Callback (Java 2 Platform SE v1.4.1_"07")

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JavaTM 2 Platform
Std. Ed. v1.4.1_"07"

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## javax.security.auth.callback
Interface Callback

All Known Implementing Classes:
  ChoiceCallback, ConfirmationCallback, LanguageCallback, NameCallback, PasswordCallback, TextInputCallback, TextOutputCallback

public interface 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.

`Callback` implementations do not retrieve or display the information requested by underlying security services. `Callback` implementations simply provide the means to pass such requests to applications, and for applications, if appropriate, to return requested information back to the underlying security services.

See Also:
  `CallbackHandler`, `ChoiceCallback`, `ConfirmationCallback`, `LanguageCallback`, `NameCallback`, `PasswordCallback`, `TextInputCallback`, `TextOutputCallback`

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JavaTM 2 Platform
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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.