BooleanExpression

java.lang.Object
- javafx.beans.binding.BooleanExpression

All Implemented Interfaces:

Observable, ObservableBooleanValue, ObservableValue<Boolean>

Direct Known Subclasses:

BooleanBinding, ReadOnlyBooleanProperty
```
public abstract class BooleanExpression
extends Object
implements ObservableBooleanValue
```
BooleanExpression is an ObservableBooleanValue plus additional convenience methods to generate bindings in a fluent style.
A concrete sub-class of BooleanExpression has to implement the method ObservableBooleanValue.get(), which provides the actual value of this expression.

Since:

JavaFX 2.0

Constructor Summary

Constructors
Constructor Description

BooleanExpression()
Sole constructor

Constructors
Constructor	Description
`BooleanExpression()`	Sole constructor

Method Summary

All MethodsStatic MethodsInstance MethodsConcrete Methods
Modifier and Type	Method	Description
`BooleanBinding`	`and(ObservableBooleanValue other)`	Creates a new `BooleanExpression` that performs the conditional AND-operation on this `BooleanExpression` and a `ObservableBooleanValue`.
`ObjectExpression<Boolean>`	`asObject()`	Creates an `ObjectExpression` that holds the value of this `BooleanExpression`.
`StringBinding`	`asString()`	Creates a `StringBinding` that holds the value of this `BooleanExpression` turned into a `String`.
`static BooleanExpression`	`booleanExpression(ObservableBooleanValue value)`	Returns a `BooleanExpression` that wraps a `ObservableBooleanValue`.
`static BooleanExpression`	`booleanExpression(ObservableValue<Boolean> value)`	Returns a `BooleanExpression` that wraps an `ObservableValue`.
`Boolean`	`getValue()`	Returns the current value of this `ObservableValue`
`BooleanBinding`	`isEqualTo(ObservableBooleanValue other)`	Creates a new `BooleanExpression` that holds `true` if this and another `ObservableBooleanValue` are equal.
`BooleanBinding`	`isNotEqualTo(ObservableBooleanValue other)`	Creates a new `BooleanExpression` that holds `true` if this and another `ObservableBooleanValue` are equal.
`BooleanBinding`	`not()`	Creates a new `BooleanExpression` that calculates the negation of this `BooleanExpression`.
`BooleanBinding`	`or(ObservableBooleanValue other)`	Creates a new `BooleanExpression` that performs the conditional OR-operation on this `BooleanExpression` and a `ObservableBooleanValue`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

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

Methods inherited from interface javafx.beans.value.ObservableBooleanValue
get

Methods inherited from interface javafx.beans.value.ObservableValue
addListener, removeListener

Constructor Detail
- BooleanExpression
```
public BooleanExpression()
```
  Sole constructor

Method Detail
- getValue
```
public Boolean getValue()
```
  Description copied from interface: ObservableValue
  
  Returns the current value of this ObservableValue
  
  Specified by:
  
  getValue in interface ObservableValue<Boolean>
  
  Returns:
  
  The current value
- booleanExpression
```
public static BooleanExpression booleanExpression(ObservableBooleanValue value)
```
  Returns a BooleanExpression that wraps a ObservableBooleanValue. If the ObservableBooleanValue is already a BooleanExpression, it will be returned. Otherwise a new BooleanBinding is created that is bound to the ObservableBooleanValue.
  
  Parameters:
  
  value - The source ObservableBooleanValue
  
  Returns:
  
  A BooleanExpression that wraps the ObservableBooleanValue if necessary
  
  Throws:
  
  NullPointerException - if value is null
- booleanExpression
```
public static BooleanExpression booleanExpression(ObservableValue<Boolean> value)
```
  Returns a BooleanExpression that wraps an ObservableValue. If the ObservableValue is already a BooleanExpression, it will be returned. Otherwise a new BooleanBinding is created that is bound to the ObservableValue. Note: null values will be interpreted as "false".
  
  Parameters:
  
  value - The source ObservableValue
  
  Returns:
  
  A BooleanExpression that wraps the ObservableValue if necessary
  
  Throws:
  
  NullPointerException - if value is null
  
  Since:
  
  JavaFX 8.0
- and
```
public BooleanBinding and(ObservableBooleanValue other)
```
  Creates a new BooleanExpression that performs the conditional AND-operation on this BooleanExpression and a ObservableBooleanValue.
  
  Parameters:
  
  other - the other ObservableBooleanValue
  
  Returns:
  
  the new BooleanExpression
  
  Throws:
  
  NullPointerException - if other is null
- or
```
public BooleanBinding or(ObservableBooleanValue other)
```
  Creates a new BooleanExpression that performs the conditional OR-operation on this BooleanExpression and a ObservableBooleanValue.
  
  Parameters:
  
  other - the other ObservableBooleanValue
  
  Returns:
  
  the new BooleanExpression
  
  Throws:
  
  NullPointerException - if other is null
- not
```
public BooleanBinding not()
```
  Creates a new BooleanExpression that calculates the negation of this BooleanExpression.
  
  Returns:
  
  the new BooleanExpression
- isEqualTo
```
public BooleanBinding isEqualTo(ObservableBooleanValue other)
```
  Creates a new BooleanExpression that holds true if this and another ObservableBooleanValue are equal.
  
  Parameters:
  
  other - the other ObservableBooleanValue
  
  Returns:
  
  the new BooleanExpression
  
  Throws:
  
  NullPointerException - if other is null
- isNotEqualTo
```
public BooleanBinding isNotEqualTo(ObservableBooleanValue other)
```
  Creates a new BooleanExpression that holds true if this and another ObservableBooleanValue are equal.
  
  Parameters:
  
  other - the other ObservableBooleanValue
  
  Returns:
  
  the new BooleanExpression
  
  Throws:
  
  NullPointerException - if other is null
- asString
```
public StringBinding asString()
```
  Creates a StringBinding that holds the value of this BooleanExpression turned into a String. If the value of this BooleanExpression changes, the value of the StringBinding will be updated automatically.
  
  Returns:
  
  the new StringBinding
- asObject
```
public ObjectExpression<Boolean> asObject()
```
  Creates an ObjectExpression that holds the value of this BooleanExpression. If the value of this BooleanExpression changes, the value of the ObjectExpression will be updated automatically.
  
  Returns:
  
  the new ObjectExpression
  
  Since:
  
  JavaFX 8.0

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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.

Class BooleanExpression

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface javafx.beans.Observable

Methods inherited from interface javafx.beans.value.ObservableBooleanValue

Methods inherited from interface javafx.beans.value.ObservableValue

Constructor Detail

Method Detail

getValue

booleanExpression

booleanExpression

and

or

not

isEqualTo

isNotEqualTo

asString

asObject