public abstract class DoubleProperty extends ReadOnlyDoubleProperty implements Property<Number>, WritableDoubleValue
Property wrapping a double value.
The value of a DoubleProperty can be get and set with ObservableDoubleValue.get(),
DoubleExpression.getValue(), WritableDoubleValue.set(double), and setValue(Number).
A property can be bound and unbound unidirectional with
Property.bind(ObservableValue) and Property.unbind(). Bidirectional bindings
can be created and removed with bindBidirectional(Property) and
unbindBidirectional(Property).
The context of a DoubleProperty can be read with ReadOnlyProperty.getBean()
and ReadOnlyProperty.getName().
Note: setting or binding this property to a null value will set the property to "0.0". See setValue(java.lang.Number).
ObservableDoubleValue,
WritableDoubleValue,
ReadOnlyDoubleProperty,
Property| Constructor and Description |
|---|
DoubleProperty() |
| Modifier and Type | Method and Description |
|---|---|
ObjectProperty<Double> |
asObject()
Creates an
ObjectProperty
that bidirectionally bound to this DoubleProperty. |
void |
bindBidirectional(Property<Number> other)
Create a bidirectional binding between this
Property and another
one. |
static DoubleProperty |
doubleProperty(Property<Double> property)
Returns a
DoubleProperty that wraps a
Property and is
bidirectionally bound to it. |
void |
setValue(Number v)
Set the wrapped value.
|
String |
toString()
Returns a string representation of this
DoubleProperty object. |
void |
unbindBidirectional(Property<Number> other)
Remove a bidirectional binding between this
Property and another
one. |
readOnlyDoublePropertyadd, 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, subtractasString, 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, numberExpressionclone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, waitgetBean, getNameaddListener, getValue, removeListeneraddListener, removeListenerget, setgetValuegetpublic void setValue(Number v)
setValue in interface WritableDoubleValuesetValue in interface WritableValue<Number>v - The new valuepublic void bindBidirectional(Property<Number> other)
Property and another
one.
Bidirectional bindings exists independently of unidirectional bindings. So it is possible to
add unidirectional binding to a property with bidirectional binding and vice-versa. However, this practice is
discouraged.
It is possible to have multiple bidirectional bindings of one Property.
JavaFX bidirectional binding implementation use weak listeners. This means bidirectional binding does not prevent properties from being garbage collected.
bindBidirectional in interface Property<Number>other - the other Propertypublic void unbindBidirectional(Property<Number> other)
Property and another
one.
If no bidirectional binding between the properties exists, calling this
method has no effect.
It is possible to unbind by a call on the second property. This code will work:
property1.bindBirectional(property2);
property2.unbindBidirectional(property1);
unbindBidirectional in interface Property<Number>other - the other Propertypublic String toString()
DoubleProperty object.toString in class ReadOnlyDoublePropertyDoubleProperty object.public static DoubleProperty doubleProperty(Property<Double> property)
DoubleProperty that wraps a
Property and is
bidirectionally bound to it.
Changing this property will result in a change of the original property.
This is very useful when bidirectionally binding an ObjectProperty
Note: null values in the source property will be interpreted as 0.0
Another approach is to convert the DoubleProperty to ObjectProperty using
DoubleProperty doubleProperty = new SimpleDoubleProperty(1.0);
ObjectProperty<Double> objectProperty = new SimpleObjectProperty<>(2.0);
// Need to keep the reference as bidirectional binding uses weak references
DoubleProperty objectAsDouble = DoubleProperty.doubleProperty(objectProperty);
doubleProperty.bindBidirectional(objectAsDouble);
asObject() method.
property - The source PropertyDoubleProperty that wraps the
PropertyNullPointerException - if property is nullasObject()public ObjectProperty<Double> asObject()
ObjectProperty
that bidirectionally bound to this DoubleProperty. If the
value of this DoubleProperty changes, the value of the
ObjectProperty will be updated automatically and vice-versa.
Can be used for binding an ObjectProperty to DoubleProperty.
DoubleProperty doubleProperty = new SimpleDoubleProperty(1.0); ObjectProperty<Double> objectProperty = new SimpleObjectProperty<>(2.0); objectProperty.bind(doubleProperty.asObject());
asObject in class ReadOnlyDoublePropertyObjectPropertySubmit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 2008, 2017, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.