"Java-Bean: True" missing after being packed in jar file

Question

Hi All
X86, Windows XP Professional, J2SDK 1.4.2
I complied a section of code ", which is from << Thinking In Java>>(3rd).
Created a manifest file "BangBean.tmp"
<<
Name: bangbean/BangBean.class
Java-Bean: True
>>
And then packed class files into "BangBean.jar" with command
"jar cfm BangBean.jar Bang BangBean.tmp bangbean".
It's puzzling that "Java-Bean: Ture" was missing in the "BangBean.jar/META-INF/MENIFEST.MF" .
<<
Manifest-Version: 1.0
Created-By: 1.4.2 (Sun Microsystems Inc.)
Name: bangbean/BangBean.class
>>
What's more, after altering the"BangBean.tmp" into this
<<
Java-Bean: True
Name: bangbean/BangBean.class
>>
and had a another try.
I got a jar file with such MENIFEST.MF.
<<
Manifest-Version: 1.0
Created-By: 1.4.2 (Sun Microsystems Inc.)
Java-Bean: True
Name: bangbean/BangBean.class
>>
This jar file worked well in BDK's beanbox.
I've test it with JSDK 1.5.0, the same thing happened.
And I didn't encounter such problem in other bean programs.
I've searched " 'Java-Bean: True' missing " with google, but didn't get proper answers.
Is there anybody who can give a prompt about why this happend?
Thanks a lot for your help!
code
//: bangbean:BangBean.java
// A graphical Bean.
package bangbean;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import com.bruceeckel.swing.*;
public class
BangBean extends JPanel implements Serializable {
private int xm, ym;
private int cSize = 20; // Circle size
private String text = "Bang!";
private int fontSize = 48;
private Color tColor = Color.RED;
private ActionListener actionListener;
public BangBean() {
addMouseListener(new ML());
addMouseMotionListener(new MML());
public int getCircleSize() { return cSize; }
public void setCircleSize(int newSize) {
cSize = newSize;
public String getBangText() { return text; }
public void setBangText(String newText) {
text = newText;
public int getFontSize() { return fontSize; }
public void setFontSize(int newSize) {
fontSize = newSize;
public Color getTextColor() { return tColor; }
public void setTextColor(Color newColor) {
tColor = newColor;
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.setColor(Color.BLACK);
g.drawOval(xm - cSize/2, ym - cSize/2, cSize, cSize);
// This is a unicast listener, which is
// the simplest form of listener management:
public void addActionListener(ActionListener l)
throws TooManyListenersException {
if(actionListener != null)
throw new TooManyListenersException();
actionListener = l;
public void removeActionListener(ActionListener l) {
actionListener = null;
class ML extends MouseAdapter {
public void mousePressed(MouseEvent e) {
Graphics g = getGraphics();
g.setColor(tColor);
g.setFont(
new Font("TimesRoman", Font.BOLD, fontSize));
int width = g.getFontMetrics().stringWidth(text);
g.drawString(text, (getSize().width - width) /2,
getSize().height/2);
g.dispose();
// Call the listener's method:
if(actionListener != null)
actionListener.actionPerformed(
new ActionEvent(BangBean.this,
ActionEvent.ACTION_PERFORMED, null));
class MML extends MouseMotionAdapter {
public void mouseMoved(MouseEvent e) {
xm = e.getX();
ym = e.getY();
repaint();
public Dimension getPreferredSize() {
return new Dimension(200, 200);
} ///:~
************************************************

Answer 1

Since you didn't use code-formatting tags ([ code ] and [ /code ] without the spaces) it's kinda hard to look at it. But I'm sure it DID execute much more than just the return statement - maybe you're not closing a file or db connection, or maybe you're seeing a cached page, so it actually isn't executing ANYTHING on the server (is your browser set to never check for newer pages so it (almost) always returns from cache, for example?)