Java java.util.prefs Preferences fields, constructors, methods, implement or subclass

Introduction

In this page you can find the methods, fields and constructors for java.util.prefs Preferences.

The text is from its open source code.

Subclass

java.util.prefs.Preferences has subclasses.
Click this link to see all its subclasses.

Field

int	MAX_KEY_LENGTH Maximum length of string allowed as a key (80 characters).
int	MAX_VALUE_LENGTH Maximum length of string allowed as a value (8192 characters).
int	MAX_NAME_LENGTH Maximum length of a node name (80 characters).

Method

String	absolutePath() Returns this preference node's absolute path name.
void	addNodeChangeListener(NodeChangeListener ncl) Registers the specified listener to receive node change events for this node.
void	addPreferenceChangeListener(PreferenceChangeListener pcl) Registers the specified listener to receive preference change events for this preference node.
String[]	childrenNames() Returns the names of the children of this preference node, relative to this node.
void	clear() Removes all of the preferences (key-value associations) in this preference node.
void	exportNode(OutputStream os) Emits on the specified output stream an XML document representing all of the preferences contained in this node (but not its descendants).
void	exportSubtree(OutputStream os) Emits an XML document representing all of the preferences contained in this node and all of its descendants.
void	flush() Forces any changes in the contents of this preference node and its descendants to the persistent store.
String	get(String key, String def) Returns the value associated with the specified key in this preference node.
boolean	getBoolean(String key, boolean def) Returns the boolean value represented by the string associated with the specified key in this preference node.
byte[]	getByteArray(String key, byte[] def) Returns the byte array value represented by the string associated with the specified key in this preference node.
Class	getClass() Returns the runtime class of this Object .
double	getDouble(String key, double def) Returns the double value represented by the string associated with the specified key in this preference node.
float	getFloat(String key, float def) Returns the float value represented by the string associated with the specified key in this preference node.
int	getInt(String key, int def) Returns the int value represented by the string associated with the specified key in this preference node.
long	getLong(String key, long def) Returns the long value represented by the string associated with the specified key in this preference node.
void	importPreferences(InputStream is) Imports all of the preferences represented by the XML document on the specified input stream.
boolean	isUserNode() Returns true if this preference node is in the user preference tree, false if it's in the system preference tree.
String[]	keys() Returns all of the keys that have an associated value in this preference node.
String	name() Returns this preference node's name, relative to its parent.
Preferences	node(String pathName) Returns the named preference node in the same tree as this node, creating it and any of its ancestors if they do not already exist.
boolean	nodeExists(String pathName) Returns true if the named preference node exists in the same tree as this node.
Preferences	parent() Returns the parent of this preference node, or null if this is the root.
void	put(String key, String value) Associates the specified value with the specified key in this preference node.
void	putBoolean(String key, boolean value) Associates a string representing the specified boolean value with the specified key in this preference node.
void	putByteArray(String key, byte[] value) Associates a string representing the specified byte array with the specified key in this preference node.
void	putDouble(String key, double value) Associates a string representing the specified double value with the specified key in this preference node.
void	putFloat(String key, float value) Associates a string representing the specified float value with the specified key in this preference node.
void	putInt(String key, int value) Associates a string representing the specified int value with the specified key in this preference node.
void	putLong(String key, long value) Associates a string representing the specified long value with the specified key in this preference node.
void	remove(String key) Removes the value associated with the specified key in this preference node, if any.
void	removeNode() Removes this preference node and all of its descendants, invalidating any preferences contained in the removed nodes.
void	removePreferenceChangeListener(PreferenceChangeListener pcl) Removes the specified preference change listener, so it no longer receives preference change events.
void	sync() Ensures that future reads from this preference node and its descendants reflect any changes that were committed to the persistent store (from any VM) prior to the sync invocation.
Preferences	systemNodeForPackage(Class c) Returns the preference node from the system preference tree that is associated (by convention) with the specified class's package.
Preferences	systemRoot() Returns the root preference node for the system.
Preferences	userNodeForPackage(Class c) Returns the preference node from the calling user's preference tree that is associated (by convention) with the specified class's package.
Preferences	userRoot() Returns the root preference node for the calling user.