Class LongProperty

javafx.beans.property.LongProperty

All Implemented Interfaces:: NumberExpression, Observable, Property<Number>, ReadOnlyProperty<Number>, ObservableLongValue, ObservableNumberValue, ObservableValue<Number>, WritableLongValue, WritableNumberValue, WritableValue<Number>

Direct Known Subclasses:: JavaBeanLongProperty, LongPropertyBase

public abstract class LongProperty
extends ReadOnlyLongProperty
implements Property<Number>, WritableLongValue

This class defines a Property wrapping a long value.

The value of a LongProperty can be get and set with ObservableLongValue.get(), ObservableValue.getValue(), WritableLongValue.set(long), and WritableLongValue.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 Property.bindBidirectional(Property) and Property.unbindBidirectional(Property).

The context of a LongProperty 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 WritableLongValue.setValue(java.lang.Number).

Since:: JavaFX 2.0
See Also:: ObservableLongValue, WritableLongValue, ReadOnlyLongProperty, Property

Constructor Summary

Constructors
Constructor	Description
`LongProperty()`	Creates a default `LongProperty`.

Method Summary

Modifier and Type	Method	Description
`ObjectProperty<Long>`	`asObject()`	Creates an `ObjectProperty` that bidirectionally bound to this `LongProperty`.
`static LongProperty`	`longProperty(Property<Long> property)`	Returns a `LongProperty` that wraps a `Property` and is bidirectionally bound to it.
`String`	`toString()`	Returns a string representation of this `LongProperty` object.

Methods declared in class javafx.beans.property.ReadOnlyLongProperty

readOnlyLongProperty

Methods declared in class javafx.beans.binding.LongExpression

add, add, add, add, divide, divide, divide, divide, longExpression, longExpression, multiply, multiply, multiply, multiply, negate, subtract, subtract, subtract, subtract

Methods declared in class javafx.beans.binding.NumberExpressionBase

numberExpression

Methods declared in class java.lang.Object

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

Methods declared in interface javafx.beans.binding.NumberExpression

add, asString, asString, asString, divide, 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, multiply, subtract

Methods declared in interface javafx.beans.Observable

addListener, removeListener

Methods declared in interface javafx.beans.value.ObservableLongValue

get

Methods declared in interface javafx.beans.value.ObservableNumberValue

doubleValue, floatValue, intValue, longValue

Methods declared in interface javafx.beans.value.ObservableValue

addListener, getValue, removeListener

Methods declared in interface javafx.beans.property.Property

bind, bindBidirectional, isBound, unbind, unbindBidirectional

Methods declared in interface javafx.beans.property.ReadOnlyProperty

getBean, getName

Methods declared in interface javafx.beans.value.WritableLongValue

get, set, setValue

Methods declared in interface javafx.beans.value.WritableValue

getValue

Constructor Details

LongProperty

public LongProperty()

Creates a default LongProperty.

Method Details

toString

public String toString()

Returns a string representation of this LongProperty object.

Overrides:: toString in class ReadOnlyLongProperty
Returns:: a string representation of this LongProperty object.

longProperty

public static LongProperty longProperty(Property<Long> property)

Returns a LongProperty 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<Long> and a LongProperty.

   LongProperty longProperty = new SimpleLongProperty(1L);
   ObjectProperty<Long> objectProperty = new SimpleObjectProperty<>(2L);

   // Need to keep the reference as bidirectional binding uses weak references
   LongProperty objectAsLong = LongProperty.longProperty(objectProperty);

   longProperty.bindBidirectional(objectAsLong);

Another approach is to convert the LongProperty to ObjectProperty using asObject() method.

Note: null values in the source property will be interpreted as 0L

Parameters:: property - The source Property
Returns:: A LongProperty that wraps the Property
Throws:: NullPointerException - if property is null
Since:: JavaFX 8.0
See Also:: asObject()

asObject

public ObjectProperty<Long> asObject()

Creates an ObjectProperty that bidirectionally bound to this LongProperty. If the value of this LongProperty changes, the value of the ObjectProperty will be updated automatically and vice-versa.

Can be used for binding an ObjectProperty to LongProperty.

   LongProperty longProperty = new SimpleLongProperty(1L);
   ObjectProperty<Long> objectProperty = new SimpleObjectProperty<>(2L);

   objectProperty.bind(longProperty.asObject());

Overrides:: asObject in class ReadOnlyLongProperty
Returns:: the new ObjectProperty
Since:: JavaFX 8.0

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Documentation extracted from JavaFX API Documentation.
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