1 /* 2 * Copyright (c) 2015, 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.BorderLayout; 25 import java.awt.Dimension; 26 import java.awt.EventQueue; 27 import java.awt.GraphicsEnvironment; 28 29 import javax.swing.JFrame; 30 import javax.swing.JLabel; 31 32 import sun.java2d.SunGraphicsEnvironment; 33 34 /** 35 * @test 36 * @bug 8041654 37 * @run main/othervm -Xmx80m DisplayListenerLeak 38 */ 39 public final class DisplayListenerLeak { 40 41 private static JFrame frame; 42 private volatile static boolean failed = false; 43 44 private static void createAndShowGUI() { 45 Thread.currentThread().setUncaughtExceptionHandler((t, e) -> { 46 e.printStackTrace(); 47 failed = true; 48 }); 49 frame = new JFrame(); 50 JLabel emptyLabel = new JLabel(""); 51 emptyLabel.setPreferredSize(new Dimension(600, 400)); 52 frame.getContentPane().add(emptyLabel, BorderLayout.CENTER); 53 frame.pack(); 54 frame.setVisible(true); 55 } 56 57 public static void main(final String[] args) throws Exception { 58 GraphicsEnvironment ge = 59 GraphicsEnvironment.getLocalGraphicsEnvironment(); 60 if (!(ge instanceof SunGraphicsEnvironment)) { 61 return; 62 } 63 EventQueue.invokeAndWait(() -> createAndShowGUI()); 64 SunGraphicsEnvironment sge = (SunGraphicsEnvironment) ge; 65 final long startTime = System.nanoTime(); 66 while (!failed) { 67 if (System.nanoTime() - startTime > 60_000_000_000L) { 68 break; 69 } 70 System.gc(); // clear all weak references 71 EventQueue.invokeAndWait(() -> { 72 frame.setSize(frame.getHeight(), frame.getWidth()); 73 frame.pack(); 74 }); 75 EventQueue.invokeAndWait(sge::displayChanged); 76 } 77 EventQueue.invokeAndWait(frame::dispose); 78 if (failed) { 79 throw new RuntimeException(); 80 } 81 } 82 }