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 /** 35 * @test 36 * @key headful 37 * @bug 8009919 38 * @author Sergey Bylokhov 39 * @library ../../../../lib/testlibrary/ 40 * @build ExtendedRobot 41 * @run main JButtonPaintNPE 42 */ 43 public final class JButtonPaintNPE { 44 45 private static JFrame frame; 46 47 public static void main(final String[] args) 48 throws InvocationTargetException, InterruptedException { 49 SwingUtilities.invokeAndWait(() -> { 50 frame = new JFrame(); 51 frame.add(new JButton() { 52 @Override 53 protected void paintComponent(final Graphics g) { 54 Graphics gg = new BufferedImage(getWidth(), getHeight(), 55 BufferedImage.TYPE_INT_ARGB).createGraphics(); 56 super.paintComponent(gg); 57 gg.dispose(); 58 } 59 }); 60 frame.setSize(300, 300); 61 frame.setLocationRelativeTo(null); 62 frame.setVisible(true); 63 }); 64 sleep(); 65 SwingUtilities.invokeAndWait(() -> { 66 if (frame != null) { 67 frame.dispose(); 68 } 69 }); 70 } 71 72 private static void sleep() { 73 try { 74 ExtendedRobot robot = new ExtendedRobot(); 75 robot.waitForIdle(1000); 76 }catch(Exception ex) { 77 ex.printStackTrace(); 78 throw new Error("Unexpected Failure"); 79 } 80 } 81 }