1 /*
   2  * Copyright (c) 2016, 2017, 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 /**
  25  * @test
  26  * @key headful
  27  * @bug 8022810
  28  * @summary Device.getDisplayMode() doesn't report refresh rate on Linux in case
  29  *          of dual screen
  30  * @run main CurrentDisplayModeTest
  31  */
  32 
  33 import java.awt.*;
  34 import java.util.Arrays;
  35 import java.util.HashSet;
  36 import java.util.Set;
  37 
  38 public class CurrentDisplayModeTest {
  39     public static void main(String[] args) {
  40         GraphicsDevice[] screenDevices = GraphicsEnvironment.
  41                                getLocalGraphicsEnvironment().getScreenDevices();
  42         for (GraphicsDevice screenDevice : screenDevices) {
  43             DisplayMode currentMode = screenDevice.getDisplayMode();
  44             System.out.println("current mode " + currentMode);
  45             Set<DisplayMode> set = new HashSet<>(
  46                                  Arrays.asList(screenDevice.getDisplayModes()));
  47             if (!set.contains(currentMode)) {
  48                 throw new RuntimeException("Mode " + currentMode +
  49                         " is not found in the modes list " + set);
  50             }
  51         }
  52     }
  53 }