Packages 
Package Description
org.apache.wicket.util  
org.apache.wicket.util.collections
Useful collections.
org.apache.wicket.util.convert
Conversion support.
org.apache.wicket.util.convert.converter
Default converter implementations.
org.apache.wicket.util.crypt
Encryption support for forms.
org.apache.wicket.util.diff
The diff package implements the differencing engine that JRCS uses.
org.apache.wicket.util.diff.myers
The diff.myers package implements Gene Myers' differencing algorithm.
org.apache.wicket.util.encoding  
org.apache.wicket.util.file
File utilities.
org.apache.wicket.util.io
Input/Output utilities.
org.apache.wicket.util.lang  
org.apache.wicket.util.license  
org.apache.wicket.util.listener
Listener/ Observer utilities.
org.apache.wicket.util.markup.xhtml  
org.apache.wicket.util.parse.metapattern
Regular Expressions meta pattern support.
org.apache.wicket.util.parse.metapattern.parsers
Regular Expressions meta pattern parsers.
org.apache.wicket.util.resource
Base support for resources.
org.apache.wicket.util.string
String utilities.
org.apache.wicket.util.string.interpolator
Support for String-variable interpolation.
org.apache.wicket.util.thread
Threading utilities.
org.apache.wicket.util.time
Utilities for working with Time(s).
org.apache.wicket.util.value
This package provides casting utilities.
org.apache.wicket.util.visit  
org.apache.wicket.util.watch
This package provides modification watchers.
org.apache.wicket.util.xml