Module javafx.base
Package javafx.collections

Class SetChangeListener.Change<E>

java.lang.Object
javafx.collections.SetChangeListener.Change<E>
Type Parameters:
E - element type
Enclosing interface:
SetChangeListener<E>
public abstract static class SetChangeListener.Change<E>
extends Object
An elementary change done to an ObservableSet. Change contains information about an add or remove operation. Note that adding element that is already in the set does not modify the set and hence no change will be generated.
Since:
JavaFX 2.1

  • Constructor Details

    • Change

      public Change​(ObservableSet<E> set)
      Constructs a change associated with a set.
      Parameters:
      set - the source of the change

  • Method Details

    • getSet

      public ObservableSet<E> getSet()
      An observable set that is associated with the change.
      Returns:
      the source set

    • wasAdded

      public abstract boolean wasAdded()
      If this change is a result of add operation.
      Returns:
      true if a new element was added to the set

    • wasRemoved

      public abstract boolean wasRemoved()
      If this change is a result of removal operation.
      Returns:
      true if an old element was removed from the set

    • getElementAdded

      public abstract E getElementAdded()
      Get the new element. Return null if this is a removal.
      Returns:
      the element that was just added

    • getElementRemoved

      public abstract E getElementRemoved()
      Get the old element. Return null if this is an addition.
      Returns:
      the element that was just removed