- Type Parameters:
T- The type of the observed value
public final class WeakChangeListener<T> extends Object implements ChangeListener<T>, WeakListenerA
WeakChangeListenercan be used if an
ObservableValueshould only maintain a weak reference to the listener. This helps to avoid memory leaks which can occur if observers are not unregistered from observed objects after use.
WeakChangeListenerinstances are created by passing in the original
WeakChangeListenershould then be registered to listen for changes of the observed object.
Note: You have to keep a reference to the
ChangeListenerthat was passed in for as long as it is in use, otherwise it will be garbage collected too soon.