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1   /*
2    * Copyright (c) 2000, 2002, 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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23   */
24  
25  package sun.jvm.hotspot.ui;
26  
27  import java.awt.*;
28  import java.io.*;
29  import javax.swing.*;
30  
31  import sun.jvm.hotspot.memory.*;
32  import sun.jvm.hotspot.runtime.*;
33  
34  /** Provides information about heap. FIXME: add back in information
35      about card marking table (was present before GC interface). */
36  
37  public class HeapParametersPanel extends JPanel {
38    public HeapParametersPanel() {
39      super();
40  
41      setLayout(new BorderLayout());
42  
43      // Simple at first
44      JScrollPane scroller = new JScrollPane();
45      JTextArea textArea = new JTextArea();
46      textArea = new JTextArea();
47      textArea.setEditable(false);
48      textArea.setLineWrap(true);
49      textArea.setWrapStyleWord(true);
50      scroller.getViewport().add(textArea);
51      add(scroller, BorderLayout.CENTER);
52  
53      Universe u = VM.getVM().getUniverse();
54      ByteArrayOutputStream bos = new ByteArrayOutputStream();
55      PrintStream tty = new PrintStream(bos);
56      tty.println("Heap Parameters:");
57      u.heap().printOn(tty);
58  
59      textArea.setText(bos.toString());
60    }
61  }