Module javafx.base
Package javafx.beans.binding

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 Details

    • FloatExpression

      public FloatExpression()
      Creates a default FloatExpression.

  • Method Details

    • 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 Float getValue()
      Description copied from interface: ObservableValue
      Returns the current value of this ObservableValue
      Specified by:
      getValue in interface ObservableValue<Number>
      Returns:
      The current value

    • 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

    • negate

      public FloatBinding 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(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 FloatBinding 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 FloatBinding 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 FloatBinding 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(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 FloatBinding 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 FloatBinding 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 FloatBinding 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(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 FloatBinding 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 FloatBinding 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 FloatBinding 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(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 FloatBinding 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 FloatBinding 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 FloatBinding 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<Float> asObject()
      Creates an ObjectExpression that holds the value of this FloatExpression. If the value of this FloatExpression changes, the value of the ObjectExpression will be updated automatically.
      Returns:
      the new ObjectExpression
      Since:
      JavaFX 8.0