HeapParametersPanel.java

/*
 * Copyright (c) 2000, 2002, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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package sun.jvm.hotspot.ui;

import java.awt.*;
import java.io.*;
import javax.swing.*;

import sun.jvm.hotspot.memory.*;
import sun.jvm.hotspot.runtime.*;

/** Provides information about heap. FIXME: add back in information
    about card marking table (was present before GC interface). */

public class HeapParametersPanel extends JPanel {
  public HeapParametersPanel() {
    super();

    setLayout(new BorderLayout());

    // Simple at first
    JScrollPane scroller = new JScrollPane();
    JTextArea textArea = new JTextArea();
    textArea = new JTextArea();
    textArea.setEditable(false);
    textArea.setLineWrap(true);
    textArea.setWrapStyleWord(true);
    scroller.getViewport().add(textArea);
    add(scroller, BorderLayout.CENTER);

    Universe u = VM.getVM().getUniverse();
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    PrintStream tty = new PrintStream(bos);
    tty.println("Heap Parameters:");
    u.heap().printOn(tty);

    textArea.setText(bos.toString());
  }
}