NodeChangeEvent (Java SE 23 & JDK 23)
Description: declaration: module: java.prefs, package: java.util.prefs, class: NodeChangeEvent
Keywords: java.util.prefs.NodeChangeEvent class

# Class NodeChangeEvent

java.lang.Object
java.util.EventObject
java.util.prefs.NodeChangeEvent

All Implemented Interfaces:
  `Serializable`

public class NodeChangeEvent extends EventObject
An event emitted by a `Preferences` node to indicate that a child of that node has been added or removed.

Note, that although NodeChangeEvent inherits Serializable interface from java.util.EventObject, it is not intended to be Serializable. Appropriate serialization methods are implemented to throw NotSerializableException.

Since:
  1.4
See Also:
  - `Preferences`
  - `NodeChangeListener`
  - `PreferenceChangeEvent`

- ## Field Summary

  ### Fields declared in class java.util.EventObject

  `source`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `NodeChangeEvent(Preferences parent, Preferences child)`
  Constructs a new `NodeChangeEvent` instance.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `Preferences`
  `getChild()`
  Returns the node that was added or removed.
  `Preferences`
  `getParent()`
  Returns the parent of the node that was added or removed.

  ### Methods declared in class java.util.EventObject

  `getSource, toString`

  ### Methods declared in class java.lang.Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- ## Constructor Details

  - ### NodeChangeEvent

    public NodeChangeEvent(Preferences parent, Preferences child)
    Constructs a new `NodeChangeEvent` instance.
    Parameters:
      `parent` - The parent of the node that was added or removed.
      `child` - The node that was added or removed.

- ## Method Details

  - ### getParent

    public Preferences getParent()
    Returns the parent of the node that was added or removed.
    Returns:
      The parent Preferences node whose child was added or removed

  - ### getChild

    public Preferences getChild()
    Returns the node that was added or removed.
    Returns:
      The node that was added or removed.