Name: dc32491 Date: 08/08/2000


Followings are steps for to reproduce the problem.

1. Make&compile attached demo program.
 * untitled1/Application1.java
 * untitled1/Frame1.java
 * untitled1/Frame1_AboutBox.java
2. Execute demo program.
 # login CDE by locale "C".
 % java untitled1.Application1
3. Click "jTextArea1".
4. Choice [Help|About] from Menu.
5. Click [OK] on "AboutBox".
6. Choice [Help] from Menu.
x. JVM crash with following message.

<<< JVM crash message <<<
# # An unexpected exception has been detected in native code outside the VM.# Program counter=0xfd1c0764
#
# Problematic Thread: prio=6 tid=0x2e0cf0 nid=0xb runnable
#
>>> JVM crash message >>>

<<< untitled1/Application1.java <<<
package untitled1;

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

public class Application1 {
  boolean packFrame = false;

  /**Construct the application*/
  public Application1() {
    Frame1 frame = new Frame1();
    //Validate frames that have preset sizes
    //Pack frames that have useful preferred size info, e.g. from their layout
    if (packFrame) {
      frame.pack();
    }
    else {
      frame.validate();
    }
    //Center the window
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = frame.getSize();
    if (frameSize.height > screenSize.height) {
      frameSize.height = screenSize.height;
    }
    if (frameSize.width > screenSize.width) {
      frameSize.width = screenSize.width;
    }
    frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
    frame.setVisible(true);
  }

  /**Main method*/
  public static void main(String[] args) {
    try {
// UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
      UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
    }
    catch(Exception e) {
      e.printStackTrace();
    }
    new Application1();
  }
>>> untitled1/Application1.java >>>

<<< untitled1/Frame1.java <<<
package untitled1;

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

public class Frame1 extends JFrame {
  JPanel contentPane;
  JMenuBar jMenuBar1 = new JMenuBar();
  JMenu jMenuFile = new JMenu();
  JMenuItem jMenuFileExit = new JMenuItem();
  JMenu jMenuHelp = new JMenu();
  JMenuItem jMenuHelpAbout = new JMenuItem();
  BorderLayout borderLayout1 = new BorderLayout();

  /**Construct the frame*/
  public Frame1() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }

  /**Component initialization*/
  private void jbInit() throws Exception {
    //setIconImage(Toolkit.getDefaultToolkit().createImage(Frame1.class.getResource("[Your Icon]")));
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(400, 300));
    this.setTitle("Frame Title");
    jMenuFile.setText("File");
    jMenuFileExit.setText("Exit");
    jMenuFileExit.addActionListener(new ActionListener() {

      public void actionPerformed(ActionEvent e) {
        jMenuFileExit_actionPerformed(e);
      }
    });
    jMenuHelp.setText("Help");
    jMenuHelpAbout.setText("About");
    jMenuHelpAbout.addActionListener(new ActionListener() {

      public void actionPerformed(ActionEvent e) {
        jMenuHelpAbout_actionPerformed(e);
      }
    });
    jTextArea1.setText("jTextArea1");
    jMenuFile.add(jMenuFileExit);
    jMenuHelp.add(jMenuHelpAbout);
    jMenuBar1.add(jMenuFile);
    jMenuBar1.add(jMenuHelp);
    contentPane.add(jTextArea1, BorderLayout.CENTER);
    this.setJMenuBar(jMenuBar1);
  }

  /**File | Exit action performed*/
  public void jMenuFileExit_actionPerformed(ActionEvent e) {
    System.exit(0);
  }

  boolean bInputMethods = true;
  JTextArea jTextArea1 = new JTextArea();

  /**Help | About action performed*/
  public void jMenuHelpAbout_actionPerformed(ActionEvent e) {
    Frame1_AboutBox dlg = new Frame1_AboutBox(this);
    Dimension dlgSize = dlg.getPreferredSize();
    Dimension frmSize = getSize();
    Point loc = getLocation();
    dlg.setLocation((frmSize.width - dlgSize.width) / 2 + loc.x, (frmSize.height - dlgSize.height) / 2 + loc.y);
    dlg.setModal(true);
    dlg.show();
    bInputMethods = !bInputMethods;
    jTextArea1.enableInputMethods(bInputMethods);
  }

  /**Overridden so we can exit when window is closed*/
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      jMenuFileExit_actionPerformed(null);
    }
  }
>>> untitled1/Frame1.java >>>

<<< untitled1/Frame1_AboutBox.java <<<
package untitled1;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;

public class Frame1_AboutBox extends JDialog implements ActionListener {

  JPanel panel1 = new JPanel();
  JPanel panel2 = new JPanel();
  JPanel insetsPanel1 = new JPanel();
  JPanel insetsPanel2 = new JPanel();
  JPanel insetsPanel3 = new JPanel();
  JButton button1 = new JButton();
  JLabel imageLabel = new JLabel();
  JLabel label1 = new JLabel();
  JLabel label2 = new JLabel();
  JLabel label3 = new JLabel();
  JLabel label4 = new JLabel();
  BorderLayout borderLayout1 = new BorderLayout();
  BorderLayout borderLayout2 = new BorderLayout();
  FlowLayout flowLayout1 = new FlowLayout();
  GridLayout gridLayout1 = new GridLayout();
  String product = "";
  String version = "1.0";
  String copyright = "Copyright (c) 2000";
  String comments = "";
  public Frame1_AboutBox(Frame parent) {
    super(parent);
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
    pack();
  }

  /**Component initialization*/
  private void jbInit() throws Exception {
    //imageLabel.setIcon(new ImageIcon(Frame1_AboutBox.class.getResource("[Your Image]")));
    this.setTitle("About");
    setResizable(false);
    panel1.setLayout(borderLayout1);
    panel2.setLayout(borderLayout2);
    insetsPanel1.setLayout(flowLayout1);
    insetsPanel2.setLayout(flowLayout1);
    insetsPanel2.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
    gridLayout1.setRows(4);
    gridLayout1.setColumns(1);
    label1.setText(product);
    label2.setText(version);
    label3.setText(copyright);
    label4.setText(comments);
    insetsPanel3.setLayout(gridLayout1);
    insetsPanel3.setBorder(BorderFactory.createEmptyBorder(10, 60, 10, 10));
    button1.setText("Ok");
    button1.addActionListener(this);
    insetsPanel2.add(imageLabel, null);
    panel2.add(insetsPanel2, BorderLayout.WEST);
    this.getContentPane().add(panel1, null);
    insetsPanel3.add(label1, null);
    insetsPanel3.add(label2, null);
    insetsPanel3.add(label3, null);
    insetsPanel3.add(label4, null);
    panel2.add(insetsPanel3, BorderLayout.CENTER);
    insetsPanel1.add(button1, null);
    panel1.add(insetsPanel1, BorderLayout.SOUTH);
    panel1.add(panel2, BorderLayout.NORTH);
  }

  /**Overridden so we can exit when window is closed*/
  protected void processWindowEvent(WindowEvent e) {
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      cancel();
    }
    super.processWindowEvent(e);
  }

  /**Close the dialog*/
  void cancel() {
    dispose();
  }

  /**Close the dialog on a button event*/
  public void actionPerformed(ActionEvent e) {
    if (e.getSource() == button1) {
      cancel();
    }
  }
>>> untitled1/Frame1_AboutBox.java >>>
(Review ID: 108058)
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