1 /* 2 * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 @test 26 @bug 4980592 27 @summary switching user in XP causes an NPE in sun.awt.windows.WWindowPeer.displayChanged 28 @requires (os.family == "windows") 29 @modules java.desktop/java.awt.peer 30 @modules java.desktop/sun.awt.windows 31 @modules java.desktop/sun.awt 32 @author son@sparc.spb.su: area=embedded 33 @run main DisplayChangedTest 34 */ 35 36 /** 37 * DisplayChangedTest.java 38 * 39 * summary: switching user in XP causes an NPE in sun.awt.windows.WWindowPeer.displayChanged 40 */ 41 42 import java.awt.Frame; 43 import java.awt.Dialog; 44 import java.awt.TextArea; 45 import java.awt.peer.ComponentPeer; 46 import java.awt.peer.FramePeer; 47 import java.lang.reflect.Constructor; 48 import java.lang.reflect.Method; 49 import java.lang.reflect.Field; 50 51 import sun.awt.AWTAccessor; 52 53 public class DisplayChangedTest { 54 55 /** 56 * Test fails if it throws any exception. 57 * @throws Exception 58 */ 59 private void init() throws Exception { 60 61 if (!System.getProperty("os.name").startsWith("Windows")) { 62 System.out.println("This is Windows only test."); 63 return; 64 } 65 66 Frame frame = new Frame("AWT Frame"); 67 frame.pack(); 68 69 FramePeer frame_peer = AWTAccessor.getComponentAccessor().getPeer(frame); 70 Class comp_peer_class = 71 Class.forName("sun.awt.windows.WComponentPeer"); 72 Field hwnd_field = comp_peer_class.getDeclaredField("hwnd"); 73 hwnd_field.setAccessible(true); 74 long hwnd = hwnd_field.getLong(frame_peer); 75 76 Class clazz = Class.forName("sun.awt.windows.WEmbeddedFrame"); 77 Constructor constructor = clazz.getConstructor (new Class [] {long.class}); 78 Frame embedded_frame = 79 (Frame) constructor.newInstance (new Object[] {new Long(hwnd)});; 80 frame.setVisible(true); 81 82 ComponentPeer peer = AWTAccessor.getComponentAccessor().getPeer(embedded_frame); 83 Class peerClass = peer.getClass(); 84 85 Method displayChangedM = 86 peerClass.getMethod("displayChanged", new Class[0]); 87 displayChangedM.invoke(peer, null); 88 embedded_frame.dispose(); 89 frame.dispose(); 90 91 } 92 93 94 public static void main( String args[] ) throws Exception { 95 new DisplayChangedTest().init(); 96 } 97 98 }