Java Platform 1.2

javax.swing.event
Class SwingPropertyChangeSupport

java.lang.Object
  |
  +--java.beans.PropertyChangeSupport
        |
        +--javax.swing.event.SwingPropertyChangeSupport

public final class SwingPropertyChangeSupport
extends PropertyChangeSupport

This subclass of java.beans.PropertyChangeSupport is identical in functionality -- it sacrifices thread-safety (not a Swing concern) for reduce memory consumption, which helps performance (both big Swing concerns). Most of the overridden methods are only necessary because all of PropertyChangeSupport's instance data is private, without accessor methods.

See Also:
Serialized Form

Constructor Summary
SwingPropertyChangeSupport(Object sourceBean)
          Constructs a SwingPropertyChangeSupport object.
 
Method Summary
 void addPropertyChangeListener(PropertyChangeListener listener)
          Add a PropertyChangeListener to the listener list.
 void addPropertyChangeListener(String propertyName, PropertyChangeListener listener)
          Add a PropertyChangeListener for a specific property.
 void firePropertyChange(PropertyChangeEvent evt)
          Fire an existing PropertyChangeEvent to any registered listeners.
 void firePropertyChange(String propertyName, Object oldValue, Object newValue)
          Report a bound property update to any registered listeners.
 boolean hasListeners(String propertyName)
          Check if there are any listeners for a specific property.
 void removePropertyChangeListener(PropertyChangeListener listener)
          Remove a PropertyChangeListener from the listener list.
 void removePropertyChangeListener(String propertyName, PropertyChangeListener listener)
          Remove a PropertyChangeListener for a specific property.
 
Methods inherited from class java.beans.PropertyChangeSupport
firePropertyChange, firePropertyChange
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SwingPropertyChangeSupport

public SwingPropertyChangeSupport(Object sourceBean)
Constructs a SwingPropertyChangeSupport object.
Parameters:
sourceBean - The bean to be given as the source for any events.
Method Detail

addPropertyChangeListener

public void addPropertyChangeListener(PropertyChangeListener listener)
Add a PropertyChangeListener to the listener list. The listener is registered for all properties.
Parameters:
listener - The PropertyChangeListener to be added
Overrides:
addPropertyChangeListener in class PropertyChangeSupport

removePropertyChangeListener

public void removePropertyChangeListener(PropertyChangeListener listener)
Remove a PropertyChangeListener from the listener list. This removes a PropertyChangeListener that was registered for all properties.
Parameters:
listener - The PropertyChangeListener to be removed
Overrides:
removePropertyChangeListener in class PropertyChangeSupport

addPropertyChangeListener

public void addPropertyChangeListener(String propertyName,
                                      PropertyChangeListener listener)
Add a PropertyChangeListener for a specific property. The listener will be invoked only when a call on firePropertyChange names that specific property.
Parameters:
propertyName - The name of the property to listen on.
listener - The PropertyChangeListener to be added
Overrides:
addPropertyChangeListener in class PropertyChangeSupport

removePropertyChangeListener

public void removePropertyChangeListener(String propertyName,
                                         PropertyChangeListener listener)
Remove a PropertyChangeListener for a specific property.
Parameters:
propertyName - The name of the property that was listened on.
listener - The PropertyChangeListener to be removed
Overrides:
removePropertyChangeListener in class PropertyChangeSupport

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.
Overrides:
firePropertyChange in class PropertyChangeSupport

firePropertyChange

public void firePropertyChange(PropertyChangeEvent evt)
Fire an existing PropertyChangeEvent to any registered listeners. No event is fired if the given event's old and new values are equal and non-null.
Parameters:
evt - The PropertyChangeEvent object.
Overrides:
firePropertyChange in class PropertyChangeSupport

hasListeners

public boolean hasListeners(String propertyName)
Check if there are any listeners for a specific property.
Parameters:
propertyName - the property name.
Returns:
true if there are ore or more listeners for the given property
Overrides:
hasListeners in class PropertyChangeSupport

Java Platform 1.2

Submit a bug or feature Version 1.2 of Java Platform API Specification
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