ObservableArrayBase

java.lang.Object
- javafx.collections.ObservableArrayBase<T>

Type Parameters:

T - actual array instance type

All Implemented Interfaces:

Observable, ObservableArray<T>
```
public abstract class ObservableArrayBase<T extends ObservableArray<T>>
extends Object
implements ObservableArray<T>
```
Abstract class that serves as a base class for ObservableArray implementations. The base class provides listener handling functionality by implementing addListener and removeListener methods. fireChange(boolean, int, int) method is provided for notifying the listeners.

Since:

JavaFX 8.0

See Also:

ObservableArray, ArrayChangeListener

Constructor Summary

Constructors
Constructor Description

ObservableArrayBase()

Constructors
Constructor	Description
`ObservableArrayBase()`

Method Summary

All MethodsInstance MethodsConcrete Methods
Modifier and Type	Method	Description
`void`	`addListener(InvalidationListener listener)`	Adds an `InvalidationListener` which will be notified whenever the `Observable` becomes invalid.
`void`	`addListener(ArrayChangeListener<T> listener)`	Add a listener to this observable array.
`protected void`	`fireChange(boolean sizeChanged, int from, int to)`	Notifies all listeners of a change
`void`	`removeListener(InvalidationListener listener)`	Removes the given listener from the list of listeners, that are notified whenever the value of the `Observable` becomes invalid.
`void`	`removeListener(ArrayChangeListener<T> listener)`	Tries to remove a listener from this observable array.

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

Methods inherited from interface javafx.collections.ObservableArray
clear, ensureCapacity, resize, size, trimToSize

Constructor Detail
- ObservableArrayBase
```
public ObservableArrayBase()
```

Method Detail
- addListener
```
public final void addListener(InvalidationListener listener)
```
  Description copied from interface: Observable
  
  Adds an InvalidationListener which will be notified whenever the Observable becomes invalid. If the same listener is added more than once, then it will be notified more than once. That is, no check is made to ensure uniqueness.
  Note that the same actual InvalidationListener instance may be safely registered for different Observables.
  
  The Observable stores a strong reference to the listener which will prevent the listener from being garbage collected and may result in a memory leak. It is recommended to either unregister a listener by calling removeListener after use or to use an instance of WeakInvalidationListener avoid this situation.
  
  Specified by:
  
  addListener in interface Observable
  
  Parameters:
  
  listener - The listener to register
  
  See Also:
  
  Observable.removeListener(InvalidationListener)
- removeListener
```
public final void removeListener(InvalidationListener listener)
```
  Description copied from interface: Observable
  
  Removes the given listener from the list of listeners, that are notified whenever the value of the Observable becomes invalid.
  If the given listener has not been previously registered (i.e. it was never added) then this method call is a no-op. If it had been previously added then it will be removed. If it had been added more than once, then only the first occurrence will be removed.
  
  Specified by:
  
  removeListener in interface Observable
  
  Parameters:
  
  listener - The listener to remove
  
  See Also:
  
  Observable.addListener(InvalidationListener)
- addListener
```
public final void addListener(ArrayChangeListener<T> listener)
```
  Description copied from interface: ObservableArray
  
  Add a listener to this observable array.
  
  Specified by:
  
  addListener in interface ObservableArray<T extends ObservableArray<T>>
  
  Parameters:
  
  listener - the listener for listening to the array changes
- removeListener
```
public final void removeListener(ArrayChangeListener<T> listener)
```
  Description copied from interface: ObservableArray
  
  Tries to remove a listener from this observable array. If the listener is not attached to this array, nothing happens.
  
  Specified by:
  
  removeListener in interface ObservableArray<T extends ObservableArray<T>>
  
  Parameters:
  
  listener - a listener to remove
- fireChange
```
protected final void fireChange(boolean sizeChanged,
                                int from,
                                int to)
```
  Notifies all listeners of a change
  
  Parameters:
  
  sizeChanged - indicates size of array changed
  
  from - A beginning (inclusive) of an interval related to the change
  
  to - An end (exclusive) of an interval related to the change.

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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 ObservableArrayBase<T extends ObservableArray<T>>

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface javafx.collections.ObservableArray

Constructor Detail

Method Detail

addListener

removeListener

addListener

removeListener

fireChange