## Uses of Class
java.util.prefs.Preferences

Packages that use Preferences
java.util.prefs: This package allows applications to store and retrieve user and system preference and configuration data.
jdk.jshell.tool: Provides a mechanism to launch an instance of a Java™ shell tool.

### Uses of Preferences in java.util.prefs

Subclasses of Preferences in java.util.prefs
`class` `AbstractPreferences` This class provides a skeletal implementation of the `Preferences` class, greatly easing the task of implementing it.

Methods in java.util.prefs that return Preferences
`Preferences` NodeChangeEvent.`getChild()` Returns the node that was added or removed.
`Preferences` PreferenceChangeEvent.`getNode()` Returns the preference node that emitted the event.
`Preferences` NodeChangeEvent.`getParent()` Returns the parent of the node that was added or removed.
`Preferences` AbstractPreferences.`node​(String path)` Implements the `node` method as per the specification in `node(String)`.
`abstract Preferences` 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.
`Preferences` AbstractPreferences.`parent()` Implements the `parent` method as per the specification in `parent()`.
`abstract Preferences` Preferences.`parent()` Returns the parent of this preference node, or `null` if this is the root.
`static Preferences` Preferences.`systemNodeForPackage​(Class<?> c)` Returns the preference node from the system preference tree that is associated (by convention) with the specified class's package.
`static Preferences` Preferences.`systemRoot()` Returns the root preference node for the system.
`Preferences` PreferencesFactory.`systemRoot()` Returns the system root preference node.
`static Preferences` 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.
`static Preferences` Preferences.`userRoot()` Returns the root preference node for the calling user.
`Preferences` PreferencesFactory.`userRoot()` Returns the user root preference node corresponding to the calling user.

Constructors in java.util.prefs with parameters of type Preferences
`NodeChangeEvent​(Preferences parent, Preferences child)` Constructs a new `NodeChangeEvent` instance.
`PreferenceChangeEvent​(Preferences node, String key, String newValue)` Constructs a new `PreferenceChangeEvent` instance.

### Uses of Preferences in jdk.jshell.tool

Methods in jdk.jshell.tool with parameters of type Preferences
`JavaShellToolBuilder` JavaShellToolBuilder.`persistence​(Preferences prefs)` Set the storage mechanism for persistent information which includes input history and retained settings.