Uses of Interface

Packages that use PortletPreferences
javax.portlet The javax.portlet package defines the API for Java Portlet Specification V2.0. 
javax.portlet.filter The javax.portlet.filter package defines the filter APIs for the Java Portlet Specification. 

Uses of PortletPreferences in javax.portlet

Methods in javax.portlet that return PortletPreferences
 PortletPreferences PortletRequest.getPreferences()
          Returns the preferences object associated with the portlet.

Methods in javax.portlet with parameters of type PortletPreferences
 void PreferencesValidator.validate(PortletPreferences preferences)
          If the preferences values are successfully validated the call to this method must finish gracefully.

Uses of PortletPreferences in javax.portlet.filter

Methods in javax.portlet.filter that return PortletPreferences
 PortletPreferences PortletRequestWrapper.getPreferences()
          The default behavior of this method is to call getPreferences() on the wrapped request object.