Package 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.

Since:
1.4
Interface Description
NodeChangeListener

A listener for receiving preference node change events.
PreferenceChangeListener

A listener for receiving preference change events.
PreferencesFactory

A factory object that generates Preferences objects.
Class Description
AbstractPreferences

This class provides a skeletal implementation of the Preferences class, 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.
Exception Description
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 Preferences specification.

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
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https://docs.oracle.com/en/java/javase/11/docs/api/java.prefs/java/util/prefs/package-summary.html