ListExpression (JavaFX 8)

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

Type Parameters:

E - the type of the List elements.

All Implemented Interfaces:

java.lang.Iterable<E>, java.util.Collection<E>, java.util.List<E>, Observable, ObservableListValue<E>, ObservableObjectValue<ObservableList<E>>, ObservableValue<ObservableList<E>>, ObservableList<E>

Direct Known Subclasses:

ListBinding, ReadOnlyListProperty
```
public abstract class ListExpression<E>
extends java.lang.Object
implements ObservableListValue<E>
```
A ListExpression is a ObservableListValue plus additional convenience methods to generate bindings in a fluent style.
A concrete sub-class of ListExpression has to implement the method ObservableObjectValue.get(), which provides the actual value of this expression.
If the wrapped list of a ListExpression is null, all methods implementing the List interface will behave as if they were applied to an immutable empty list.

Since:

JavaFX 2.1

Property Summary

All Methods Instance Methods Abstract Methods
Type	Property and Description
`abstract ReadOnlyBooleanProperty`	`empty` A boolean property that is `true`, if the list is empty.
`abstract ReadOnlyIntegerProperty`	`size` An integer property that represents the size of the list.

Constructor Summary

Constructors
Constructor and Description

ListExpression()

Constructors
Constructor and Description
`ListExpression()`

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`add(E element)`
`void`	`add(int i, E element)`
`boolean`	`addAll(java.util.Collection<? extends E> elements)`
`boolean`	`addAll(E... elements)` A convenient method for var-arg adding of elements.
`boolean`	`addAll(int i, java.util.Collection<? extends E> elements)`
`StringBinding`	`asString()` Creates a `StringBinding` that holds the value of the `ListExpression` turned into a `String`.
`void`	`clear()`
`boolean`	`contains(java.lang.Object obj)`
`boolean`	`containsAll(java.util.Collection<?> objects)`
`abstract ReadOnlyBooleanProperty`	`emptyProperty()` A boolean property that is `true`, if the list is empty.
`E`	`get(int i)`
`int`	`getSize()` The size of the list
`ObservableList<E>`	`getValue()` Returns the current value of this `ObservableValue`
`int`	`indexOf(java.lang.Object obj)`
`boolean`	`isEmpty()` Gets the value of the property empty.
`BooleanBinding`	`isEqualTo(ObservableList<?> other)` Creates a new `BooleanBinding` that holds `true` if this list is equal to another `ObservableList`.
`BooleanBinding`	`isNotEqualTo(ObservableList<?> other)` Creates a new `BooleanBinding` that holds `true` if this list is not equal to another `ObservableList`.
`BooleanBinding`	`isNotNull()` Creates a new `BooleanBinding` that holds `true` if the wrapped list is not `null`.
`BooleanBinding`	`isNull()` Creates a new `BooleanBinding` that holds `true` if the wrapped list is `null`.
`java.util.Iterator<E>`	`iterator()`
`int`	`lastIndexOf(java.lang.Object obj)`
`static <E> ListExpression<E>`	`listExpression(ObservableListValue<E> value)` Returns a `ListExpression` that wraps a `ObservableListValue`.
`java.util.ListIterator<E>`	`listIterator()`
`java.util.ListIterator<E>`	`listIterator(int i)`
`E`	`remove(int i)`
`void`	`remove(int from, int to)` Basically a shortcut to sublist(from, to).clear() As this is a common operation, ObservableList has this method for convenient usage.
`boolean`	`remove(java.lang.Object obj)`
`boolean`	`removeAll(java.util.Collection<?> objects)`
`boolean`	`removeAll(E... elements)` A convenient method for var-arg usage of removaAll method.
`boolean`	`retainAll(java.util.Collection<?> objects)`
`boolean`	`retainAll(E... elements)` A convenient method for var-arg usage of retain method.
`E`	`set(int i, E element)`
`boolean`	`setAll(java.util.Collection<? extends E> elements)` Clears the ObservableList and add all elements from the collection.
`boolean`	`setAll(E... elements)` Clears the ObservableList and add all the elements passed as var-args.
`int`	`size()`
`abstract ReadOnlyIntegerProperty`	`sizeProperty()` An integer property that represents the size of the list.
`java.util.List<E>`	`subList(int from, int to)`
`java.lang.Object[]`	`toArray()`
`<T> T[]`	`toArray(T[] array)`
`ObjectBinding<E>`	`valueAt(int index)` Creates a new `ObjectBinding` that contains the element at the specified position.
`ObjectBinding<E>`	`valueAt(ObservableIntegerValue index)` Creates a new `ObjectBinding` that contains the element at the specified position.

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.ObservableObjectValue
get

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

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

Methods inherited from interface javafx.collections.ObservableList
addListener, filtered, removeListener, sorted, sorted

Methods inherited from interface java.util.List
equals, hashCode, replaceAll, sort, spliterator

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

Methods inherited from interface java.lang.Iterable
forEach

- Property Detail
  - size
```
public abstract ReadOnlyIntegerProperty sizeProperty
```
    An integer property that represents the size of the list.
    
    See Also:
    
    getSize()
  - empty
```
public abstract ReadOnlyBooleanProperty emptyProperty
```
    A boolean property that is true, if the list is empty.
    
    See Also:
    
    isEmpty()
- Constructor Detail
  - ListExpression
```
public ListExpression()
```
- Method Detail
  - getValue
```
public ObservableList<E> getValue()
```
    Description copied from interface: ObservableValue
    
    Returns the current value of this ObservableValue
    
    Specified by:
    
    getValue in interface ObservableValue<ObservableList<E>>
    
    Returns:
    
    The current value
  - listExpression
```
public static <E> ListExpression<E> listExpression(ObservableListValue<E> value)
```
    Returns a ListExpression that wraps a ObservableListValue. If the ObservableListValue is already a ListExpression, it will be returned. Otherwise a new ListBinding is created that is bound to the ObservableListValue.
    
    Parameters:
    
    value - The source ObservableListValue
    
    Returns:
    
    A ListExpression that wraps the ObservableListValue if necessary
    
    Throws:
    
    java.lang.NullPointerException - if value is null
  - getSize
```
public int getSize()
```
    The size of the list
  - sizeProperty
```
public abstract ReadOnlyIntegerProperty sizeProperty()
```
    An integer property that represents the size of the list.
    
    See Also:
    
    getSize()
  - emptyProperty
```
public abstract ReadOnlyBooleanProperty emptyProperty()
```
    A boolean property that is true, if the list is empty.
    
    See Also:
    
    isEmpty()
  - valueAt
```
public ObjectBinding<E> valueAt(int index)
```
    Creates a new ObjectBinding that contains the element at the specified position. If index points behind the list, the ObjectBinding contains null.
    
    Parameters:
    
    index - the index of the element
    
    Returns:
    
    the ObjectBinding
    
    Throws:
    
    java.lang.IllegalArgumentException - if index < 0
  - valueAt
```
public ObjectBinding<E> valueAt(ObservableIntegerValue index)
```
    Creates a new ObjectBinding that contains the element at the specified position. If index points outside of the list, the ObjectBinding contains null.
    
    Parameters:
    
    index - the index of the element
    
    Returns:
    
    the ObjectBinding
    
    Throws:
    
    java.lang.NullPointerException - if index is null
  - isEqualTo
```
public BooleanBinding isEqualTo(ObservableList<?> other)
```
    Creates a new BooleanBinding that holds true if this list is equal to another ObservableList.
    
    Parameters:
    
    other - the other ObservableList
    
    Returns:
    
    the new BooleanBinding
    
    Throws:
    
    java.lang.NullPointerException - if other is null
  - isNotEqualTo
```
public BooleanBinding isNotEqualTo(ObservableList<?> other)
```
    Creates a new BooleanBinding that holds true if this list is not equal to another ObservableList.
    
    Parameters:
    
    other - the other ObservableList
    
    Returns:
    
    the new BooleanBinding
    
    Throws:
    
    java.lang.NullPointerException - if other is null
  - isNull
```
public BooleanBinding isNull()
```
    Creates a new BooleanBinding that holds true if the wrapped list is null.
    
    Returns:
    
    the new BooleanBinding
  - isNotNull
```
public BooleanBinding isNotNull()
```
    Creates a new BooleanBinding that holds true if the wrapped list is not null.
    
    Returns:
    
    the new BooleanBinding
  - asString
```
public StringBinding asString()
```
    Creates a StringBinding that holds the value of the ListExpression turned into a String. If the value of this ListExpression changes, the value of the StringBinding will be updated automatically.
    
    Returns:
    
    the new StringBinding
  - size
```
public int size()
```
    Specified by:
    
    size in interface java.util.Collection<E>
    
    Specified by:
    
    size in interface java.util.List<E>
  - isEmpty
```
public boolean isEmpty()
```
    Gets the value of the property empty.
    
    Specified by:
    
    isEmpty in interface java.util.Collection<E>
    
    Specified by:
    
    isEmpty in interface java.util.List<E>
    
    Property description:
    
    A boolean property that is true, if the list is empty.
  - contains
```
public boolean contains(java.lang.Object obj)
```
    Specified by:
    
    contains in interface java.util.Collection<E>
    
    Specified by:
    
    contains in interface java.util.List<E>
  - iterator
```
public java.util.Iterator<E> iterator()
```
    Specified by:
    
    iterator in interface java.lang.Iterable<E>
    
    Specified by:
    
    iterator in interface java.util.Collection<E>
    
    Specified by:
    
    iterator in interface java.util.List<E>
  - toArray
```
public java.lang.Object[] toArray()
```
    Specified by:
    
    toArray in interface java.util.Collection<E>
    
    Specified by:
    
    toArray in interface java.util.List<E>
  - toArray
```
public <T> T[] toArray(T[] array)
```
    Specified by:
    
    toArray in interface java.util.Collection<E>
    
    Specified by:
    
    toArray in interface java.util.List<E>
  - add
```
public boolean add(E element)
```
    Specified by:
    
    add in interface java.util.Collection<E>
    
    Specified by:
    
    add in interface java.util.List<E>
  - remove
```
public boolean remove(java.lang.Object obj)
```
    Specified by:
    
    remove in interface java.util.Collection<E>
    
    Specified by:
    
    remove in interface java.util.List<E>
  - containsAll
```
public boolean containsAll(java.util.Collection<?> objects)
```
    Specified by:
    
    containsAll in interface java.util.Collection<E>
    
    Specified by:
    
    containsAll in interface java.util.List<E>
  - addAll
```
public boolean addAll(java.util.Collection<? extends E> elements)
```
    Specified by:
    
    addAll in interface java.util.Collection<E>
    
    Specified by:
    
    addAll in interface java.util.List<E>
  - addAll
```
public boolean addAll(int i,
                      java.util.Collection<? extends E> elements)
```
    Specified by:
    
    addAll in interface java.util.List<E>
  - removeAll
```
public boolean removeAll(java.util.Collection<?> objects)
```
    Specified by:
    
    removeAll in interface java.util.Collection<E>
    
    Specified by:
    
    removeAll in interface java.util.List<E>
  - retainAll
```
public boolean retainAll(java.util.Collection<?> objects)
```
    Specified by:
    
    retainAll in interface java.util.Collection<E>
    
    Specified by:
    
    retainAll in interface java.util.List<E>
  - clear
```
public void clear()
```
    Specified by:
    
    clear in interface java.util.Collection<E>
    
    Specified by:
    
    clear in interface java.util.List<E>
  - get
```
public E get(int i)
```
    Specified by:
    
    get in interface java.util.List<E>
  - set
```
public E set(int i,
             E element)
```
    Specified by:
    
    set in interface java.util.List<E>
  - add
```
public void add(int i,
                E element)
```
    Specified by:
    
    add in interface java.util.List<E>
  - remove
```
public E remove(int i)
```
    Specified by:
    
    remove in interface java.util.List<E>
  - indexOf
```
public int indexOf(java.lang.Object obj)
```
    Specified by:
    
    indexOf in interface java.util.List<E>
  - lastIndexOf
```
public int lastIndexOf(java.lang.Object obj)
```
    Specified by:
    
    lastIndexOf in interface java.util.List<E>
  - listIterator
```
public java.util.ListIterator<E> listIterator()
```
    Specified by:
    
    listIterator in interface java.util.List<E>
  - listIterator
```
public java.util.ListIterator<E> listIterator(int i)
```
    Specified by:
    
    listIterator in interface java.util.List<E>
  - subList
```
public java.util.List<E> subList(int from,
                                 int to)
```
    Specified by:
    
    subList in interface java.util.List<E>
  - addAll
```
public boolean addAll(E... elements)
```
    Description copied from interface: ObservableList
    
    A convenient method for var-arg adding of elements.
    
    Specified by:
    
    addAll in interface ObservableList<E>
    
    Parameters:
    
    elements - the elements to add
    
    Returns:
    
    true (as specified by Collection.add(E))
  - setAll
```
public boolean setAll(E... elements)
```
    Description copied from interface: ObservableList
    
    Clears the ObservableList and add all the elements passed as var-args.
    
    Specified by:
    
    setAll in interface ObservableList<E>
    
    Parameters:
    
    elements - the elements to set
    
    Returns:
    
    true (as specified by Collection.add(E))
  - setAll
```
public boolean setAll(java.util.Collection<? extends E> elements)
```
    Description copied from interface: ObservableList
    
    Clears the ObservableList and add all elements from the collection.
    
    Specified by:
    
    setAll in interface ObservableList<E>
    
    Parameters:
    
    elements - the collection with elements that will be added to this observableArrayList
    
    Returns:
    
    true (as specified by Collection.add(E))
  - removeAll
```
public boolean removeAll(E... elements)
```
    Description copied from interface: ObservableList
    
    A convenient method for var-arg usage of removaAll method.
    
    Specified by:
    
    removeAll in interface ObservableList<E>
    
    Parameters:
    
    elements - the elements to be removed
    
    Returns:
    
    true if list changed as a result of this call
  - retainAll
```
public boolean retainAll(E... elements)
```
    Description copied from interface: ObservableList
    
    A convenient method for var-arg usage of retain method.
    
    Specified by:
    
    retainAll in interface ObservableList<E>
    
    Parameters:
    
    elements - the elements to be retained
    
    Returns:
    
    true if list changed as a result of this call
  - remove
```
public void remove(int from,
                   int to)
```
    Description copied from interface: ObservableList
    
    Basically a shortcut to sublist(from, to).clear() As this is a common operation, ObservableList has this method for convenient usage.
    
    Specified by:
    
    remove in interface ObservableList<E>
    
    Parameters:
    
    from - the start of the range to remove (inclusive)
    
    to - the end of the range to remove (exclusive)

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Class ListExpression<E>

Property Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface javafx.beans.value.ObservableObjectValue

Methods inherited from interface javafx.beans.value.ObservableValue

Methods inherited from interface javafx.beans.Observable

Methods inherited from interface javafx.collections.ObservableList

Methods inherited from interface java.util.List

Methods inherited from interface java.util.Collection

Methods inherited from interface java.lang.Iterable

Property Detail

size

empty

Constructor Detail

ListExpression

Method Detail

getValue

listExpression

getSize

sizeProperty

emptyProperty

valueAt

valueAt

isEqualTo

isNotEqualTo

isNull

isNotNull

asString

size

isEmpty

contains

iterator

toArray

toArray

add

remove

containsAll

addAll

addAll

removeAll

retainAll

clear

get

set

add

remove

indexOf

lastIndexOf

listIterator

listIterator

subList

addAll

setAll

setAll

removeAll

retainAll

remove