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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
21   * questions.
22   *
23   */
24  
25  package sun.jvm.hotspot.ui;
26  
27  import java.awt.*;
28  import java.util.*;
29  import javax.swing.*;
30  
31  import sun.jvm.hotspot.runtime.*;
32  
33  /** Shows values of Java System properties. */
34  
35  public class SysPropsPanel extends JPanel {
36      private SAEditorPane         flagsPane;
37  
38      public SysPropsPanel() {
39          initUI();
40      }
41  
42      private void initUI() {
43          setLayout(new BorderLayout());
44          flagsPane = new SAEditorPane();
45          flagsPane.setText(getFlags());
46  
47          add(new JScrollPane(flagsPane), BorderLayout.CENTER);
48      }
49  
50      private String getFlags() {
51         final StringBuffer buf = new StringBuffer();
52         buf.append("<html><head><title>System Properties</title></head><body>");
53         buf.append("<table border='1'>");
54  
55         Properties sysProps = VM.getVM().getSystemProperties();
56         if (sysProps != null) {
57            Enumeration keys = sysProps.keys();
58            while (keys.hasMoreElements()) {
59               Object key = keys.nextElement();
60               buf.append("<tr><td>");
61               buf.append(key.toString());
62               buf.append("</td><td>");
63               buf.append(sysProps.get(key).toString());
64               buf.append("</td></tr>");
65            }
66         } else {
67            buf.append("<tr><td>System Properties info not available!</td></tr>");
68         }
69         buf.append("</table>");
70         buf.append("</body></html>");
71         return buf.toString();
72      }
73  }