--- /dev/null	2017-09-21 15:24:15.000000000 +0530
+++ new/src/java.desktop/share/classes/sun/awt/OverrideNativeWindowHandle.java	2017-09-21 15:24:15.000000000 +0530
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 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
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+
+package sun.awt;
+
+/**
+ * Used for replacing window owner with another non-Swing window.
+ * It is useful in case of JavaFX-Swing interop:
+ * it helps to keep Swing dialogs above its owner(JavaFX stage).
+ */
+
+public interface OverrideNativeWindowHandle {
+
+    /**
+     * Replaces owner window with a window with provided handle.
+     * @param handle native window handle
+     */
+    void overrideWindowHandle(final long handle);
+}