1 /*
2  * Copyright (c) 2002, 2004, 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
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22  *
23  */
24 
25 package sun.jvm.hotspot.ui;
26 
27 import java.awt.*;
28 import java.io.*;
29 import javax.swing.*;
30 import sun.jvm.hotspot.runtime.*;
31 
32 /** A JPanel to show information about Java-level deadlocks. */
33 
34 public class DeadlockDetectionPanel extends JPanel {
DeadlockDetectionPanel()35     public DeadlockDetectionPanel() {
36         super();
37 
38         setLayout(new BorderLayout());
39 
40         // Simple at first
41         JScrollPane scroller = new JScrollPane();
42         JTextArea textArea = new JTextArea();
43         textArea = new JTextArea();
44         textArea.setEditable(false);
45         textArea.setLineWrap(true);
46         textArea.setWrapStyleWord(true);
47         scroller.getViewport().add(textArea);
48         add(scroller, BorderLayout.CENTER);
49 
50         ByteArrayOutputStream bos = new ByteArrayOutputStream();
51         PrintStream tty = new PrintStream(bos);
52         printDeadlocks(tty);
53         textArea.setText(bos.toString());
54     }
55 
printDeadlocks(PrintStream tty)56     private void printDeadlocks(PrintStream tty) {
57         DeadlockDetector.print(tty);
58     }
59 }
60