Package java.util.prefs

Class PreferenceChangeEvent

java.lang.Object

java.util.EventObject

java.util.prefs.PreferenceChangeEvent

All Implemented Interfaces:

Serializable

public class PreferenceChangeEvent
extends EventObject
implements Serializable

This is the event class to indicate that a preference has been added, deleted or updated.

Please note that although the class is marked as Serializable by inheritance from EventObject, this type is not intended to be serialized so the serialization methods do nothing but throw a NotSerializableException.

Since:

1.4

See Also:

Preferences, PreferenceChangeListener, Serialized Form

Field Summary

Fields inherited from class java.util.EventObject

source

Constructor Summary

Constructors

Constructor	Description
PreferenceChangeEvent(Preferences p, String k, String v)	Construct a new PreferenceChangeEvent instance.

Method Summary

Modifier and Type	Method	Description
String	getKey()	Gets the key of the changed preference.
String	getNewValue()	Gets the new value of the changed preference or null if the preference has been removed.
Preferences	getNode()	Gets the Preferences instance that fired this event.

Methods inherited from class java.util.EventObject

getSource, toString

Methods inherited from class java.lang.Object

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

Constructor Details

PreferenceChangeEvent

public PreferenceChangeEvent(Preferences p,
String k,
String v)

Construct a new PreferenceChangeEvent instance.

Parameters:

p - the Preferences instance that fired this event; this object is considered as the event's source.

k - the changed preference key.

v - the new value of the changed preference, this value can be null, which means the preference has been removed.

Method Details

getKey

public String getKey()

Gets the key of the changed preference.

Returns:

the changed preference's key.

getNewValue

public String getNewValue()

Gets the new value of the changed preference or null if the preference has been removed.

Returns:

the new value of the changed preference or null if the preference has been removed.

getNode

public Preferences getNode()

Gets the Preferences instance that fired this event.

Returns:

the Preferences instance that fired this event.