--- /dev/null	2015-08-04 03:20:55.977768079 -0700
+++ new/test/java/awt/EmbeddedFrame/DisplayChangedTest/DisplayChangedTest.java	2015-08-25 02:56:29.268143964 -0700
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2013, 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.
+ */
+
+/*
+ @test
+ @bug 4980592
+ @summary   switching user in XP causes an NPE in 
+            sun.awt.windows.WWindowPeer.displayChanged
+ @requires (os.family == "windows")
+ @modules java.desktop/java.awt.peer
+ @modules java.desktop/sun.awt.windows
+ @modules java.desktop/sun.awt
+ @author son@sparc.spb.su: area=embedded
+ @run main DisplayChangedTest
+ */
+/**
+ * DisplayChangedTest.java
+ *
+ * summary: switching user in XP causes an NPE in
+ * sun.awt.windows.WWindowPeer.displayChanged
+ */
+import java.awt.Frame;
+import java.awt.Dialog;
+import java.awt.TextArea;
+import java.awt.peer.ComponentPeer;
+import java.awt.peer.FramePeer;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Method;
+import java.lang.reflect.Field;
+
+import sun.awt.AWTAccessor;
+
+public class DisplayChangedTest {
+
+    /**
+     * Test fails if it throws any exception.
+     *
+     * @throws Exception
+     */
+    private void init() throws Exception {
+
+        if (!System.getProperty("os.name").startsWith("Windows")) {
+            System.out.println("This is Windows only test.");
+            return;
+        }
+
+        Frame frame = new Frame("AWT Frame");
+        frame.pack();
+
+        FramePeer frame_peer = AWTAccessor.getComponentAccessor()
+                .getPeer(frame);
+        Class comp_peer_class = Class.forName("sun.awt.windows.WComponentPeer");
+        Field hwnd_field = comp_peer_class.getDeclaredField("hwnd");
+        hwnd_field.setAccessible(true);
+        long hwnd = hwnd_field.getLong(frame_peer);
+        
+        Class clazz = Class.forName("sun.awt.windows.WEmbeddedFrame");
+        Constructor constructor = clazz
+                .getConstructor(new Class[]{long.class});
+        Frame embedded_frame = (Frame) constructor
+                .newInstance(new Object[]{new Long(hwnd)});
+        frame.setVisible(true);
+        
+        ComponentPeer peer = AWTAccessor.getComponentAccessor().getPeer(
+                embedded_frame);
+        Class peerClass = peer.getClass();
+        Method displayChangedM = peerClass.getMethod("displayChanged",
+                new Class[0]);
+        displayChangedM.invoke(peer, null);
+        embedded_frame.dispose();
+        frame.dispose();
+
+    }
+
+    public static void main(String args[]) throws Exception {
+        new DisplayChangedTest().init();
+    }
+
+}