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## Uses of Package
javax.security.auth.callback

Packages that use javax.security.auth.callback
javax.security.auth.callback | This package provides the classes necessary for services to interact with applications in order to retrieve information (authentication data including usernames or passwords, for example) or to display information (error and warning messages, for example).

Classes in javax.security.auth.callback used by javax.security.auth.callback
Callback Implementations of this interface are passed to a `CallbackHandler`, allowing underlying security services the ability to interact with a calling application to retrieve specific authentication data such as usernames and passwords, or to display certain information, such as error and warning messages.
UnsupportedCallbackException Signals that a `CallbackHandler` does not recognize a particular `Callback`.

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