,12 @@
             iconDisplayed = getSelectedIcon();
         }
 
-        if (!SwingUtilities.doesIconReferenceImage(iconDisplayed, img)) {
+        if (iconDisplayed == null) {
+            iconDisplayed = getIcon();
+        }
+
+        if (iconDisplayed == null
+            || !SwingUtilities.doesIconReferenceImage(iconDisplayed, img)) {
             // We don't know about this image, disable the notification so
             // we don't keep repainting.
             return false;

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/javax/swing/AbstractButton/AnimatedIcon/AnimatedIcon.java	Tue Jan 13 16:06:28 2015 +0300
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+
+import java.awt.image.BufferedImage;
+import java.awt.image.ImageObserver;
+
+import javax.swing.ImageIcon;
+import javax.swing.JButton;
+import javax.swing.SwingUtilities;
+
+import static java.awt.image.BufferedImage.TYPE_INT_RGB;
+
+/**
+ * @test
+ * @bug 6573305
+ * @summary Animated icon should animate when the JButton is pressed.
+ * @author Sergey Bylokhov
+ */
+public final class AnimatedIcon {
+
+    public static void main(final String[] args) throws Exception {
+        SwingUtilities.invokeAndWait(() -> {
+            final BufferedImage bi = new BufferedImage(1, 1, TYPE_INT_RGB);
+            final ImageIcon icon = new ImageIcon(bi);
+            final JButton button = new JButton(icon);
+            // Default icon is set => imageUpdate should return true for it
+            isAnimated(bi, button);
+            button.getModel().setPressed(true);
+            button.getModel().setArmed(true);
+            isAnimated(bi, button);
+            button.getModel().setPressed(false);
+            button.getModel().setArmed(false);
+            button.getModel().setSelected(true);
+            isAnimated(bi, button);
+            button.getModel().setSelected(false);
+            button.getModel().setRollover(true);
+            button.setRolloverEnabled(true);
+            isAnimated(bi, button);
+            button.getModel().setSelected(true);
+            isAnimated(bi, button);
+            // Default icon is not set => imageUpdate should return true for
+            // other icons if any
+            button.setIcon(null);
+            button.setPressedIcon(icon);
+            button.getModel().setPressed(true);
+            button.getModel().setArmed(true);
+            isAnimated(bi, button);
+        });
+    }
+
+    private static void isAnimated(BufferedImage bi, JButton button) {
+        if (!button.imageUpdate(bi, ImageObserver.SOMEBITS, 0, 0, 1, 1)) {
+            throw new RuntimeException();
+        }
+    }
+}