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 * Copyright (c) 2014, 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.

 *

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import java.awt.Window;

/**

 * @test

 * @bug 8064468

 * @author Alexander Scherbatiy

 * @summary ownedWindowList access requires synchronization in

 *     Window.setAlwaysOnTop() method

 * @run main SyncAlwaysOnTopFieldTest

 */

public class SyncAlwaysOnTopFieldTest {

    private static final int WINDOWS_COUNT = 200;

    private static final int STEPS_COUNT = 20;

    public static void main(String[] args) throws Exception {

        final Window rootWindow = createWindow(null);

        new Thread(() -> {

            for (int i = 0; i < WINDOWS_COUNT; i++) {

                createWindow(rootWindow);

            }

        }).start();

        boolean alwaysOnTop = true;

        for (int i = 0; i < STEPS_COUNT; i++) {

            Thread.sleep(10);

            rootWindow.setAlwaysOnTop(alwaysOnTop);

            alwaysOnTop = !alwaysOnTop;

        }

    }

    private static Window createWindow(Window parent) {

        Window window = new Window(parent);

        window.setSize(200, 200);

        window.setVisible(true);

        return window;

    }