1 /*
   2  * Copyright (c) 2013, 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 import java.awt.Graphics;
  26 import java.awt.Toolkit;
  27 import java.awt.image.BufferedImage;
  28 import java.lang.reflect.InvocationTargetException;
  29 
  30 import javax.swing.JButton;
  31 import javax.swing.JFrame;
  32 import javax.swing.SwingUtilities;
  33 
  34 import sun.awt.SunToolkit;
  35 
  36 /**
  37  * @test
  38  * @bug 8009919
  39  * @author Sergey Bylokhov
  40  */
  41 public final class JButtonPaintNPE {
  42 
  43     private static JFrame frame;
  44 
  45     public static void main(final String[] args)
  46             throws InvocationTargetException, InterruptedException {
  47         SwingUtilities.invokeAndWait(() -> {
  48             frame = new JFrame();
  49             frame.add(new JButton() {
  50                 @Override
  51                 protected void paintComponent(final Graphics g) {
  52                     Graphics gg = new BufferedImage(getWidth(), getHeight(),
  53                                   BufferedImage.TYPE_INT_ARGB).createGraphics();
  54                     super.paintComponent(gg);
  55                     gg.dispose();
  56                 }
  57             });
  58             frame.setSize(300, 300);
  59             frame.setLocationRelativeTo(null);
  60             frame.setVisible(true);
  61         });
  62         sleep();
  63         SwingUtilities.invokeAndWait(() -> {
  64             if (frame != null) {
  65                 frame.dispose();
  66             }
  67         });
  68     }
  69 
  70     private static void sleep() {
  71         try {
  72             ((SunToolkit) Toolkit.getDefaultToolkit()).realSync();
  73             Thread.sleep(1000);
  74         } catch (final InterruptedException ignored) {
  75         }
  76     }
  77 }