1 /*

     2  * Copyright (c) 2018, 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 import java.awt.Button;

    25 import java.awt.Frame;

    26 import java.util.concurrent.TimeUnit;

    27 

    28 import sun.awt.SunToolkit;

    29 

    30 /**

    31  * @test

    32  * @key headful

    33  * @bug 8211435

    34  * @requires (os.family == "mac")

    35  * @modules java.desktop/sun.awt

    36  */

    37 public final class NullActiveWindowOnFocusLost {

    38 

    39     private static volatile long endtime;

    40     private static Throwable failed;

    41 

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

    43         // Will run the test no more than 30 seconds

    44         endtime = System.nanoTime() + TimeUnit.SECONDS.toNanos(30);

    45         Thread.setDefaultUncaughtExceptionHandler((t, e) -> failed = e);

    46 

    47         final Thread[] threads = new Thread[20];

    48         for (int i = 0; i < threads.length; i++) {

    49             threads[i] = testThread(i);

    50         }

    51         for (final Thread thread : threads) {

    52             thread.start();

    53         }

    54         for (final Thread thread : threads) {

    55             thread.join();

    56         }

    57         if (failed != null) {

    58             failed.printStackTrace();

    59             throw new RuntimeException(failed);

    60         }

    61     }

    62 

    63     private static Thread testThread(int index) {

    64         return new Thread(new ThreadGroup("TG " + index), () -> {

    65             SunToolkit.createNewAppContext();

    66             while (!isComplete()) {

    67                 final Frame frame = new Frame();

    68                 frame.setSize(300, 300);

    69                 frame.add(new Button("Button"));

    70                 frame.setLocationRelativeTo(null);

    71                 frame.setVisible(true);

    72                 try {

    73                     Thread.sleep(index); // increase probability of the failure

    74                 } catch (InterruptedException ignored) {

    75                 }

    76                 frame.dispose();

    77             }

    78         });

    79     }

    80 

    81     private static boolean isComplete() {

    82         return endtime - System.nanoTime() < 0 || failed != null;

    83     }

    84 }