This is a Java2-only bug. I compiled and ran the following program (from "Java 1.2 and JavaScript for C and C++ Programmers") on SunOS 5.6.

jdk 118 displayed just as the book said it would in Figure 3.6.... window containing a text string and an OK button.

jdk122 displayed only the title bar of the window. When I manually resized the window, the text string "A serious Error" never appeared. I only saw the OK button.

The bug still happens on jdk1.3beta.

In both cases I was displaying to an NT box running eXceed 6.0 and eXceed 6.2.
The machine running the java application was an Intel PPro 200mhz with 48mb ram and Solaris 2.6.


//----------------------------Warning.java-------------------------------
//package jwiley.chp3;

import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.Button;
import java.awt.Graphics;
import java.awt.Color;
import java.awt.Panel;
import java.awt.Point;

/**
 * Simple class to demonstrate inheritance.
 */
class Warning extends Frame implements ActionListener
{
    /** Warning message. */
    private String message;

    /** constructor. */
    Warning(String title, String WarningMessage)
    {
        super(title);
        message = new String(WarningMessage);
        Panel p = new Panel();
        Button okButton = new Button("OK");
        okButton.addActionListener(this);
        p.add("Center", okButton);
        add("South",p);
        setSize(200,100);
        setLocation(new Point(50,50));
        setForeground(Color.black);
        setBackground(Color.white);
        setVisible(true);
    }

    /** event handler. */
    public void actionPerformed(ActionEvent evt)
    {
        if ("OK".equals(evt.getActionCommand()))
        {
            System.exit(1);
        }
    }

    /** paint() method. */
    public void paint(Graphics g)
    {
        g.drawString(message,10,40);
    }

    /** main() method to invoke from JVM. */
    public static void main(String args[])
    {
        Warning anError = new Warning("Error", "A serious Error");
    }
}