javax.activation
Interfaces 
CommandObject
DataContentHandler
DataContentHandlerFactory
DataSource
Classes 
ActivationDataFlavor
CommandInfo
CommandMap
DataHandler
FileDataSource
FileTypeMap
MailcapCommandMap
MimeType
MimeTypeParameterList
MimetypesFileTypeMap
URLDataSource
Exceptions 
MimeTypeParseException
UnsupportedDataTypeException