How does JavaBeans Property Adapter work?

Question

What I\'m trying to do works fine if I follow the JavaFX property definition described here. Now, instead, I want to define properties from Java Beans objects using Java Bea

Answer 1

I think the issue here is that Person is indeed a POJO, but not a JavaBean: It is missing the hooks for PropertyChangeListeners. Java will not magically know when Person#name changes. Instead, the JavaFX adapter will look for a way to add a PropertyChangeListener and listen to events for a property called 'name'. If you add a PropertyChangeSupport instance to your Person class it will work as expected:

public class Person {
    private String name;
    private PropertyChangeSupport _changeSupport;

    public Person() {
        _changeSupport = new PropertyChangeSupport(this);
    }

    public String getName() {
        return name;
    }

    public void setName( String name ) {
        final String prev = this.name;
        this.name = name;
        _changeSupport.firePropertyChange("name", prev, name);
    }

    public void addPropertyChangeListener(final PropertyChangeListener listener) {
        _changeSupport.addPropertyChangeListener(listener);
    }
}