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- All Known Implementing Classes:
WeakChangeListener
- Functional Interface:
- This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface ChangeListener<T>
AChangeListeneris notified whenever the value of anObservableValuechanges. It can be registered and unregistered withObservableValue.addListener(ChangeListener)respectivelyObservableValue.removeListener(ChangeListener)For an in-depth explanation of change events and how they differ from invalidation events, see the documentation of
ObservableValue.The same instance of
ChangeListenercan be registered to listen to multipleObservableValues.- Since:
- JavaFX 2.0
- See Also:
ObservableValue
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description voidchanged(ObservableValue<? extends T> observable, T oldValue, T newValue)Called when the value of anObservableValuechanges.
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Method Detail
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changed
void changed(ObservableValue<? extends T> observable, T oldValue, T newValue)
Called when the value of anObservableValuechanges.In general, it is considered bad practice to modify the observed value in this method.
- Parameters:
observable- TheObservableValuewhich value changedoldValue- The old valuenewValue- The new value
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