一个BEAN
package beans;import java.awt.*;
import javax.swing.JLabel;
import java.beans.*;public class LabelBean extends JLabel {
// BorderLayout borderLayout1 = new BorderLayout();
private String sample = "Sample";
private PropertyChangeSupport changes=new PropertyChangeSupport(this);
public LabelBean() {
try {
jbInit();
}
catch(Exception ex) {
ex.printStackTrace();
}
}
private void jbInit() throws Exception {
//this.setLayout(borderLayout1);
}
public String getSample() {
return sample;
}
public void setSample(String sample) {
// this.sample = sample;
String oldSample=this.sample;
setText(sample);
changes.firePropertyChange("sample",oldSample,sample); }
public void addPropertyChangeListener(PropertyChangeListener l)
{
changes.addPropertyChangeListener(l);
}
public void removePropertyChangeListener(PropertyChangeListener l)
{
changes.removePropertyChangeListener(l);
}
}
package beans;import java.awt.*;
import javax.swing.JLabel;
import java.beans.*;public class LabelBean extends JLabel {
// BorderLayout borderLayout1 = new BorderLayout();
private String sample = "Sample";
private PropertyChangeSupport changes=new PropertyChangeSupport(this);
public LabelBean() {
try {
jbInit();
}
catch(Exception ex) {
ex.printStackTrace();
}
}
private void jbInit() throws Exception {
//this.setLayout(borderLayout1);
}
public String getSample() {
return sample;
}
public void setSample(String sample) {
// this.sample = sample;
String oldSample=this.sample;
setText(sample);
changes.firePropertyChange("sample",oldSample,sample); }
public void addPropertyChangeListener(PropertyChangeListener l)
{
changes.addPropertyChangeListener(l);
}
public void removePropertyChangeListener(PropertyChangeListener l)
{
changes.removePropertyChangeListener(l);
}
}
package beans;import java.awt.*;
import javax.swing.JTextField;
import java.beans.*;
import java.util.*;
import java.awt.event.*;public class TextBean extends JTextField {
// BorderLayout borderLayout1 = new BorderLayout();
private String showText;
private PropertyChangeSupport changes=new PropertyChangeSupport(this);
private transient Vector keyListeners;
public TextBean() {
try {
jbInit();
}
catch(Exception ex) {
ex.printStackTrace();
}
}
private void jbInit() throws Exception {
// this.setLayout(borderLayout1);
}
public String getShowText()
{
return showText;
}
public void setShowText(String newShowText)
{
String oldShowText=showText;
showText=newShowText;
setText(showText);
changes.firePropertyChange("showText",oldShowText,newShowText);
}
public void addPropertyChangeListener(PropertyChangeListener l)
{
changes.addPropertyChangeListener(l);
}
public void removePropertyChangeListener(PropertyChangeListener l)
{
changes.removePropertyChangeListener(l);
}
public synchronized void removeKeyListener(KeyListener l)
{
super.removeKeyListener(l);
if(keyListeners!=null&&keyListeners.contains(l))
{
Vector v=(Vector)keyListeners.clone();
v.removeElement(l);
keyListeners=v;
}
}
public synchronized void addKeyListener(KeyListener l)
{
super.addKeyListener(l);
Vector v=keyListeners==null?new Vector(2):(Vector)keyListeners.clone();
if(!v.contains(l))
{
v.addElement(l);
keyListeners=v;
}
}
protected void fireKeyTyped(KeyEvent e)
{
if(keyListeners!=null)
{
Vector listeners=keyListeners;
int count=listeners.size();
for(int i=0;i<count;i++)
((KeyListener)listeners.elementAt(i)).keyTyped(e); }
}
protected void fireKeyPressed(KeyEvent e)
{
if(keyListeners!=null)
{
Vector listeners=keyListeners;
int count=listeners.size();
for(int i=0;i<count;i++)
((KeyListener)listeners.elementAt(i)).keyPressed(e);
}
} protected void fireKeyReleased(KeyEvent e)
{
if(keyListeners!=null)
{
Vector listeners=keyListeners;
int count=listeners.size();
for(int i=0;i<count;i++)
((KeyListener)listeners.elementAt(i)).keyReleased(e);
}
}}
第46行是 new Bean2();