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javafx.beans.binding

Class DoubleExpression

java.lang.Object
  • javafx.beans.binding.NumberExpressionBase
    • javafx.beans.binding.DoubleExpression

All Implemented Interfaces:

NumberExpression, Observable, ObservableDoubleValue, ObservableNumberValue, ObservableValue<Number>

Direct Known Subclasses:

DoubleBinding, ReadOnlyDoubleProperty



public abstract class DoubleExpression
extends NumberExpressionBase
implements ObservableDoubleValue
A DoubleExpression is a ObservableDoubleValue plus additional convenience methods to generate bindings in a fluent style.

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

Since:

JavaFX 2.0

  • Constructor Summary

    Constructors
    Constructor and Description
    DoubleExpression()
  • Method Summary

    All MethodsStatic MethodsInstance MethodsConcrete Methods
    Modifier and Type Method and Description
    DoubleBinding add(double other)
    Creates a new NumberBinding that calculates the sum of this NumberExpression and a constant value.
    DoubleBinding add(float other)
    Creates a new NumberBinding that calculates the sum of this NumberExpression and a constant value.
    DoubleBinding add(int other)
    Creates a new NumberBinding that calculates the sum of this NumberExpression and a constant value.
    DoubleBinding add(long other)
    Creates a new NumberBinding that calculates the sum of this NumberExpression and a constant value.
    DoubleBinding add(ObservableNumberValue other)
    Creates a new NumberBinding that calculates the sum of this NumberExpression and another ObservableNumberValue.
    ObjectExpression<Double> asObject()
    Creates an ObjectExpression that holds the value of this DoubleExpression.
    DoubleBinding divide(double other)
    Creates a new NumberBinding that calculates the division of this NumberExpression and a constant value.
    DoubleBinding divide(float other)
    Creates a new NumberBinding that calculates the division of this NumberExpression and a constant value.
    DoubleBinding divide(int other)
    Creates a new NumberBinding that calculates the division of this NumberExpression and a constant value.
    DoubleBinding divide(long other)
    Creates a new NumberBinding that calculates the division of this NumberExpression and a constant value.
    DoubleBinding divide(ObservableNumberValue other)
    Creates a new NumberBinding that calculates the division of this NumberExpression and another ObservableNumberValue.
    static DoubleExpression doubleExpression(ObservableDoubleValue value)
    Returns a DoubleExpression that wraps a ObservableDoubleValue.
    static <T extends Number>
    DoubleExpression
    doubleExpression(ObservableValue<T> value)
    Returns a DoubleExpression that wraps an ObservableValue.
    double doubleValue()
    Returns the value of this ObservableNumberValue as a double.
    float floatValue()
    Returns the value of this ObservableNumberValue as a float.
    Double getValue()
    Returns the current value of this ObservableValue
    int intValue()
    Returns the value of this ObservableNumberValue as an int .
    long longValue()
    Returns the value of this ObservableNumberValue as a long .
    DoubleBinding multiply(double other)
    Creates a new NumberBinding that calculates the product of this NumberExpression and a constant value.
    DoubleBinding multiply(float other)
    Creates a new NumberBinding that calculates the product of this NumberExpression and a constant value.
    DoubleBinding multiply(int other)
    Creates a new NumberBinding that calculates the product of this NumberExpression and a constant value.
    DoubleBinding multiply(long other)
    Creates a new NumberBinding that calculates the product of this NumberExpression and a constant value.
    DoubleBinding multiply(ObservableNumberValue other)
    Creates a new NumberBinding that calculates the product of this NumberExpression and another ObservableNumberValue.
    DoubleBinding 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.
    DoubleBinding subtract(float other)
    Creates a new NumberBinding that calculates the difference of this NumberExpression and a constant value.
    DoubleBinding subtract(int other)
    Creates a new NumberBinding that calculates the difference of this NumberExpression and a constant value.
    DoubleBinding subtract(long other)
    Creates a new NumberBinding that calculates the difference of this NumberExpression and a constant value.
    DoubleBinding subtract(ObservableNumberValue other)
    Creates a new NumberBinding that calculates the difference of this NumberExpression and another ObservableNumberValue.
    • Methods inherited from 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 inherited from class java.lang.Object

      clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Methods inherited from interface javafx.beans.value.ObservableDoubleValue

      get
    • Methods inherited from interface javafx.beans.value.ObservableValue

      addListener, removeListener
    • Methods inherited from interface javafx.beans.Observable

      addListener, removeListener
  • Constructor Detail

    • DoubleExpression

      public DoubleExpression()
  • Method Detail

    • intValue

      public int intValue()
      Description copied from interface: ObservableNumberValue
      Returns the value of this ObservableNumberValue as an int . If the value is not an int, a standard cast is performed.

      Specified by:

      intValue in interface ObservableNumberValue

      Returns:

      The value of this ObservableNumberValue as an int

    • longValue

      public long longValue()
      Description copied from interface: ObservableNumberValue
      Returns the value of this ObservableNumberValue as a long . If the value is not a long, a standard cast is performed.

      Specified by:

      longValue in interface ObservableNumberValue

      Returns:

      The value of this ObservableNumberValue as a long

    • floatValue

      public float floatValue()
      Description copied from interface: ObservableNumberValue
      Returns the value of this ObservableNumberValue as a float. If the value is not a float, a standard cast is performed.

      Specified by:

      floatValue in interface ObservableNumberValue

      Returns:

      The value of this ObservableNumberValue as a float

    • doubleValue

      public double doubleValue()
      Description copied from interface: ObservableNumberValue
      Returns the value of this ObservableNumberValue as a double. If the value is not a double, a standard cast is performed.

      Specified by:

      doubleValue in interface ObservableNumberValue

      Returns:

      The value of this ObservableNumberValue as a double

    • getValue

      public Double getValue()
      Description copied from interface: ObservableValue
      Returns the current value of this ObservableValue

      Specified by:

      getValue in interface ObservableValue<Number>

      Returns:

      The current value

    • doubleExpression

      public static DoubleExpression doubleExpression(ObservableDoubleValue value)
      Returns a DoubleExpression that wraps a ObservableDoubleValue. If the ObservableDoubleValue is already a DoubleExpression, it will be returned. Otherwise a new DoubleBinding is created that is bound to the ObservableDoubleValue.

      Parameters:

      value - The source ObservableDoubleValue

      Returns:

      A DoubleExpression that wraps the ObservableDoubleValue if necessary

      Throws:

      NullPointerException - if value is null

    • doubleExpression

      public static <T extends Number> DoubleExpression doubleExpression(ObservableValue<T> value)
      Returns a DoubleExpression that wraps an ObservableValue. If the ObservableValue is already a DoubleExpression, it will be returned. Otherwise a new DoubleBinding 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 DoubleExpression, which is essentially an ObservableValue<Number>. See sample below.

      DoubleProperty doubleProperty = new SimpleDoubleProperty(1.0);
         ObjectProperty<Double> objectProperty = new SimpleObjectProperty<>(2.0);
         BooleanBinding binding = doubleProperty.greaterThan(DoubleExpression.doubleExpression(objectProperty));
      Note: null values will be interpreted as 0.0

      Parameters:

      value - The source ObservableValue

      Returns:

      A DoubleExpression that wraps the ObservableValue if necessary

      Throws:

      NullPointerException - if value is null

      Since:

      JavaFX 8.0

    • negate

      public DoubleBinding negate()
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the negation of NumberExpression.

      Specified by:

      negate in interface NumberExpression

      Returns:

      the new NumberBinding

    • add

      public DoubleBinding add(ObservableNumberValue other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the sum of this NumberExpression and another ObservableNumberValue.

      Specified by:

      add in interface NumberExpression

      Overrides:

      add in class NumberExpressionBase

      Parameters:

      other - the second ObservableNumberValue

      Returns:

      the new NumberBinding

    • add

      public DoubleBinding add(double other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the sum of this NumberExpression and a constant value.

      Specified by:

      add in interface NumberExpression

      Parameters:

      other - the constant value

      Returns:

      the new NumberBinding

    • add

      public DoubleBinding add(float other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the sum of this NumberExpression and a constant value.

      Specified by:

      add in interface NumberExpression

      Parameters:

      other - the constant value

      Returns:

      the new NumberBinding

    • add

      public DoubleBinding add(long other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the sum of this NumberExpression and a constant value.

      Specified by:

      add in interface NumberExpression

      Parameters:

      other - the constant value

      Returns:

      the new NumberBinding

    • add

      public DoubleBinding add(int other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the sum of this NumberExpression and a constant value.

      Specified by:

      add in interface NumberExpression

      Parameters:

      other - the constant value

      Returns:

      the new NumberBinding

    • subtract

      public DoubleBinding subtract(ObservableNumberValue other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the difference of this NumberExpression and another ObservableNumberValue.

      Specified by:

      subtract in interface NumberExpression

      Overrides:

      subtract in class NumberExpressionBase

      Parameters:

      other - the second ObservableNumberValue

      Returns:

      the new NumberBinding

    • subtract

      public DoubleBinding subtract(double other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the difference of this NumberExpression and a constant value.

      Specified by:

      subtract in interface NumberExpression

      Parameters:

      other - the constant value

      Returns:

      the new NumberBinding

    • subtract

      public DoubleBinding subtract(float other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the difference of this NumberExpression and a constant value.

      Specified by:

      subtract in interface NumberExpression

      Parameters:

      other - the constant value

      Returns:

      the new NumberBinding

    • subtract

      public DoubleBinding subtract(long other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the difference of this NumberExpression and a constant value.

      Specified by:

      subtract in interface NumberExpression

      Parameters:

      other - the constant value

      Returns:

      the new NumberBinding

    • subtract

      public DoubleBinding subtract(int other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the difference of this NumberExpression and a constant value.

      Specified by:

      subtract in interface NumberExpression

      Parameters:

      other - the constant value

      Returns:

      the new NumberBinding

    • multiply

      public DoubleBinding multiply(ObservableNumberValue other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the product of this NumberExpression and another ObservableNumberValue.

      Specified by:

      multiply in interface NumberExpression

      Overrides:

      multiply in class NumberExpressionBase

      Parameters:

      other - the second ObservableNumberValue

      Returns:

      the new NumberBinding

    • multiply

      public DoubleBinding multiply(double other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the product of this NumberExpression and a constant value.

      Specified by:

      multiply in interface NumberExpression

      Parameters:

      other - the constant value

      Returns:

      the new NumberBinding

    • multiply

      public DoubleBinding multiply(float other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the product of this NumberExpression and a constant value.

      Specified by:

      multiply in interface NumberExpression

      Parameters:

      other - the constant value

      Returns:

      the new NumberBinding

    • multiply

      public DoubleBinding multiply(long other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the product of this NumberExpression and a constant value.

      Specified by:

      multiply in interface NumberExpression

      Parameters:

      other - the constant value

      Returns:

      the new NumberBinding

    • multiply

      public DoubleBinding multiply(int other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the product of this NumberExpression and a constant value.

      Specified by:

      multiply in interface NumberExpression

      Parameters:

      other - the constant value

      Returns:

      the new NumberBinding

    • divide

      public DoubleBinding divide(ObservableNumberValue other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the division of this NumberExpression and another ObservableNumberValue.

      Specified by:

      divide in interface NumberExpression

      Overrides:

      divide in class NumberExpressionBase

      Parameters:

      other - the second ObservableNumberValue

      Returns:

      the new NumberBinding

    • divide

      public DoubleBinding divide(double other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the division of this NumberExpression and a constant value.

      Specified by:

      divide in interface NumberExpression

      Parameters:

      other - the constant value

      Returns:

      the new NumberBinding

    • divide

      public DoubleBinding divide(float other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the division of this NumberExpression and a constant value.

      Specified by:

      divide in interface NumberExpression

      Parameters:

      other - the constant value

      Returns:

      the new NumberBinding

    • divide

      public DoubleBinding divide(long other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the division of this NumberExpression and a constant value.

      Specified by:

      divide in interface NumberExpression

      Parameters:

      other - the constant value

      Returns:

      the new NumberBinding

    • divide

      public DoubleBinding divide(int other)
      Description copied from interface: NumberExpression
      Creates a new NumberBinding that calculates the division of this NumberExpression and a constant value.

      Specified by:

      divide in interface NumberExpression

      Parameters:

      other - the constant value

      Returns:

      the new NumberBinding

    • asObject

      public ObjectExpression<Double> asObject()
      Creates an ObjectExpression that holds the value of this DoubleExpression. If the value of this DoubleExpression changes, the value of the ObjectExpression will be updated automatically.

      Returns:

      the new ObjectExpression

      Since:

      JavaFX 8.0

© 2008, 2025, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from JavaFX API Documentation.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Java, JavaFX and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.

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