Class PreferenceChangeEvent

java.lang.Object

java.util.EventObject

java.util.prefs.PreferenceChangeEvent

All Implemented Interfaces:

Serializable

public class PreferenceChangeEvent
extends EventObject

An event emitted by a Preferences node to indicate that a preference has been added, removed or has had its value changed.

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

Since:

1.4

See Also:

• Preferences
• PreferenceChangeListener
• NodeChangeEvent

Field Summary

Fields declared in class EventObject

source

Modifier and Type	Field	Description
protected Object	source	The object on which the Event initially occurred.

Constructor Summary

Constructors

Constructor	Description
PreferenceChangeEvent(Preferences node, String key, String newValue)	Constructs a new PreferenceChangeEvent instance.

Method Summary

Modifier and Type	Method	Description
String	getKey()	Returns the key of the preference that was changed.
String	getNewValue()	Returns the new value for the preference.
Preferences	getNode()	Returns the preference node that emitted the event.

Methods declared in class EventObject

getSource, toString

Modifier and Type	Method	Description
Object	getSource()	The object on which the Event initially occurred.
String	toString()	Returns a String representation of this EventObject.

Methods declared in class Object

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

Modifier and Type	Method	Description
protected Object	clone()	Creates and returns a copy of this object.
boolean	equals(Object obj)	Indicates whether some other object is "equal to" this one.
protected void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
final Class<?>	getClass()	Returns the runtime class of this Object.
int	hashCode()	Returns a hash code value for this 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.
final void	wait()	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
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(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.

Constructor Details

PreferenceChangeEvent

public PreferenceChangeEvent(Preferences node,
 String key,
 String newValue)

Constructs a new PreferenceChangeEvent instance.

Parameters:

node - The Preferences node that emitted the event.

key - The key of the preference that was changed.

newValue - The new value of the preference, or null if the preference is being removed.

Method Details

getNode

public Preferences getNode()

Returns the preference node that emitted the event.

Returns:

The preference node that emitted the event.

getKey

public String getKey()

Returns the key of the preference that was changed.

Returns:

The key of the preference that was changed.

getNewValue

public String getNewValue()

Returns the new value for the preference.

Returns:

The new value for the preference, or null if the preference was removed.