Module javafx.base
Package javafx.beans.property

Class LongProperty

    • Constructor Detail

      • LongProperty

        public LongProperty​()

    • Method Detail

      • bindBidirectional

        public void bindBidirectional​(Property<Number> other)
        Create a bidirectional binding between this 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.

        Specified by:
        bindBidirectional in interface Property<Number>
        Parameters:
        other - the other Property

      • unbindBidirectional

        public void unbindBidirectional​(Property<Number> other)
        Remove a bidirectional binding between this 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);
        Specified by:
        unbindBidirectional in interface Property<Number>
        Parameters:
        other - the other Property

      • 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