Packages
com.sun.el  
com.sun.el.lang  
com.sun.el.parser  
com.sun.el.util  
com.sun.java.beans.binding  
com.sun.java.binding  
com.sun.java.swing.binding The classes in this package may be used to configure binding to Swing components.
com.sun.java.util The classes in this package enabling observing changes to collection classes.
javax.beans.binding The classes in this package, and subpackages, provide a way to bind two properties of two objects together.
javax.beans.binding.ext The classes in this package are primarily useful for developers needing to customize beans binding.
javax.el Provides the API for the Unified Expression Language shared by the JSP 2.1 and JSF 1.2 technologies.
javax.swing.binding