javafx.beans.value

public Interface ChangeListener<T>

Known Direct Implementers

Annotations

Type Parameters

A ChangeListener is notified whenever the value of an ObservableValue changes. It can be registered and unregistered with ObservableValue#addListener(ChangeListener) respectively ObservableValue#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 ChangeListener can be registered to listen to multiple ObservableValues.

Method Summary

Modifier and Type	Method and Description
public void	changed(ObservableValue<? extends T> The `ObservableValue` which value changed observable, T The old value oldValue, T The new value newValue) Called when the value of an `ObservableValue` changes.

changed back to summary

changed	back to summary
public void changed(ObservableValue<? extends T> observable, T oldValue, T newValue) Called when the value of an `ObservableValue` changes. In general, it is considered bad practice to modify the observed value in this method. Parameters observable:ObservableValue<? extends T> The `ObservableValue` which value changed oldValue:T The old value newValue:T The new value

public void changed(ObservableValue<? extends T> observable, T oldValue, T newValue)

Called when the value of an ObservableValue changes.

In general, it is considered bad practice to modify the observed value in this method.

Parameters

observable:ObservableValue<? extends T>: The ObservableValue which value changed
oldValue:T: The old value
newValue:T: The new value