--- old/src/java.desktop/windows/classes/sun/awt/windows/WToolkit.java	2018-03-20 10:23:46.000000000 -0700
+++ new/src/java.desktop/windows/classes/sun/awt/windows/WToolkit.java	2018-03-20 10:23:46.000000000 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1996, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1996, 2018, 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
@@ -47,6 +47,7 @@
 import sun.awt.AWTAutoShutdown;
 import sun.awt.AWTPermissions;
 import sun.awt.AppContext;
+import sun.awt.DisplayChangedListener;
 import sun.awt.LightweightFrame;
 import sun.awt.SunToolkit;
 import sun.awt.util.ThreadGroupUtils;
@@ -802,9 +803,10 @@
     public native int getMaximumCursorColors();
 
     static void paletteChanged() {
-        ((Win32GraphicsEnvironment)GraphicsEnvironment
-        .getLocalGraphicsEnvironment())
-        .paletteChanged();
+        Object lge = GraphicsEnvironment.getLocalGraphicsEnvironment();
+        if (lge instanceof DisplayChangedListener) {
+            ((DisplayChangedListener) lge).paletteChanged();
+        }
     }
 
     /*
@@ -816,9 +818,10 @@
         EventQueue.invokeLater(new Runnable() {
             @Override
             public void run() {
-                ((Win32GraphicsEnvironment)GraphicsEnvironment
-                .getLocalGraphicsEnvironment())
-                .displayChanged();
+                Object lge = GraphicsEnvironment.getLocalGraphicsEnvironment();
+                if (lge instanceof DisplayChangedListener) {
+                    ((DisplayChangedListener) lge).displayChanged();
+                }
             }
         });
     }
--- old/test/jdk/ProblemList.txt	2018-03-20 10:23:48.000000000 -0700
+++ new/test/jdk/ProblemList.txt	2018-03-20 10:23:48.000000000 -0700
@@ -171,7 +171,6 @@
 java/awt/EventDispatchThread/HandleExceptionOnEDT/HandleExceptionOnEDT.java 6990210 generic-all
 java/awt/EventDispatchThread/LoopRobustness/LoopRobustness.html 4931413 windows-all
 java/awt/FullScreen/FullScreenInsets/FullScreenInsets.java 7019055 windows-all
-java/awt/FullScreen/UninitializedDisplayModeChangeTest/UninitializedDisplayModeChangeTest.java 8198335 windows-all
 java/awt/Focus/8013611/JDK8013611.java 8175366 windows-all,macosx-all
 java/awt/Focus/6378278/InputVerifierTest.java 8198616 macosx-all
 java/awt/Focus/6382144/EndlessLoopTest.java 8198617 macosx-all
--- old/test/jdk/java/awt/FullScreen/UninitializedDisplayModeChangeTest/UninitializedDisplayModeChangeTest.java	2018-03-20 10:23:50.000000000 -0700
+++ new/test/jdk/java/awt/FullScreen/UninitializedDisplayModeChangeTest/UninitializedDisplayModeChangeTest.java	2018-03-20 10:23:50.000000000 -0700
@@ -23,12 +23,13 @@
 
 /**
  * @test
- * @bug 6358034 6568560 8198613
+ * @bug 6358034 6568560 8198613 8198335
  * @key headful
  * @summary Tests that no exception is thrown when display mode is changed
  *          externally
  * @compile UninitializedDisplayModeChangeTest.java DisplayModeChanger.java
  * @run main/othervm UninitializedDisplayModeChangeTest
+ * @run main/othervm -Djava.awt.headless=true UninitializedDisplayModeChangeTest
  */
 
 import java.awt.EventQueue;