1 /*

     2  * Copyright (c) 2012, 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.image.ImageObserver;

    25 import java.awt.image.ImageProducer;

    26 import java.awt.image.ImageConsumer;

    27 import java.awt.Image;

    28 import java.awt.Container;

    29 

    30 /* @test 1.0 12/01/17

    31    @bug 7104151

    32    @summary Make sure that we don't leak image observers (or related objects)

    33    @run main/othervm AddNoLeak

    34    @author David Buck

    35 */

    36 

    37 public class AddNoLeak {

    38     public static void main(String[] args) {

    39         System.setProperty("java.awt.headless", "true");

    40         Container cont = new Container();

    41         Image img = cont.createImage(new DummyImageSource());

    42         for(int i=0;i < 15000;i++) {

    43             img.getWidth(new ImageObserver() {

    44                 public boolean imageUpdate(Image img, int infoflags, int x, int y, int width, int height) {return false;}

    45             });

    46             if (i % 100 == 0) {

    47                 System.gc();

    48             }

    49         }

    50     }

    51 

    52     private static class DummyImageSource implements ImageProducer {

    53         public void addConsumer(ImageConsumer ic){}

    54         public boolean isConsumer(ImageConsumer ic){return false;}

    55         public void removeConsumer(ImageConsumer ic){}

    56         public void startProduction(ImageConsumer ic){}

    57         public void requestTopDownLeftRightResend(ImageConsumer ic){}

    58     }

    59 }