View Javadoc
1   /*
2    * Copyright (c) 2002, 2003, 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  package sun.jvm.hotspot.ui;
26  
27  import java.awt.*;
28  import javax.swing.*;
29  
30  import sun.jvm.hotspot.runtime.*;
31  
32  /** Shows values of Java command line flags */
33  
34  public class VMFlagsPanel extends JPanel {
35      private JEditorPane         flagsPane;
36  
37      public VMFlagsPanel() {
38          initUI();
39      }
40  
41      private void initUI() {
42          setLayout(new BorderLayout());
43          flagsPane = new JEditorPane();
44          flagsPane.setContentType("text/html");
45          flagsPane.setEditable(false);
46          flagsPane.setText(getFlags());
47  
48          add(new JScrollPane(flagsPane), BorderLayout.CENTER);
49      }
50  
51      private String getFlags() {
52         VM.Flag[] flags = VM.getVM().getCommandLineFlags();
53         StringBuffer buf = new StringBuffer();
54         buf.append("<html><head><title>VM Command Line Flags</title></head><body>");
55         if (flags == null) {
56            buf.append("<b>Command Flag info not available (use 1.4.1_03 or later)!</b>");
57         } else {
58            buf.append("<table border='1'>");
59            for (int f = 0; f < flags.length; f++) {
60               buf.append("<tr><td>");
61               buf.append(flags[f].getName());
62               buf.append("</td><td>");
63               buf.append(flags[f].getValue());
64               buf.append("</td>");
65            }
66            buf.append("</table>");
67         }
68  
69         buf.append("</body></html>");
70         return buf.toString();
71      }
72  }