src/java.desktop/macosx/classes/sun/lwawt/LWLightweightFramePeer.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2017, 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.  Oracle designates this

@@ -32,14 +32,15 @@
 import java.awt.Window;
 import java.awt.dnd.DropTarget;
 import java.awt.event.FocusEvent;
 
 import sun.awt.LightweightFrame;
+import sun.awt.OverrideNativeWindowHandle;
 import sun.swing.JLightweightFrame;
 import sun.swing.SwingAccessor;
 
-public class LWLightweightFramePeer extends LWWindowPeer {
+public class LWLightweightFramePeer extends LWWindowPeer implements OverrideNativeWindowHandle {
 
     public LWLightweightFramePeer(LightweightFrame target,
                                   PlatformComponent platformComponent,
                                   PlatformWindow platformWindow)
     {

@@ -114,6 +115,17 @@
 
     @Override
     public void updateCursorImmediately() {
         SwingAccessor.getJLightweightFrameAccessor().updateCursor((JLightweightFrame)getLwTarget());
     }
+
+    private long overridenWindowHandle = 0L;
+
+    @Override
+    public void overrideWindowHandle(final long handle) {
+        this.overridenWindowHandle = handle;
+    }
+
+    public long getOverridenWindowHandle() {
+        return overridenWindowHandle;
+    }
 }