This package provides a preferences mechanism, that is, a means of writing
      configuration data (key/value pairs) to a persistent data store and
      retrieving it from there.
  more...
   
  
    Interfaces
    
  
  
    Classes
    
    
  
        
              | AbstractPreferences | 
              This abstract class is a partial implementation of the abstract class
 Preferences, which can be used to simplify Preferences provider's
 implementation.  | 
          
        
              | NodeChangeEvent | 
              This is the event class to indicate that one child of the preference node has
 been added or deleted.  | 
          
        
              | PreferenceChangeEvent | 
              This is the event class to indicate that a preference has been added, deleted
 or updated.  | 
          
        
              | Preferences | 
              An instance of the class Preferences represents one node in a preference tree,
 which provides a mechanism to store and access configuration data in a
 hierarchical way.  | 
          
  
     
  
  
  
    Exceptions
    
    
  
        
              | BackingStoreException | 
              An exception to indicate that an error was encountered while accessing the
 backing store.  | 
          
        
              | InvalidPreferencesFormatException | 
              An exception to indicate that the input XML file is not well-formed or could
 not be validated against the appropriate document type (specified by
 in the Preferences).  |