bean4.java~8~

java bean 编程程序

package chapter8;

import java.beans.*;

import javax.swing.*;

public class Bean4
    extends JTextField
{

    private String aaaa;
    private String bbbb;
    private transient PropertyChangeSupport propertyChangeListeners = new
        PropertyChangeSupport(this);

    public Bean4()
    {
        super("123123");
        try
        {
            jbInit();
        }
        catch (Exception exception)
        {
            exception.printStackTrace();
        }
    }

    private void jbInit()
        throws Exception
    {

    }

    public static void main(String[] args)
    {
        Bean4 bean4 = new Bean4();
    }

    public void setAaaa(String aaaa)
    {
        this.aaaa = aaaa;
        setText(aaaa);
    }

    public void setBbbb(String bbbb)
    {
        String oldBbbb = this.bbbb;
        this.bbbb = bbbb;
        propertyChangeListeners.firePropertyChange("bbbb", oldBbbb, bbbb);
    }

    public String getAaaa()
    {
        return aaaa;
    }

    public synchronized void removePropertyChangeListener(
        PropertyChangeListener l)
    {
        super.removePropertyChangeListener(l);
        if (propertyChangeListeners == null)
        {
            propertyChangeListeners = new PropertyChangeSupport(this);
        }
        propertyChangeListeners.removePropertyChangeListener(l);
    }

    public synchronized void addPropertyChangeListener(PropertyChangeListener l)
    {
        super.addPropertyChangeListener(l);
        if (propertyChangeListeners == null)
        {
            propertyChangeListeners = new PropertyChangeSupport(this);
        }
        propertyChangeListeners.addPropertyChangeListener(l);
    }

    public String getBbbb()
    {
        return bbbb;
    }
}