Class JavaBeanDoubleProperty

java.lang.Object

javafx.beans.binding.NumberExpressionBase

javafx.beans.binding.DoubleExpression

javafx.beans.property.ReadOnlyDoubleProperty

javafx.beans.property.DoubleProperty

javafx.beans.property.adapter.JavaBeanDoubleProperty

All Implemented Interfaces:

NumberExpression, Observable, JavaBeanProperty<Number>, ReadOnlyJavaBeanProperty<Number>, Property<Number>, ReadOnlyProperty<Number>, ObservableDoubleValue, ObservableNumberValue, ObservableValue<Number>, WritableDoubleValue, WritableNumberValue, WritableValue<Number>

public final class JavaBeanDoubleProperty
extends DoubleProperty
implements JavaBeanProperty<Number>

A JavaBeanDoubleProperty provides an adapter between a regular Java Bean property of type double or Double and a JavaFX DoubleProperty. It cannot be created directly, but a JavaBeanDoublePropertyBuilder has to be used.

As a minimum, the Java Bean class must implement a getter and a setter for the property. The class, as well as the getter and a setter methods, must be declared public. If the getter of an instance of this class is called, the property of the Java Bean is returned. If the setter is called, the value will be passed to the Java Bean property. If the Java Bean property is bound (i.e. it supports PropertyChangeListeners), this JavaBeanDoubleProperty will be aware of changes in the Java Bean. Otherwise it can be notified about changes by calling fireValueChangedEvent(). If the Java Bean property is also constrained (i.e. it supports VetoableChangeListeners), this JavaBeanDoubleProperty will reject changes, if it is bound to an ObservableValue<Double>.

Deploying an Application as a Module

If the Java Bean class is in a named module, then it must be reflectively accessible to the javafx.base module. A class is reflectively accessible if the module opens the containing package to at least the javafx.base module.

For example, if com.foo.MyBeanClass is in the foo.app module, the module-info.java might look like this:

module foo.app {
    opens com.foo to javafx.base;
}

Alternatively, a class is reflectively accessible if the module exports the containing package unconditionally.

Since:

JavaFX 2.1

See Also:

• DoubleProperty
• JavaBeanDoublePropertyBuilder

Method Summary

Modifier and Type	Method	Description
void	addListener(InvalidationListener listener)	Adds an InvalidationListener which will be notified whenever the Observable becomes invalid.
void	addListener(ChangeListener<? super Number> listener)	Adds a ChangeListener which will be notified whenever the value of the ObservableValue changes.
void	bind(ObservableValue<? extends Number> observable)	Create a unidirection binding for this Property.
void	dispose()	Signals to the JavaFX property that it will not be used anymore and any references can be removed.
void	fireValueChangedEvent()	This method can be called to notify the adapter of a change of the Java Bean value, if the Java Bean property is not bound (i.e.
double	get()	Returns the current value of this ObservableDoubleValue.
Object	getBean()	Returns the Object that contains this property.
String	getName()	Returns the name of this property.
boolean	isBound()	Can be used to check, if a Property is bound.
void	removeListener(InvalidationListener listener)	Removes the given listener from the list of listeners, that are notified whenever the value of the Observable becomes invalid.
void	removeListener(ChangeListener<? super Number> listener)	Removes the given listener from the list of listeners that are notified whenever the value of the ObservableValue changes.
void	set(double value)	Set the wrapped value.
String	toString()	Returns a string representation of this JavaBeanDoubleProperty object.
void	unbind()	Remove the unidirectional binding for this Property.

Methods declared in class javafx.beans.property.DoubleProperty

asObject, bindBidirectional, doubleProperty, setValue, unbindBidirectional

Methods declared in class javafx.beans.property.ReadOnlyDoubleProperty

readOnlyDoubleProperty

Methods declared in class javafx.beans.binding.DoubleExpression

add, add, add, add, add, divide, divide, divide, divide, divide, doubleExpression, doubleExpression, doubleValue, floatValue, getValue, intValue, longValue, multiply, multiply, multiply, multiply, multiply, negate, subtract, subtract, subtract, subtract, subtract

Methods declared in class javafx.beans.binding.NumberExpressionBase

asString, asString, asString, greaterThan, greaterThan, greaterThan, greaterThan, greaterThan, greaterThanOrEqualTo, greaterThanOrEqualTo, greaterThanOrEqualTo, greaterThanOrEqualTo, greaterThanOrEqualTo, isEqualTo, isEqualTo, isEqualTo, isEqualTo, isEqualTo, isEqualTo, isEqualTo, isEqualTo, isNotEqualTo, isNotEqualTo, isNotEqualTo, isNotEqualTo, isNotEqualTo, isNotEqualTo, isNotEqualTo, isNotEqualTo, lessThan, lessThan, lessThan, lessThan, lessThan, lessThanOrEqualTo, lessThanOrEqualTo, lessThanOrEqualTo, lessThanOrEqualTo, lessThanOrEqualTo, numberExpression

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods declared in interface javafx.beans.Observable

subscribe

Methods declared in interface javafx.beans.value.ObservableValue

flatMap, getValue, map, orElse, subscribe, subscribe, when

Methods declared in interface javafx.beans.property.Property

bindBidirectional, unbindBidirectional

Methods declared in interface javafx.beans.value.WritableValue

getValue

Method Details

get

public double get()

Returns the current value of this ObservableDoubleValue.

Specified by:

get in interface ObservableDoubleValue

Specified by:

get in interface WritableDoubleValue

Returns:

The current value

Throws:

UndeclaredThrowableException - if calling the getter of the Java Bean property throws an IllegalAccessException or an InvocationTargetException.

set

public void set(double value)

Set the wrapped value. Unlike WritableDoubleValue.setValue(java.lang.Number), this method uses primitive double.

Specified by:

set in interface WritableDoubleValue

Parameters:

value - The new value

Throws:

UndeclaredThrowableException - if calling the getter of the Java Bean property throws an IllegalAccessException or an InvocationTargetException.

bind

public void bind(ObservableValue<? extends Number> observable)

Create a unidirection binding for this Property.

Note that JavaFX has all the bind calls implemented through weak listeners. This means the bound property can be garbage collected and stopped from being updated.

Specified by:

bind in interface Property<Number>

Parameters:

observable - The observable this Property should be bound to.

unbind

public void unbind()

Remove the unidirectional binding for this Property. If the Property is not bound, calling this method has no effect.

Specified by:

unbind in interface Property<Number>

See Also:

• Property.bind(javafx.beans.value.ObservableValue)

isBound

public boolean isBound()

Can be used to check, if a Property is bound.

Specified by:

isBound in interface Property<Number>

Returns:

true if the Property is bound, false otherwise

See Also:

• Property.bind(javafx.beans.value.ObservableValue)

getBean

public Object getBean()

Returns the Object that contains this property. If this property is not contained in an Object, null is returned.

Specified by:

getBean in interface ReadOnlyProperty<Number>

Returns:

the containing Object or null

getName

public String getName()

Returns the name of this property. If the property does not have a name, this method returns an empty String.

Specified by:

getName in interface ReadOnlyProperty<Number>

Returns:

the name or an empty String

addListener

public void addListener(ChangeListener<? super Number> listener)

Adds a ChangeListener which will be notified whenever the value of the ObservableValue changes. If the same listener is added more than once, then it will be notified more than once. That is, no check is made to ensure uniqueness.

Note that the same actual ChangeListener instance may be safely registered for different ObservableValues.

The ObservableValue stores a strong reference to the listener which will prevent the listener from being garbage collected and may result in a memory leak. It is recommended to either unregister a listener by calling removeListener after use or to use an instance of WeakChangeListener avoid this situation.

Specified by:

addListener in interface ObservableValue<Number>

Parameters:

listener - The listener to register

See Also:

• ObservableValue.removeListener(ChangeListener)

removeListener

public void removeListener(ChangeListener<? super Number> listener)

Removes the given listener from the list of listeners that are notified whenever the value of the ObservableValue changes.

If the given listener has not been previously registered (i.e. it was never added) then this method call is a no-op. If it had been previously added then it will be removed. If it had been added more than once, then only the first occurrence will be removed.

Specified by:

removeListener in interface ObservableValue<Number>

Parameters:

listener - The listener to remove

See Also:

• ObservableValue.addListener(ChangeListener)

addListener

public void addListener(InvalidationListener listener)

Adds an InvalidationListener which will be notified whenever the Observable becomes invalid. If the same listener is added more than once, then it will be notified more than once. That is, no check is made to ensure uniqueness.

Note that the same actual InvalidationListener instance may be safely registered for different Observables.

The Observable stores a strong reference to the listener which will prevent the listener from being garbage collected and may result in a memory leak. It is recommended to either unregister a listener by calling removeListener after use or to use an instance of WeakInvalidationListener avoid this situation.

Specified by:

addListener in interface Observable

Parameters:

listener - The listener to register

See Also:

• Observable.removeListener(InvalidationListener)

removeListener

public void removeListener(InvalidationListener listener)

Removes the given listener from the list of listeners, that are notified whenever the value of the Observable becomes invalid.

If the given listener has not been previously registered (i.e. it was never added) then this method call is a no-op. If it had been previously added then it will be removed. If it had been added more than once, then only the first occurrence will be removed.

Specified by:

removeListener in interface Observable

Parameters:

listener - The listener to remove

See Also:

• Observable.addListener(InvalidationListener)

fireValueChangedEvent

public void fireValueChangedEvent()

This method can be called to notify the adapter of a change of the Java Bean value, if the Java Bean property is not bound (i.e. it does not support PropertyChangeListeners).

Specified by:

fireValueChangedEvent in interface ReadOnlyJavaBeanProperty<Number>

dispose

public void dispose()

Signals to the JavaFX property that it will not be used anymore and any references can be removed. A call of this method usually results in the property stopping to observe the Java Bean property by unregistering its listener(s).

Specified by:

dispose in interface ReadOnlyJavaBeanProperty<Number>

toString

public String toString()

Returns a string representation of this JavaBeanDoubleProperty object.

Overrides:

toString in class DoubleProperty

Returns:

a string representation of this JavaBeanDoubleProperty object.