Class FloatExpression

java.lang.Object

javafx.beans.binding.NumberExpressionBase

javafx.beans.binding.FloatExpression

All Implemented Interfaces:: NumberExpression, Observable, ObservableFloatValue, ObservableNumberValue, ObservableValue<Number>

Direct Known Subclasses:: FloatBinding, ReadOnlyFloatProperty

public abstract class FloatExpression
extends NumberExpressionBase
implements ObservableFloatValue

FloatExpression is an ObservableFloatValue plus additional convenience methods to generate bindings in a fluent style.

A concrete sub-class of FloatExpression has to implement the method ObservableFloatValue.get(), which provides the actual value of this expression.

Since:: JavaFX 2.0

Constructor Summary

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

Method Summary

Modifier and Type	Method	Description
`DoubleBinding`	`add(double other)`	Creates a new `NumberBinding` that calculates the sum of this `NumberExpression` and a constant value.
`FloatBinding`	`add(float other)`	Creates a new `NumberBinding` that calculates the sum of this `NumberExpression` and a constant value.
`FloatBinding`	`add(int other)`	Creates a new `NumberBinding` that calculates the sum of this `NumberExpression` and a constant value.
`FloatBinding`	`add(long other)`	Creates a new `NumberBinding` that calculates the sum of this `NumberExpression` and a constant value.
`ObjectExpression<Float>`	`asObject()`	Creates an `ObjectExpression` that holds the value of this `FloatExpression`.
`DoubleBinding`	`divide(double other)`	Creates a new `NumberBinding` that calculates the division of this `NumberExpression` and a constant value.
`FloatBinding`	`divide(float other)`	Creates a new `NumberBinding` that calculates the division of this `NumberExpression` and a constant value.
`FloatBinding`	`divide(int other)`	Creates a new `NumberBinding` that calculates the division of this `NumberExpression` and a constant value.
`FloatBinding`	`divide(long other)`	Creates a new `NumberBinding` that calculates the division of this `NumberExpression` and a constant value.
`static FloatExpression`	`floatExpression(ObservableFloatValue value)`	Returns a `FloatExpression` that wraps a `ObservableFloatValue`.
`static <T extends Number> FloatExpression`	`floatExpression(ObservableValue<T> value)`	Returns a `FloatExpression` that wraps an `ObservableValue`.
`DoubleBinding`	`multiply(double other)`	Creates a new `NumberBinding` that calculates the product of this `NumberExpression` and a constant value.
`FloatBinding`	`multiply(float other)`	Creates a new `NumberBinding` that calculates the product of this `NumberExpression` and a constant value.
`FloatBinding`	`multiply(int other)`	Creates a new `NumberBinding` that calculates the product of this `NumberExpression` and a constant value.
`FloatBinding`	`multiply(long other)`	Creates a new `NumberBinding` that calculates the product of this `NumberExpression` and a constant value.
`FloatBinding`	`negate()`	Creates a new `NumberBinding` that calculates the negation of `NumberExpression`.
`DoubleBinding`	`subtract(double other)`	Creates a new `NumberBinding` that calculates the difference of this `NumberExpression` and a constant value.
`FloatBinding`	`subtract(float other)`	Creates a new `NumberBinding` that calculates the difference of this `NumberExpression` and a constant value.
`FloatBinding`	`subtract(int other)`	Creates a new `NumberBinding` that calculates the difference of this `NumberExpression` and a constant value.
`FloatBinding`	`subtract(long other)`	Creates a new `NumberBinding` that calculates the difference of this `NumberExpression` and a constant value.

Methods declared in class javafx.beans.binding.NumberExpressionBase

numberExpression

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, 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.ObservableFloatValue

get

Methods declared in interface javafx.beans.value.ObservableNumberValue

doubleValue, floatValue, intValue, longValue

Methods declared in interface javafx.beans.value.ObservableValue

addListener, getValue, removeListener

Constructor Details

FloatExpression

public FloatExpression()

Creates a default FloatExpression.

Method Details

floatExpression

public static FloatExpression floatExpression(ObservableFloatValue value)

Returns a FloatExpression that wraps a ObservableFloatValue. If the ObservableFloatValue is already a FloatExpression, it will be returned. Otherwise a new FloatBinding is created that is bound to the ObservableFloatValue.

Parameters:: value - The source ObservableFloatValue
Returns:: A FloatExpression that wraps the ObservableFloatValue if necessary
Throws:: NullPointerException - if value is null

floatExpression

public static <T extends Number> FloatExpression floatExpression(ObservableValue<T> value)

Returns a FloatExpression that wraps an ObservableValue. If the ObservableValue is already a FloatExpression, it will be returned. Otherwise a new FloatBinding is created that is bound to the ObservableValue.

Note: this method can be used to convert an ObjectExpression or ObjectProperty of specific number type to FloatExpression, which is essentially an ObservableValue<Number>. See sample below.

   FloatProperty floatProperty = new SimpleFloatProperty(1.0f);
   ObjectProperty<Float> objectProperty = new SimpleObjectProperty<>(2.0f);
   BooleanBinding binding = floatProperty.greaterThan(FloatExpression.floatExpression(objectProperty));

Note: null values will be interpreted as 0f

Type Parameters:: T - The type of Number to be wrapped
Parameters:: value - The source ObservableValue
Returns:: A FloatExpression that wraps the ObservableValue if necessary
Throws:: NullPointerException - if value is null
Since:: JavaFX 8.0