In JDK 9, the sun.security.acl package will be removed and the java.security.acl package will be deprecated. The technotes guide for java.security.acl, which shows example code using sun.security.acl, is not necessary and should be removed once the sun.security.acl package is removed from the code base.

The doc is question is: pubs/docs/technotes/guides/security/Acl.html