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Added in API level 1

Summary: Inherited Fields | Ctors | Methods | Inherited Methods

NodeChangeEvent

public class NodeChangeEvent
extends EventObject

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

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.

See also:

Summary

Inherited fields

From class java.util.EventObject


    protected
    
    
    Object

source

The object on which the Event initially occurred.

Public constructors
`NodeChangeEvent(Preferences parent, Preferences child)` Constructs a new `NodeChangeEvent` instance.

Public methods
`Preferences`	`getChild()` Returns the node that was added or removed.
`Preferences`	`getParent()` Returns the parent of the node that was added or removed.

Inherited methods

From class


        
          java.util.EventObject

`Object`	`getSource()` The object on which the Event initially occurred.
`String`	`toString()` Returns a String representation of this EventObject.

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Public constructors

NodeChangeEvent

Added in API level 1

public NodeChangeEvent (Preferences parent, 
                Preferences child)

Constructs a new NodeChangeEvent instance.

Parameters
`parent`	`Preferences`: The parent of the node that was added or removed.
`child`	`Preferences`: The node that was added or removed.

Public methods

getChild

Added in API level 1

public Preferences getChild ()

Returns the node that was added or removed.

Returns
`Preferences`	The node that was added or removed.

getParent

Added in API level 1

public Preferences getParent ()

Returns the parent of the node that was added or removed.

Returns
`Preferences`	The parent Preferences node whose child was added or removed

Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.

Last updated 2026-08-03 UTC.

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