1 /*

     2  * Copyright (c) 2010, 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   @bug 6783910

    27   @summary java.awt.Color.brighter()/darker() methods make color opaque

    28   @author Andrei Dmitriev: area=awt-color

    29   @run main OpacityChange

    30 */

    31 

    32 import java.awt.*;

    33 

    34 public class OpacityChange {

    35     private final static int INITIAL_ALPHA = 125;

    36 

    37     public static void main(String argv[]) {

    38         Color color = new Color(20, 20, 20, INITIAL_ALPHA);

    39         System.out.println("Initial alpha: " + color.getAlpha());

    40         Color colorBrighter = color.brighter();

    41         System.out.println("New alpha (after brighter): " + colorBrighter.getAlpha());

    42 

    43         Color colorDarker = color.darker();

    44         System.out.println("New alpha (after darker): " + colorDarker.getAlpha());

    45 

    46 

    47         if (INITIAL_ALPHA != colorBrighter.getAlpha()) {

    48             throw new RuntimeException("Brighter color alpha has changed from : " +INITIAL_ALPHA + " to " + colorBrighter.getAlpha());

    49         }

    50         if (INITIAL_ALPHA != colorDarker.getAlpha()) {

    51             throw new RuntimeException("Darker color alpha has changed from : " +INITIAL_ALPHA + " to " + colorDarker.getAlpha());

    52         }

    53     }

    54 }