The problem

Warn on internal, proprietary APIs that may be removed in future JDK versions.

For sun.misc.Unsafe, note that the API will be removed from a future version of the JDK: JEP 471: Deprecate the Memory-Access Methods in sun.misc.Unsafe for Removal.

This check is a re-implementation of javac’s ‘sunapi’ diagnostic.

Suppression

Suppress false positives by adding the suppression annotation @SuppressWarnings("SunApi") to the enclosing element.