--- a/jdk/src/java.desktop/windows/native/libawt/windows/awt_Window.cpp	Tue Feb 02 12:12:52 2016 -0800
+++ b/jdk/src/java.desktop/windows/native/libawt/windows/awt_Window.cpp	Thu Feb 04 11:16:23 2016 +0530
@@ -382,6 +382,9 @@
     if (wp->flags & SWP_HIDEWINDOW) {
         EnableTranslucency(FALSE);
     }
+    if (wp->flags & SWP_SHOWWINDOW) {
+        EnableTranslucency(TRUE);
+    }
 
     return mrDoDefault;
 }

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/javax/swing/JDialog/Transparency/TransparencyTest.java	Thu Feb 04 11:16:23 2016 +0530
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2016, 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 8062946
+ @summary Verify Transparency upon iconify/deiconify sequence
+ @run main TransparencyTest
+ */
+import java.awt.Color;
+import java.awt.Point;
+import java.awt.Robot;
+import javax.swing.JDialog;
+import javax.swing.JFrame;
+import javax.swing.SwingUtilities;
+
+public class TransparencyTest {
+
+    private static JFrame frame;
+    private static JDialog dialog;
+    private static JDialog backgroundDialog;
+    private static final int WIDTH = 250;
+    private static final int HEIGHT = 250;
+    private static final float OPACITY = 0.60f;
+    private static Point dlgPos;
+
+    public static void createAndShowGUI() {
+        frame = new JFrame("JFrame");
+        frame.setSize(WIDTH, HEIGHT);
+        frame.setLocation(100, 300);
+
+        dialog = new JDialog(frame, false);
+        dialog.setSize(250, 250);
+        dialog.setUndecorated(true);
+        dialog.setLocation(400, 300);
+        dlgPos = dialog.getLocation();
+        backgroundDialog = new JDialog(frame, false);
+        backgroundDialog.setSize(250, 250);
+        backgroundDialog.getContentPane().setBackground(Color.red);
+        backgroundDialog.setLocation(dlgPos.x, dlgPos.y);
+
+        frame.setVisible(true);
+        backgroundDialog.setVisible(true);
+        dialog.setVisible(true);
+    }
+
+    public static void main(String[] args) throws Exception {
+
+        Robot robot = new Robot();
+        // create a GUI
+        SwingUtilities.invokeAndWait(new Runnable() {
+
+            @Override
+            public void run() {
+                createAndShowGUI();
+            }
+        });
+        robot.waitForIdle();
+        Color opaque = robot.getPixelColor(dlgPos.x + 100, dlgPos.y + 100);
+
+        // set Dialog Opacity
+        SwingUtilities.invokeAndWait(new Runnable() {
+
+            @Override
+            public void run() {
+                dialog.setOpacity(OPACITY);
+            }
+        });
+        robot.waitForIdle();
+
+        // iconify frame
+        SwingUtilities.invokeAndWait(new Runnable() {
+
+            @Override
+            public void run() {
+                frame.setExtendedState(JFrame.ICONIFIED);
+            }
+        });
+        robot.waitForIdle();
+
+        // deiconify frame
+        SwingUtilities.invokeAndWait(new Runnable() {
+
+            @Override
+            public void run() {
+                frame.setExtendedState(JFrame.NORMAL);
+            }
+        });
+        robot.waitForIdle();
+
+        Color transparent = robot.getPixelColor(dlgPos.x + 100, dlgPos.y + 100);
+        if (transparent.equals(opaque)) {
+            frame.dispose();
+            throw new RuntimeException("JDialog transparency lost "
+                    + "upon iconify/deiconify sequence");
+        }
+        frame.dispose();
+    }
+}