I took this text from 4387314, since the evaluator felt it was unrelated
to the original bug.

###@###.### 2002-09-30



Name: yyT116575 Date: 11/28/2000


java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0)
Java HotSpot(TM) Client VM (build 1.3.0, mixed mode)

Since Java 1.2 the AWT Dialog has had a number of problems evident when run
on Linux and to some extent even on Sparc platforms.

When a Dialog is requested to be displayed for the second time, it does
not always appear on the screen. If it is a modal dialog, the whole
program is then locked up in an unusable state.

JDK 1.3 does not fix the problem. It does not appear on the Windows
version of Java. The problem is evident even in the example program
that Sun provided on the use of Dialogs (DialogWindow.java below). This
works fine when run in Netscape (JDK 1.1).

I have played with the code and have learned a little about how to avoid
the problem. Of the many ways of removing a Dialog from the screen when
it is no longer wanted (eg. hide(), setVisible(false), dispose(),
removeNotify() ), the first two cause problems. However, I have found
that if dispose() is used then the second display of the Dialog is always
successful.

I am using fvwm2 window manager on either my Linux pc running Red Hat 6.2
or on our Sparc SUNW,Ultra-Enterprise running Solaris 5.7 and accessed
via a Tektronix X-terminal.

-------------------------------------------------------------------------
import java.awt.*;
import java.awt.event.*;

public class DialogWindow extends Frame
                          implements ActionListener {
    boolean inAnApplet = true; //should be private
    private SimpleDialog dialog;
    private TextArea textArea;
    String newline;

    public DialogWindow() {
        textArea = new TextArea(5, 40);
        textArea.setEditable(false);
        add("Center", textArea);
        Button button = new Button("Click to bring up dialog");
        button.addActionListener(this);
        Panel panel = new Panel();
        panel.add(button);
        add("South", panel);

        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                if (inAnApplet) {
                    setVisible(false);
                    dispose();
                } else {
                    System.exit(0);
                }
            }
        });

        newline = System.getProperty("line.separator");
    }

    public void actionPerformed(ActionEvent event) {
        if (dialog == null) {
            dialog = new SimpleDialog(this, "A Simple Dialog");
        }
        dialog.setVisible(true);
    }

    public void setText(String text) {
        textArea.append(text + newline);
    }

    public static void main(String args[]) {
        DialogWindow window = new DialogWindow();
        window.inAnApplet = false;

        window.setTitle("DialogWindow Application");
        window.pack();
        window.setVisible(true);
    }
}

class SimpleDialog extends Dialog implements ActionListener {
    TextField field;
    DialogWindow parent;
    Button setButton;

    SimpleDialog(Frame dw, String title) {
        super(dw, title, false);
        parent = (DialogWindow)dw;

        //Create middle section.
        Panel p1 = new Panel();
        Label label = new Label("Enter random text here:");
        p1.add(label);
        field = new TextField(40);
        field.addActionListener(this);
        p1.add(field);
        add("Center", p1);

        //Create bottom row.
        Panel p2 = new Panel();
        p2.setLayout(new FlowLayout(FlowLayout.RIGHT));
        Button b = new Button("Cancel");
        b.addActionListener(this);
        setButton = new Button("Set");
        setButton.addActionListener(this);
        p2.add(b);
        p2.add(setButton);
        add("South", p2);

        //Initialize this dialog to its preferred size.
        pack();
    }

    public void actionPerformed(ActionEvent event) {
        Object source = event.getSource();
        if ( (source == setButton)
           | (source == field)) {
            parent.setText(field.getText());
        }
        field.selectAll();
        setVisible(false);
        //dispose();
    }
}
// If the dispose() is uncommented (to replace the preceding setVisible),
// the Dialog is successfully displayed on the second and subsequent
// attempts as well as the first one.
(Review ID: 112717)