This interface defines the method that an object must implement if it wants to be notified when a preference key/value pair is added to, removed from, or changed in a Preferences object. After any such change, the Preferences object passes a PreferenceChangeEvent object describing the change to the preferenceChange( ) method of any PreferenceChangeListener objects that have been registered through the Preferences.addPreferenceChangeListener( ) method.

Figure 16-130. java.util.prefs.PreferenceChangeListener

public interface PreferenceChangeListener extends java.util.EventListener {
// Public Instance Methods
     void preferenceChange(PreferenceChangeEvent evt);  
}

Passed To

AbstractPreferences.{addPreferenceChangeListener( ), removePreferenceChangeListener( )}, Preferences.{addPreferenceChangeListener( ), removePreferenceChangeListener( )}