Andrew Leonard proposed a cleanup for /src/jdk.management.agent/share/classes/sun/management/jdp/JdpController.java in this mailing list thread:
http://mail.openjdk.java.net/pipermail/serviceability-dev/2018-February/023107.html

There's also opportunity for doing include cleanups in src/java.base/share/classes/java/util/jar/Attributes.java.