Module javafx.base
Package javafx.collections

Class WeakMapChangeListener<K,​V>

java.lang.Object
javafx.collections.WeakMapChangeListener<K,​V>
Type Parameters:
K - the key element type
V - the value element type
All Implemented Interfaces:
WeakListener, MapChangeListener<K,​V>
public final class WeakMapChangeListener<K,​V>
extends Object
implements MapChangeListener<K,​V>, WeakListener
A WeakMapChangeListener can be used, if an ObservableMap should only maintain a weak reference to the listener. This helps to avoid memory leaks, that can occur if observers are not unregistered from observed objects after use.

WeakMapChangeListener are created by passing in the original MapChangeListener. The WeakMapChangeListener should then be registered to listen for changes of the observed object.

Note: You have to keep a reference to the MapChangeListener, that was passed in as long as it is in use, otherwise it will be garbage collected to soon.

Since:
JavaFX 2.1
See Also:
MapChangeListener, ObservableMap, WeakListener

  • Constructor Details

    • WeakMapChangeListener

      public WeakMapChangeListener​(MapChangeListener<K,​V> listener)
      The constructor of WeakMapChangeListener.
      Parameters:
      listener - The original listener that should be notified