Module javafx.base

Package javafx.beans

package javafx.beans

The package javafx.beans contains the interfaces that define the most generic form of observability. All other classes in the JavaFX library, that are observable, extend the Observable interface.

An implementation of Observable allows to attach an InvalidationListener. The contentBinding gets notified every time the Observable may have changed. Typical implementations of Observable are all properties, all bindings, ObservableList, and ObservableMap.

An InvalidationListener will get no further information, e.g. it will not get the old and the new value of a property. If you need more information consider using a ChangeListener for properties and bindings, ListChangeListener for ObservableLists or MapChangeListener for ObservableMap instead.

Related Packages

Package	Description
javafx.beans.binding	Provides classes that create and operate on a Binding that calculates a value that depends on one or more sources.
javafx.beans.property	The package javafx.beans.property defines read-only properties and writable properties, plus a number of implementations.
javafx.beans.value	The package javafx.beans.value contains the two fundamental interfaces ObservableValue and WritableValue and all of its sub-interfaces.

Class	Description
DefaultProperty	Specifies a property to which child elements will be added or set when an explicit property is not given.
InvalidationListener	An InvalidationListener is notified whenever an Observable becomes invalid.
NamedArg	Annotation that provides information about argument's name.
Observable	An Observable is an entity that wraps content and allows to observe the content for invalidations.
WeakInvalidationListener	A WeakInvalidationListener can be used if an Observable should only maintain a weak reference to the listener.
WeakListener	WeakListener is the super interface of all weak listener implementations in the JavaFX API.