Module javafx.base
Package javafx.beans.value

## Interface ObservableNumberValue

- All Superinterfaces:
    `Observable`, `ObservableValue<Number>`
  All Known Subinterfaces:
    `NumberBinding`, `NumberExpression`, `ObservableDoubleValue`, `ObservableFloatValue`, `ObservableIntegerValue`, `ObservableLongValue`
  All Known Implementing Classes:
    `DoubleBinding`, `DoubleExpression`, `DoubleProperty`, `DoublePropertyBase`, `FloatBinding`, `FloatExpression`, `FloatProperty`, `FloatPropertyBase`, `IntegerBinding`, `IntegerExpression`, `IntegerProperty`, `IntegerPropertyBase`, `JavaBeanDoubleProperty`, `JavaBeanFloatProperty`, `JavaBeanIntegerProperty`, `JavaBeanLongProperty`, `LongBinding`, `LongExpression`, `LongProperty`, `LongPropertyBase`, `NumberExpressionBase`, `ReadOnlyDoubleProperty`, `ReadOnlyDoublePropertyBase`, `ReadOnlyDoubleWrapper`, `ReadOnlyFloatProperty`, `ReadOnlyFloatPropertyBase`, `ReadOnlyFloatWrapper`, `ReadOnlyIntegerProperty`, `ReadOnlyIntegerPropertyBase`, `ReadOnlyIntegerWrapper`, `ReadOnlyJavaBeanDoubleProperty`, `ReadOnlyJavaBeanFloatProperty`, `ReadOnlyJavaBeanIntegerProperty`, `ReadOnlyJavaBeanLongProperty`, `ReadOnlyLongProperty`, `ReadOnlyLongPropertyBase`, `ReadOnlyLongWrapper`, `SimpleDoubleProperty`, `SimpleFloatProperty`, `SimpleIntegerProperty`, `SimpleLongProperty`, `SimpleStyleableDoubleProperty`, `SimpleStyleableFloatProperty`, `SimpleStyleableIntegerProperty`, `SimpleStyleableLongProperty`, `StyleableDoubleProperty`, `StyleableFloatProperty`, `StyleableIntegerProperty`, `StyleableLongProperty`

      public interface ObservableNumberValue
      extends ObservableValue<Number>

  A common interface of all sub-interfaces of `ObservableValue` that wrap a number.
  Since:
    JavaFX 2.0
  See Also:
    `ObservableValue`, `ObservableDoubleValue`, `ObservableFloatValue`, `ObservableIntegerValue`, `ObservableLongValue`

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `double` | `doubleValue()` | Returns the value of this `ObservableNumberValue` as a `double`.
    `float` | `floatValue()` | Returns the value of this `ObservableNumberValue` as a `float`.
    `int` | `intValue()` | Returns the value of this `ObservableNumberValue` as an `int` .
    `long` | `longValue()` | Returns the value of this `ObservableNumberValue` as a `long` .

    - ### Methods inherited from interface javafx.beans.Observable

      `addListener, removeListener`

    - ### Methods inherited from interface javafx.beans.value.ObservableValue

      `addListener, getValue, removeListener`

- - ### Method Detail

    - #### intValue

          int intValue()

      Returns the value of this `ObservableNumberValue` as an `int` . If the value is not an `int`, a standard cast is performed.
      Returns:
        The value of this `ObservableNumberValue` as an `int`

    - #### longValue

          long longValue()

      Returns the value of this `ObservableNumberValue` as a `long` . If the value is not a `long`, a standard cast is performed.
      Returns:
        The value of this `ObservableNumberValue` as a `long`

    - #### floatValue

          float floatValue()

      Returns the value of this `ObservableNumberValue` as a `float`. If the value is not a `float`, a standard cast is performed.
      Returns:
        The value of this `ObservableNumberValue` as a `float`

    - #### doubleValue

          double doubleValue()

      Returns the value of this `ObservableNumberValue` as a `double`. If the value is not a `double`, a standard cast is performed.
      Returns:
        The value of this `ObservableNumberValue` as a `double`