Java in a Nutshell, 5th Edition

Name

AbstractPreferences

Synopsis

This class implements all the abstract methods of Preferences on top of a smaller set of abstract methods. Programmers creating a Preferences implementation (or “service provider”) can subclass this class and need define only the nine methods whose names end in “Spi”. Application programmers never need to use this class.

Figure 16-124. java.util.prefs.AbstractPreferences

public abstract class AbstractPreferences extends Preferences {
// Protected Constructors
     protected AbstractPreferences(AbstractPreferences parent, String name);  
// Event Registration Methods (by event name)
     public void addNodeChangeListener(NodeChangeListener ncl);        
        Overrides:Preferences
     public void removeNodeChangeListener(NodeChangeListener ncl);     
        Overrides:Preferences
     public void addPreferenceChangeListener(PreferenceChangeListener pcl);    
        Overrides:Preferences
     public void removePreferenceChangeListener(PreferenceChangeListener pcl);    
        Overrides:Preferences
// Public Methods Overriding Preferences
     public String absolutePath( );  
     public String[ ] childrenNames( ) throws BackingStoreException;  
     public void clear( ) throws BackingStoreException;  
     public void exportNode(java.io.OutputStream os) throws java.io.IOException, 
        BackingStoreException;  
     public void exportSubtree(java.io.OutputStream os) throws java.io.IOException, 
        BackingStoreException;  
     public void flush( ) throws BackingStoreException; ...