WeakListener (JavaFX 13)

All Known Implementing Classes:

WeakChangeListener, WeakInvalidationListener, WeakListChangeListener, WeakMapChangeListener, WeakSetChangeListener
```
public interface WeakListener
```
WeakListener is the super interface of all weak listener implementations in the JavaFX API. Usually it should not be used directly, but instead one of the sub-interfaces will be used.

Since:

JavaFX 2.1

See Also:

WeakInvalidationListener, WeakChangeListener

- Method Summary
  
  Modifier and Type Method Description
  
  boolean wasGarbageCollected()
  Returns true if the linked listener was garbage-collected.

- Method Detail
  - wasGarbageCollected
```
boolean wasGarbageCollected()
```
    Returns true if the linked listener was garbage-collected. In this case, the listener can be removed from the observable.
    
    Returns:
    
    true if the linked listener was garbage-collected.