This is a utility class that can be used by beans that support constrained
properties. You can use an instance of this class as a member field
of your bean and delegate various work to it.
Report a vetoable property update to any registered listeners. If
anyone vetos the change, then fire a new event reverting everyone to
the old value and then rethrow the PropertyVetoException.
No event is fired if old and new are equal and non-null.
Parameters:
propertyName - The programmatic name of the property
that was changed.
Submit a bug or feature - Version 1.1.8 of Java Platform API Specification
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