1 /* 2 * Copyright (c) 2009, 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 /* @test %W% %E% 25 @bug 6798062 26 @summary Memory Leak on using getFiles of FileSystemView 27 @author Pavel Porvatov 28 @run applet/manual=done bug6798062.html 29 */ 30 31 import sun.awt.OSInfo; 32 import sun.awt.shell.ShellFolder; 33 34 import javax.swing.*; 35 import java.awt.event.ActionEvent; 36 import java.awt.event.ActionListener; 37 import java.awt.*; 38 import java.io.File; 39 import java.io.FileNotFoundException; 40 41 public class bug6798062 extends JApplet { 42 43 private final JSlider slider = new JSlider(0, 100); 44 45 private final JTextField tfLink = new JTextField(); 46 47 private final JButton btnStart = new JButton("Start"); 48 49 private final JButton btnStop = new JButton("Stop"); 50 51 private final JButton btnGC = new JButton("Run System.gc()"); 52 53 private ShellFolder folder; 54 55 private Thread thread; 56 57 public static void main(String[] args) { 58 JFrame frame = new JFrame("bug6798062"); 59 60 frame.setSize(400, 300); 61 frame.setLocationRelativeTo(null); 62 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 63 frame.add(new bug6798062().initialize()); 64 65 frame.setVisible(true); 66 } 67 68 public void init() { 69 add(initialize()); 70 } 71 72 private JComponent initialize() { 73 if (OSInfo.getOSType() != OSInfo.OSType.WINDOWS) { 74 return new JLabel("The test is suitable only for Windows"); 75 } 76 77 String tempDir = System.getProperty("java.io.tmpdir"); 78 79 if (tempDir.length() == 0) { // 'java.io.tmpdir' isn't guaranteed to be defined 80 tempDir = System.getProperty("user.home"); 81 } 82 83 System.out.println("Temp directory: " + tempDir); 84 85 try { 86 folder = ShellFolder.getShellFolder(new File(tempDir)); 87 } catch (FileNotFoundException e) { 88 fail("Directory " + tempDir + " not found"); 89 } 90 91 slider.setMajorTickSpacing(10); 92 slider.setPaintTicks(true); 93 slider.setPaintLabels(true); 94 slider.setSnapToTicks(true); 95 slider.setValue(10); 96 97 btnStart.addActionListener(new ActionListener() { 98 public void actionPerformed(ActionEvent e) { 99 setEnabledState(false); 100 101 thread = new MyThread(slider.getValue(), tfLink.getText()); 102 thread.start(); 103 } 104 }); 105 106 btnStop.setEnabled(false); 107 108 btnStop.addActionListener(new ActionListener() { 109 public void actionPerformed(ActionEvent e) { 110 thread.interrupt(); 111 thread = null; 112 113 setEnabledState(true); 114 } 115 }); 116 117 btnGC.addActionListener(new ActionListener() { 118 public void actionPerformed(ActionEvent e) { 119 System.gc(); 120 } 121 }); 122 123 setEnabledState(true); 124 125 JPanel pnButtons = new JPanel(); 126 127 pnButtons.setLayout(new BoxLayout(pnButtons, BoxLayout.X_AXIS)); 128 129 pnButtons.add(btnStart); 130 pnButtons.add(btnStop); 131 pnButtons.add(btnGC); 132 133 tfLink.setMaximumSize(new Dimension(300, 20)); 134 135 JPanel pnContent = new JPanel(); 136 137 pnContent.setLayout(new BoxLayout(pnContent, BoxLayout.Y_AXIS)); 138 pnContent.add(new JLabel("Delay between listFiles() invocation (ms):")); 139 pnContent.add(slider); 140 pnContent.add(new JLabel("Provide link here:")); 141 pnContent.add(tfLink); 142 pnContent.add(pnButtons); 143 144 return pnContent; 145 } 146 147 private void setEnabledState(boolean enabled) { 148 slider.setEnabled(enabled); 149 btnStart.setEnabled(enabled); 150 btnStop.setEnabled(!enabled); 151 } 152 153 private static void fail(String msg) { 154 throw new RuntimeException(msg); 155 } 156 157 private class MyThread extends Thread { 158 private final int delay; 159 160 private final ShellFolder link; 161 162 private MyThread(int delay, String link) { 163 this.delay = delay; 164 165 ShellFolder linkFolder; 166 167 try { 168 linkFolder = ShellFolder.getShellFolder(new File(link)); 169 } catch (FileNotFoundException e) { 170 e.printStackTrace(); 171 172 linkFolder = null; 173 } 174 175 this.link = linkFolder; 176 } 177 178 public void run() { 179 while (!isInterrupted()) { 180 folder.listFiles(); 181 if (link != null) { 182 try { 183 link.getLinkLocation(); 184 } catch (FileNotFoundException e) { 185 e.printStackTrace(); 186 } 187 } 188 189 if (delay > 0) { 190 try { 191 Thread.sleep(delay); 192 } catch (InterruptedException e1) { 193 // The thread was interrupted 194 return; 195 } 196 } 197 } 198 } 199 } 200 }