1 /*
2 * Copyright (c) 2009, 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
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7 * published by the Free Software Foundation.
8 *
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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).
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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
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22 */
23
24 /* @test %W% %E%
25 @bug 6798062
26 @summary Memory Leak on using getFiles of FileSystemView
27 @author Pavel Porvatov
28 @modules java.desktop/sun.awt
29 java.desktop/sun.awt.shell
30 @run applet/manual=done bug6798062.html
31 */
32
33 import sun.awt.OSInfo;
34 import sun.awt.shell.ShellFolder;
35
36 import javax.swing.*;
37 import java.awt.event.ActionEvent;
38 import java.awt.event.ActionListener;
39 import java.awt.*;
40 import java.io.File;
41 import java.io.FileNotFoundException;
42
43 public class bug6798062 extends JApplet {
44
45 private final JSlider slider = new JSlider(0, 100);
46
47 private final JTextField tfLink = new JTextField();
48
49 private final JButton btnStart = new JButton("Start");
50
51 private final JButton btnStop = new JButton("Stop");
52
53 private final JButton btnGC = new JButton("Run System.gc()");
54
55 private ShellFolder folder;
56
57 private Thread thread;
58
59 public static void main(String[] args) {
60 JFrame frame = new JFrame("bug6798062");
61
62 frame.setSize(400, 300);
63 frame.setLocationRelativeTo(null);
64 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
65 frame.add(new bug6798062().initialize());
66
67 frame.setVisible(true);
68 }
69
70 public void init() {
71 add(initialize());
72 }
73
74 private JComponent initialize() {
75 if (OSInfo.getOSType() != OSInfo.OSType.WINDOWS) {
76 return new JLabel("The test is suitable only for Windows");
77 }
78
79 String tempDir = System.getProperty("java.io.tmpdir");
80
81 if (tempDir.length() == 0) { // 'java.io.tmpdir' isn't guaranteed to be defined
82 tempDir = System.getProperty("user.home");
83 }
84
85 System.out.println("Temp directory: " + tempDir);
86
87 try {
88 folder = ShellFolder.getShellFolder(new File(tempDir));
89 } catch (FileNotFoundException e) {
90 fail("Directory " + tempDir + " not found");
91 }
92
93 slider.setMajorTickSpacing(10);
94 slider.setPaintTicks(true);
95 slider.setPaintLabels(true);
96 slider.setSnapToTicks(true);
97 slider.setValue(10);
98
99 btnStart.addActionListener(new ActionListener() {
100 public void actionPerformed(ActionEvent e) {
101 setEnabledState(false);
102
103 thread = new MyThread(slider.getValue(), tfLink.getText());
104 thread.start();
105 }
106 });
107
108 btnStop.setEnabled(false);
109
110 btnStop.addActionListener(new ActionListener() {
111 public void actionPerformed(ActionEvent e) {
112 thread.interrupt();
113 thread = null;
114
115 setEnabledState(true);
116 }
117 });
118
119 btnGC.addActionListener(new ActionListener() {
120 public void actionPerformed(ActionEvent e) {
121 System.gc();
122 }
123 });
124
125 setEnabledState(true);
126
127 JPanel pnButtons = new JPanel();
128
129 pnButtons.setLayout(new BoxLayout(pnButtons, BoxLayout.X_AXIS));
130
131 pnButtons.add(btnStart);
132 pnButtons.add(btnStop);
133 pnButtons.add(btnGC);
134
135 tfLink.setMaximumSize(new Dimension(300, 20));
136
137 JPanel pnContent = new JPanel();
138
139 pnContent.setLayout(new BoxLayout(pnContent, BoxLayout.Y_AXIS));
140 pnContent.add(new JLabel("Delay between listFiles() invocation (ms):"));
141 pnContent.add(slider);
142 pnContent.add(new JLabel("Provide link here:"));
143 pnContent.add(tfLink);
144 pnContent.add(pnButtons);
145
146 return pnContent;
147 }
148
149 private void setEnabledState(boolean enabled) {
150 slider.setEnabled(enabled);
151 btnStart.setEnabled(enabled);
152 btnStop.setEnabled(!enabled);
153 }
154
155 private static void fail(String msg) {
156 throw new RuntimeException(msg);
157 }
158
159 private class MyThread extends Thread {
160 private final int delay;
161
162 private final ShellFolder link;
163
164 private MyThread(int delay, String link) {
165 this.delay = delay;
166
167 ShellFolder linkFolder;
168
169 try {
170 linkFolder = ShellFolder.getShellFolder(new File(link));
171 } catch (FileNotFoundException e) {
172 e.printStackTrace();
173
174 linkFolder = null;
175 }
176
177 this.link = linkFolder;
178 }
179
180 public void run() {
181 while (!isInterrupted()) {
182 folder.listFiles();
183 if (link != null) {
184 try {
185 link.getLinkLocation();
186 } catch (FileNotFoundException e) {
187 e.printStackTrace();
188 }
189 }
190
191 if (delay > 0) {
192 try {
193 Thread.sleep(delay);
194 } catch (InterruptedException e1) {
195 // The thread was interrupted
196 return;
197 }
198 }
199 }
200 }
201 }
202 }