Java 11 is not yet fully supported on Gentoo. Packages cannot depend on it so these virtuals are not yet required. If you wish to use Java 11 then install openjdk-(jdk|jre)-bin directly.
Affected packages
virtual/jdk:11
Author/Date
James Le Cuirot <chewi@gentoo.org> (2017-12-17 00:00:00 +0000 UTC)
Packages