--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/javax/swing/JWindow/ShapedAndTranslucentWindows/PerPixelTranslucentSwing.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2010, 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.
+ */
+
+import javax.swing.*;
+import java.awt.*;
+
+/*
+ * @test
+ * @key headful
+ * @summary Check if a per-pixel translucent window shows only the area having
+ *          opaque pixels
+ * Test Description: Check if PERPIXEL_TRANSLUCENT Translucency type is supported
+ *      on the current platform. Proceed if it is supported. Create a swing window
+ *      with some swing components in it and a transparent background (alpha 0.0).
+ *      Bring this window on top of a known background. Do this test for JFrame,
+ *      JWindow and JDialog
+ * Expected Result: Only the components present in the window must be shown. Other
+ *      areas of the window must be transparent so that the background shows
+ * @author mrkam
+ * @library ../../../../lib/testlibrary
+ * @build Common ExtendedRobot
+ * @run main PerPixelTranslucentSwing
+ */
+
+public class PerPixelTranslucentSwing extends Common {
+
+    JButton north;
+
+    public static void main(String[] ignored) throws Exception {
+        FG_COLOR = new Color(200, 0, 0, 0);
+        if (checkTranslucencyMode(GraphicsDevice.WindowTranslucency.PERPIXEL_TRANSLUCENT))
+            for (Class<Window> windowClass: WINDOWS_TO_TEST)
+                new PerPixelTranslucentSwing(windowClass).doTest();
+    }
+
+    public PerPixelTranslucentSwing(Class windowClass) throws Exception {
+        super(windowClass);
+    }
+
+    @Override
+    public void createSwingComponents() {
+        Container contentPane = RootPaneContainer.class.cast(window).getContentPane();
+        BorderLayout bl = new BorderLayout(10, 5);
+        contentPane.setLayout(bl);
+
+        north = new JButton("North");
+        contentPane.add(north, BorderLayout.NORTH);
+
+        JList center = new JList(new String[] {"Center"});
+        contentPane.add(center, BorderLayout.CENTER);
+
+        JTextField south = new JTextField("South");
+        contentPane.add(south, BorderLayout.SOUTH);
+
+        window.pack();
+        window.setVisible(true);
+
+        north.requestFocus();
+    }
+
+    @Override
+    public void doTest() throws Exception {
+        robot.waitForIdle(delay);
+
+        // Check for background translucency
+        Rectangle bounds = north.getBounds();
+        Point loc = north.getLocationOnScreen();
+
+        Color color = robot.getPixelColor(loc.x + bounds.width / 2, loc.y + bounds.height + 3);
+        System.out.println(color);
+        if (FG_COLOR.getRGB() == color.getRGB())
+            throw new RuntimeException("Background is not translucent (" + color + ")");
+
+        EventQueue.invokeAndWait(this::dispose);
+    }
+}