What Is activation.jar? I heard it's related to JAF (JavaBeans Activation Framework) 1.1?

The if you have an activation.jar file of 55932 bytes, it is the JAR file of the Sun implementation version 1.1 of the JAF (JavaBeans Activation Framework) 1.1 specification.

JAR File Size and Download Location:

JAR name: activation.jar, activation-1.1.jar
Target JDK version: 1.4
File name: activation.jar
File size: 55932 bytes
Release date: 19-Apr-2006
Download: Oracle JAF Download

Manifest of the JAR:

Implementation-Version: 1.1
Specification-Title: JavaBeans(TM) Activation Framework Specification
Specification-Version: 1.1
Extension-Name: javax.activation
Created-By: 1.4.2 (Sun Microsystems Inc.)
Implementation-Vendor-Id: com.sun
Implementation-Vendor: Sun Microsystems, Inc.
Specification-Vendor: Sun Microsystems, Inc.

List of Classes in the JAR:

javax/activation/ActivationDataFlavor
javax/activation/MimeType
javax/activation/MimeTypeParameterList
javax/activation/MimeTypeParseException
javax/activation/CommandInfo
javax/activation/DataHandler
javax/activation/DataSource
javax/activation/CommandMap
javax/activation/DataContentHandler
javax/activation/DataContentHandlerFactory
javax/activation/CommandObject
javax/activation/DataHandlerDataSource
javax/activation/DataSourceDataContentHandler
javax/activation/ObjectDataContentHandler
javax/activation/FileDataSource
javax/activation/FileTypeMap
javax/activation/MailcapCommandMap
javax/activation/MimetypesFileTypeMap
javax/activation/SecuritySupport
javax/activation/URLDataSource
javax/activation/UnsupportedDataTypeException
com/sun/activation/registries/MailcapFile
com/sun/activation/registries/MailcapParseException
com/sun/activation/registries/MimeTypeFile
com/sun/activation/registries/MimeTypeEntry
com/sun/activation/registries/LineTokenizer
com/sun/activation/registries/LogSupport
com/sun/activation/registries/MailcapTokenizer
com/sun/activation/viewers/ImageViewer
com/sun/activation/viewers/ImageViewerCanvas
com/sun/activation/viewers/TextEditor
com/sun/activation/viewers/TextViewer

⇒ JAF (JavaBeans Activation Framework) API 1.1

⇐ Download and Insatll jaf-1_1_1.zip

⇑ Older Releases of JAF (JavaBeans Activation Framework)

⇑⇑ activation.jar - JAF (JavaBeans Activation Framework)