Packages 
Package Description
com.sun.java.help.impl
Implementation classes for JavaHelp.
javax.help
Supports presentation of online documentation with both content and contextual views of this information.
javax.help.event
Supports event changes in JavaHelp classes.
javax.help.plaf
Supports access to Component UI classes.
javax.help.plaf.basic  
javax.help.plaf.gtk  
javax.help.resources
Supports localization of JavaHelp.
javax.help.search
Supports simple access to search engines.
javax.help.tagext