Class java.beans.PropertyChangeSupport - JDK 5 Documentation v1.1.8, Java 2 SDK 英文文档

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Class java.beans.PropertyChangeSupport

java.lang.Object
   |
   +----java.beans.PropertyChangeSupport

public class PropertyChangeSupport
extends Object
implements Serializable

This is a utility class that can be used by beans that support bound properties. You can use an instance of this class as a member field of your bean and delegate various work to it.

PropertyChangeSupport(Object)

addPropertyChangeListener(PropertyChangeListener): Add a PropertyChangeListener to the listener list.
firePropertyChange(String, Object, Object): Report a bound property update to any registered listeners.
removePropertyChangeListener(PropertyChangeListener): Remove a PropertyChangeListener from the listener list.

PropertyChangeSupport

 public PropertyChangeSupport(Object sourceBean)

addPropertyChangeListener

 public synchronized void addPropertyChangeListener(PropertyChangeListener listener)

Add a PropertyChangeListener to the listener list.

Parameters:: listener - The PropertyChangeListener to be added

removePropertyChangeListener

 public synchronized void removePropertyChangeListener(PropertyChangeListener listener)

Remove a PropertyChangeListener from the listener list.

Parameters:: listener - The PropertyChangeListener to be removed

firePropertyChange

 public void firePropertyChange(String propertyName,
                                Object oldValue,
                                Object newValue)

Report a bound property update to any registered listeners. No event is fired if old and new are equal and non-null.

Parameters:: propertyName - The programmatic name of the property that was changed.; oldValue - The old value of the property.; newValue - The new value of the property.

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