Products J2ObjC Reference javax.security.auth Interfaces Destroyable Objects such as credentials may optionally implement this interface to provide the capability to destroy its contents. Exceptions DestroyFailedException Signals that a destroy operation failed. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated May 4, 2017.