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Java > Java SE, EE, ME > java > util > prefs > Preferences

java.util.prefs
Class Preferences

java.lang.Object
  extended by java.util.prefs.Preferences
Direct Known Subclasses:
AbstractPreferences
See Also:
Top Examples, Source Code, system class loader, PreferencesFactory, BackingStoreException 
public abstract String absolutePath()
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[236]Get user and system preferences
By Anonymous on 2003/04/25 14:39:52  Rate
// Get Preferences objects for user and system preferences for the package that contains the TextEditor class. 
 Preferences userprefs = Preferences.userNodeForPackage ( TextEditor.class ) ; 
 Preferences sysprefs = Preferences.systemNodeForPackage ( TextEditor.class ) ; 
  
  
 // Look up a user preference value as an integer. 
 // Note that we always pass a default value 
 int width = userprefs.getInt ( "width", 80 ) ; 
 // Look up a user preference using a system preference as the default 
 String dictionary = userprefs.get ( "dictionary", sysprefs.get ( "dictionary","default_dictionary" )  ) ; 
  
  
  
  
 //absolutePath
public abstract void addNodeChangeListener(NodeChangeListener ncl)
See Also:
addPreferenceChangeListener(PreferenceChangeListener), removeNodeChangeListener(NodeChangeListener), removeNode(), IllegalStateException, NullPointerException
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public abstract void addPreferenceChangeListener(PreferenceChangeListener pcl)
See Also:
addNodeChangeListener(NodeChangeListener), removePreferenceChangeListener(PreferenceChangeListener), removeNode(), IllegalStateException, NullPointerException
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public abstract String[] childrenNames()
                                throws BackingStoreException
See Also:
removeNode(), IllegalStateException
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public abstract void clear()
                    throws BackingStoreException
See Also:
removeNode(), IllegalStateException
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public abstract void exportNode(OutputStream os)
                         throws IOException,
                                BackingStoreException
See Also:
importPreferences(InputStream), removeNode(), IllegalStateException
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public abstract void exportSubtree(OutputStream os)
                            throws IOException,
                                   BackingStoreException
See Also:
exportNode(OutputStream), importPreferences(InputStream), removeNode(), IllegalStateException
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public abstract void flush()
                    throws BackingStoreException
See Also:
sync(), removeNode()
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public abstract String get(String key,
                           String def)
See Also:
NullPointerException, removeNode(), IllegalStateException
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public abstract boolean getBoolean(String key,
                                   boolean def)
See Also:
putBoolean(String,boolean), get(String,String), NullPointerException, removeNode(), IllegalStateException
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public abstract byte[] getByteArray(String key,
                                    byte[] def)
See Also:
putByteArray(String,byte[]), get(String,String), NullPointerException, removeNode(), IllegalStateException
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public abstract double getDouble(String key,
                                 double def)
See Also:
get(String,String), putDouble(String,double), NullPointerException, removeNode(), IllegalStateException, NumberFormatException, Double.parseDouble(String)
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public abstract float getFloat(String key,
                               float def)
See Also:
get(String,String), putFloat(String,float), NullPointerException, removeNode(), IllegalStateException, NumberFormatException, Float.parseFloat(String)
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public abstract int getInt(String key,
                           int def)
See Also:
get(String,String), putInt(String,int), NullPointerException, removeNode(), IllegalStateException, NumberFormatException, Integer.parseInt(String)
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public abstract long getLong(String key,
                             long def)
See Also:
get(String,String), putLong(String,long), NullPointerException, removeNode(), IllegalStateException, NumberFormatException, Long.parseLong(String)
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public static void importPreferences(InputStream is)
                              throws IOException,
                                     InvalidPreferencesFormatException
See Also:
RuntimePermission, SecurityException, put(String, String), node(String), exportSubtree(OutputStream), exportNode(OutputStream)
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public abstract boolean isUserNode()
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public abstract String[] keys()
                       throws BackingStoreException
See Also:
removeNode(), IllegalStateException
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public static final int MAX_KEY_LENGTH
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public static final int MAX_NAME_LENGTH
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public static final int MAX_VALUE_LENGTH
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public abstract String name()
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public abstract Preferences node(String pathName)
See Also:
flush(), removeNode(), IllegalStateException, NullPointerException, IllegalArgumentException
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public abstract boolean nodeExists(String pathName)
                            throws BackingStoreException
See Also:
removeNode(), NullPointerException, IllegalArgumentException
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public abstract Preferences parent()
See Also:
removeNode(), IllegalStateException
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protected Preferences()
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public abstract void put(String key,
                         String value)
See Also:
removeNode(), IllegalStateException, IllegalArgumentException, NullPointerException
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public abstract void putBoolean(String key,
                                boolean value)
See Also:
get(String,String), getBoolean(String,boolean), removeNode(), IllegalStateException, IllegalArgumentException, NullPointerException
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public abstract void putByteArray(String key,
                                  byte[] value)
See Also:
get(String,String), getByteArray(String,byte[]), removeNode(), IllegalStateException, IllegalArgumentException, NullPointerException
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public abstract void putDouble(String key,
                               double value)
See Also:
getDouble(String,double), removeNode(), IllegalStateException, IllegalArgumentException, NullPointerException, Double.toString(double)
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public abstract void putFloat(String key,
                              float value)
See Also:
getFloat(String,float), removeNode(), IllegalStateException, IllegalArgumentException, NullPointerException, Float.toString(float)
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public abstract void putInt(String key,
                            int value)
See Also:
getInt(String,int), removeNode(), IllegalStateException, IllegalArgumentException, NullPointerException, Integer.toString(int)
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public abstract void putLong(String key,
                             long value)
See Also:
getLong(String,long), removeNode(), IllegalStateException, IllegalArgumentException, NullPointerException, Long.toString(long)
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public abstract void remove(String key)
See Also:
removeNode(), IllegalStateException, NullPointerException
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public abstract void removeNode()
                         throws BackingStoreException
See Also:
flush(), UnsupportedOperationException, IllegalStateException, Object, nodeExists(""), isUserNode(), absolutePath(), name()
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public abstract void removeNodeChangeListener(NodeChangeListener ncl)
See Also:
addNodeChangeListener(NodeChangeListener), removeNode(), IllegalStateException, IllegalArgumentException
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public abstract void removePreferenceChangeListener(PreferenceChangeListener pcl)
See Also:
addPreferenceChangeListener(PreferenceChangeListener), removeNode(), IllegalStateException, IllegalArgumentException
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public abstract void sync()
                   throws BackingStoreException
See Also:
flush(), removeNode(), IllegalStateException
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public static Preferences systemNodeForPackage(Class<?> c)
See Also:
RuntimePermission, SecurityException, NullPointerException
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public static Preferences systemRoot()
See Also:
RuntimePermission, SecurityException
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public abstract String toString()
See Also:
Object
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public static Preferences userNodeForPackage(Class<?> c)
See Also:
RuntimePermission, SecurityException, NullPointerException
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public static Preferences userRoot()
See Also:
RuntimePermission, SecurityException
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