SetExpression

java.lang.Object
- javafx.beans.binding.SetExpression<E>

Type Parameters:

E - the type of the Set elements

All Implemented Interfaces:

Iterable<E>, Collection<E>, Set<E>, Observable, ObservableObjectValue<ObservableSet<E>>, ObservableSetValue<E>, ObservableValue<ObservableSet<E>>, ObservableSet<E>

Direct Known Subclasses:

ReadOnlySetProperty, SetBinding
```
public abstract class SetExpression<E>
extends Object
implements ObservableSetValue<E>
```
SetExpression is an ObservableSetValue plus additional convenience methods to generate bindings in a fluent style.
A concrete sub-class of SetExpression has to implement the method ObservableObjectValue.get(), which provides the actual value of this expression.

If the wrapped list of a SetExpression is null, all methods implementing the Set interface will behave as if they were applied to an immutable empty set.

Since:

JavaFX 2.1

Property Summary

Properties
Type	Property	Description
`abstract ReadOnlyBooleanProperty`	`empty`	A boolean property that is `true`, if the set is empty.
`abstract ReadOnlyIntegerProperty`	`size`	An integer property that represents the size of the set.

Constructor Summary

Constructors
Constructor Description

SetExpression()

Constructors
Constructor	Description
`SetExpression()`

Method Summary

All MethodsStatic MethodsInstance MethodsAbstract MethodsConcrete Methods
Modifier and Type	Method	Description
`boolean`	`add(E element)`
`boolean`	`addAll(Collection<? extends E> elements)`
`StringBinding`	`asString()`	Creates a `StringBinding` that holds the value of the `SetExpression` turned into a `String`.
`void`	`clear()`
`boolean`	`contains(Object obj)`
`boolean`	`containsAll(Collection<?> objects)`
`abstract ReadOnlyBooleanProperty`	`emptyProperty()`	A boolean property that is `true`, if the set is empty.
`int`	`getSize()`	The size of the set
`ObservableSet<E>`	`getValue()`	Returns the current value of this `ObservableValue`
`boolean`	`isEmpty()`	Gets the value of the property empty.
`BooleanBinding`	`isEqualTo(ObservableSet<?> other)`	Creates a new `BooleanBinding` that holds `true` if this set is equal to another `ObservableSet`.
`BooleanBinding`	`isNotEqualTo(ObservableSet<?> other)`	Creates a new `BooleanBinding` that holds `true` if this set is not equal to another `ObservableSet`.
`BooleanBinding`	`isNotNull()`	Creates a new `BooleanBinding` that holds `true` if the wrapped set is not `null`.
`BooleanBinding`	`isNull()`	Creates a new `BooleanBinding` that holds `true` if the wrapped set is `null`.
`Iterator<E>`	`iterator()`
`boolean`	`remove(Object obj)`
`boolean`	`removeAll(Collection<?> objects)`
`boolean`	`retainAll(Collection<?> objects)`
`static <E> SetExpression<E>`	`setExpression(ObservableSetValue<E> value)`	Returns a `SetExpression` that wraps a `ObservableSetValue`.
`int`	`size()`
`abstract ReadOnlyIntegerProperty`	`sizeProperty()`	An integer property that represents the size of the set.
`Object[]`	`toArray()`
`<T> T[]`	`toArray(T[] array)`

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

Methods inherited from interface java.util.Collection
parallelStream, removeIf, stream, toArray

Methods inherited from interface java.lang.Iterable
forEach

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

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

Methods inherited from interface javafx.collections.ObservableSet
addListener, removeListener

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

Methods inherited from interface java.util.Set
equals, hashCode, spliterator

Property Detail
- size
```
public abstract ReadOnlyIntegerProperty sizeProperty
```
  An integer property that represents the size of the set.
  
  See Also:
  
  getSize()
- empty
```
public abstract ReadOnlyBooleanProperty emptyProperty
```
  A boolean property that is true, if the set is empty.
  
  See Also:
  
  isEmpty()

Constructor Detail
- SetExpression
```
public SetExpression()
```

Method Detail
- getValue
```
public ObservableSet<E> getValue()
```
  Description copied from interface: ObservableValue
  
  Returns the current value of this ObservableValue
  
  Specified by:
  
  getValue in interface ObservableValue<E>
  
  Returns:
  
  The current value
- setExpression
```
public static <E> SetExpression<E> setExpression(ObservableSetValue<E> value)
```
  Returns a SetExpression that wraps a ObservableSetValue. If the ObservableSetValue is already a SetExpression, it will be returned. Otherwise a new SetBinding is created that is bound to the ObservableSetValue.
  
  Type Parameters:
  
  E - the type of the Set elements
  
  Parameters:
  
  value - The source ObservableSetValue
  
  Returns:
  
  A SetExpression that wraps the ObservableSetValue if necessary
  
  Throws:
  
  NullPointerException - if value is null
- getSize
```
public int getSize()
```
  The size of the set
  
  Returns:
  
  the size
- sizeProperty
```
public abstract ReadOnlyIntegerProperty sizeProperty()
```
  An integer property that represents the size of the set.
  
  See Also:
  
  getSize()
- emptyProperty
```
public abstract ReadOnlyBooleanProperty emptyProperty()
```
  A boolean property that is true, if the set is empty.
  
  See Also:
  
  isEmpty()
- isEqualTo
```
public BooleanBinding isEqualTo(ObservableSet<?> other)
```
  Creates a new BooleanBinding that holds true if this set is equal to another ObservableSet.
  
  Parameters:
  
  other - the other ObservableSet
  
  Returns:
  
  the new BooleanBinding
  
  Throws:
  
  NullPointerException - if other is null
- isNotEqualTo
```
public BooleanBinding isNotEqualTo(ObservableSet<?> other)
```
  Creates a new BooleanBinding that holds true if this set is not equal to another ObservableSet.
  
  Parameters:
  
  other - the other ObservableSet
  
  Returns:
  
  the new BooleanBinding
  
  Throws:
  
  NullPointerException - if other is null
- isNull
```
public BooleanBinding isNull()
```
  Creates a new BooleanBinding that holds true if the wrapped set is null.
  
  Returns:
  
  the new BooleanBinding
- isNotNull
```
public BooleanBinding isNotNull()
```
  Creates a new BooleanBinding that holds true if the wrapped set is not null.
  
  Returns:
  
  the new BooleanBinding
- asString
```
public StringBinding asString()
```
  Creates a StringBinding that holds the value of the SetExpression turned into a String. If the value of this SetExpression changes, the value of the StringBinding will be updated automatically.
  
  Returns:
  
  the new StringBinding
- size
```
public int size()
```
  Specified by:
  
  size in interface Collection<E>
  
  Specified by:
  
  size in interface Set<E>
- isEmpty
```
public boolean isEmpty()
```
  Gets the value of the property empty.
  
  Specified by:
  
  isEmpty in interface Collection<E>
  
  Specified by:
  
  isEmpty in interface Set<E>
  
  Property description:
  
  A boolean property that is true, if the set is empty.
- contains
```
public boolean contains(Object obj)
```
  Specified by:
  
  contains in interface Collection<E>
  
  Specified by:
  
  contains in interface Set<E>
- iterator
```
public Iterator<E> iterator()
```
  Specified by:
  
  iterator in interface Collection<E>
  
  Specified by:
  
  iterator in interface Iterable<E>
  
  Specified by:
  
  iterator in interface Set<E>
- toArray
```
public Object[] toArray()
```
  Specified by:
  
  toArray in interface Collection<E>
  
  Specified by:
  
  toArray in interface Set<E>
- toArray
```
public <T> T[] toArray(T[] array)
```
  Specified by:
  
  toArray in interface Collection<E>
  
  Specified by:
  
  toArray in interface Set<E>
- add
```
public boolean add(E element)
```
  Specified by:
  
  add in interface Collection<E>
  
  Specified by:
  
  add in interface Set<E>
- remove
```
public boolean remove(Object obj)
```
  Specified by:
  
  remove in interface Collection<E>
  
  Specified by:
  
  remove in interface Set<E>
- containsAll
```
public boolean containsAll(Collection<?> objects)
```
  Specified by:
  
  containsAll in interface Collection<E>
  
  Specified by:
  
  containsAll in interface Set<E>
- addAll
```
public boolean addAll(Collection<? extends E> elements)
```
  Specified by:
  
  addAll in interface Collection<E>
  
  Specified by:
  
  addAll in interface Set<E>
- removeAll
```
public boolean removeAll(Collection<?> objects)
```
  Specified by:
  
  removeAll in interface Collection<E>
  
  Specified by:
  
  removeAll in interface Set<E>
- retainAll
```
public boolean retainAll(Collection<?> objects)
```
  Specified by:
  
  retainAll in interface Collection<E>
  
  Specified by:
  
  retainAll in interface Set<E>
- clear
```
public void clear()
```
  Specified by:
  
  clear in interface Collection<E>
  
  Specified by:
  
  clear in interface Set<E>

© 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.

Class SetExpression<E>

Property Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface java.util.Collection

Methods inherited from interface java.lang.Iterable

Methods inherited from interface javafx.beans.Observable

Methods inherited from interface javafx.beans.value.ObservableObjectValue

Methods inherited from interface javafx.collections.ObservableSet

Methods inherited from interface javafx.beans.value.ObservableValue

Methods inherited from interface java.util.Set

Property Detail

size

empty

Constructor Detail

Method Detail

getValue

setExpression

getSize

sizeProperty

emptyProperty

isEqualTo

isNotEqualTo

isNull

isNotNull

asString

size

isEmpty

contains

iterator

toArray

toArray

add

remove

containsAll

addAll

removeAll

retainAll

clear