javax.activation
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CommandObject
DataContentHandler
DataContentHandlerFactory
DataSource
Ŭ·¡½º 
ActivationDataFlavor
CommandInfo
CommandMap
DataHandler
FileDataSource
FileTypeMap
MailcapCommandMap
MimeType
MimeTypeParameterList
MimetypesFileTypeMap
URLDataSource
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MimeTypeParseException
UnsupportedDataTypeException