Products J2ObjC Reference android.system Exceptions ErrnoException A checked exception thrown when ERROR(/Os) methods fail. 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 March 19, 2019.