Contact to javax.beans.binding

This little example will show you how to bind a JTextField to a name property of a Person with Beans Binding (JSR-295). First the Person:

package com.tutego.binding;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;

public class Person
private PropertyChangeSupport pcs = new PropertyChangeSupport( this );

private String name = "";

public void addPropertyChangeListener( PropertyChangeListener x )
pcs.addPropertyChangeListener( x );

public void removePropertyChangeListener( PropertyChangeListener x )
pcs.removePropertyChangeListener( x );

public String getName()
return name;

public void setName( String name )
String old = getName(); = name;
pcs.firePropertyChange( "name", old, getName() );

System.out.println( "Changed name!" );

The code for the JavaBean Person is a litte bit cumbersome because of the PropertyChangeListener who will notify the Binding Framework if the model change.

package com.tutego.binding;

import javax.beans.binding.BindingContext;
import javax.swing.JFrame;
import javax.swing.JTextField;

public class BindingDemo
public static void main( String[] args )
Person p = new Person();

JTextField tf = new JTextField();

BindingContext bindingContext = new BindingContext();
bindingContext.addBinding( p, "${name}", tf, "text" );

JFrame f = new JFrame();
f.add( tf );
f.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
f.setVisible( true );

p.setName( "Christian Ullenboom" );

Swing on the other side will although notify the model if the user type text in the text field and press Return. This will change the model.

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