Java in a Nutshell, 5th Edition [Electronic resources] نسخه متنی

A
PreferenceChangeEvent object is passed to the
preferenceChange( ) method of any
PreferenceChangeListener objects registered on a
Preferences object whenever a preferences value is
added to, removed from, or modified in that
Preferences node. getNode( )
returns the affected Preferences object.
getKey( ) returns name of the modified preference.
If the preference value was added or modified, getNewValue(
) returns that value. If a preference was deleted,
getNewValue( ) returns null.

Although this class inherits the Serializable
interface, it is not actually serializable.

Figure 16-129. java.util.prefs.PreferenceChangeEvent

public class

PreferenceChangeEvent extends java.util.EventObject {
// Public Constructors
public

PreferenceChangeEvent (Preferences

node , String

key , String

newValue );
// Public Instance Methods
public String

getKey ( );
public String

getNewValue ( );
public Preferences

getNode ( );
}

Passed To

PreferenceChangeListener.preferenceChange( )