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java.util.prefs
  This package allows applications to store and retrieve user and system
 preference and configuration data. This data is stored persistently in an
 implementation-dependent backing store. There are two separate trees of
 preference nodes, one for user preferences and one for system preferences.
  
  
    
Interfaces
    
  
  
  
  
    Classes
    
  
  
    
      
        | AbstractPreferences | This class provides a skeletal implementation of the Preferencesclass, greatly easing the task of implementing it. | 
      
    
      
        | NodeChangeEvent | An event emitted by a Preferences node to indicate that
 a child of that node has been added or removed. | 
      
    
      
        | PreferenceChangeEvent | An event emitted by a Preferences node to indicate that
 a preference has been added, removed or has had its value changed. | 
      
    
      
        | Preferences | A node in a hierarchical collection of preference data. | 
      
    
  
  
  
  
    Exceptions
    
  
  
    
      
        | BackingStoreException | Thrown to indicate that a preferences operation could not complete because
 of a failure in the backing store, or a failure to contact the backing
 store. | 
      
    
      
        | InvalidPreferencesFormatException | Thrown to indicate that an operation could not complete because
 the input did not conform to the appropriate XML document type
 for a collection of preferences, as per the Preferencesspecification. | 
      
    
  
  
  
 
  
  
    
    
    - Interfaces
- Classes
- Exceptions
 
 
  
  
    
  
 
  
    
      
      
    
    
      
    
    
  
       
    
    
      
    
  
  
  Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
  Last updated 2025-02-10 UTC.
  
  
  
    
      [[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-02-10 UTC."],[],[]]