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package java.util.prefs;
import java.util.*;
/**
* A factory object that generates Preferences objects. Providers of
* new {@link Preferences} implementations should provide corresponding
* {@code PreferencesFactory} implementations so that the new
* {@code Preferences} implementation can be installed in place of the
* platform-specific default implementation.
*
* <p><strong>This class is for {@code Preferences} implementers only.
* Normal users of the {@code Preferences} facility should have no need to
* consult this documentation.</strong>
*
* @author Josh Bloch
* @see Preferences
* @since 1.4
*/
public interface PreferencesFactory {
/**
* Returns the system root preference node. (Multiple calls on this
* method will return the same object reference.)
* @return the system root preference node
*/
Preferences systemRoot();
/**
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