com.liferay.portal.util.comparator
Classes 
ContactLastNameComparator
LayoutComparator
LayoutPriorityComparator
OrganizationNameComparator
PermissionComparator
PortletCategoryComparator
PortletLuceneComparator
PortletRenderWeightComparator
PortletTitleComparator
RecipientComparator
ResourceComparator
UserTrackerModifiedDateComparator