UnknownUserException (Java Platform SE 8 )
Keywords: org.omg.CORBA.UnknownUserException class
Date: 2026-03-29

org.omg.CORBA

## Class UnknownUserException

- java.lang.Object
- - java.lang.Throwable
  - - java.lang.Exception
    - - org.omg.CORBA.UserException
      - - org.omg.CORBA.UnknownUserException

- All Implemented Interfaces:
    Serializable, IDLEntity

      public final class UnknownUserException
      extends UserException

  A class that contains user exceptions returned by the server. When the client uses the DII to make an invocation, any user exception returned from the server is enclosed in an `Any` object contained in the `UnknownUserException` object. This is available from the `Environment` object returned by the method `Request.env`.
  See Also:
    documentation on Java IDL exceptions, `Request`

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `Any` | `except` The `Any` instance that contains the actual user exception thrown by the server.

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `UnknownUserException()` Constructs an `UnknownUserException` object.
    `UnknownUserException(Any a)` Constructs an `UnknownUserException` object that contains the given `Any` object.

  - ### Method Summary

    - ### Methods inherited from class java.lang.Throwable

      `addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### Field Detail

    - #### except

          public Any except

      The `Any` instance that contains the actual user exception thrown by the server.

  - ### Constructor Detail

    - #### UnknownUserException

          public UnknownUserException()

      Constructs an `UnknownUserException` object.

    - #### UnknownUserException

          public UnknownUserException(Any a)

      Constructs an `UnknownUserException` object that contains the given `Any` object.
      Parameters:
        `a` - an `Any` object that contains a user exception returned by the server

Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2026, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.