Currently JarFileSystem uses sun.misc.Version to retrieve the major version. It should be updated to use the new JDK specific Version API.

diff --git a/src/jdk.zipfs/share/classes/jdk/nio/zipfs/JarFileSystem.java b/src/jdk.zipfs/share/classes/jdk/nio/zipfs/JarFileSystem.java
--- a/src/jdk.zipfs/share/classes/jdk/nio/zipfs/JarFileSystem.java
+++ b/src/jdk.zipfs/share/classes/jdk/nio/zipfs/JarFileSystem.java
@@ -36,6 +36,7 @@
 import java.util.function.Function;
 import java.util.jar.Attributes;
 import java.util.jar.Manifest;
+import jdk.Version;
 
 /**
  * Adds aliasing to ZipFileSystem to support multi-release jar files. An alias map
@@ -68,14 +69,14 @@
             if (o instanceof String) {
                 String s = (String)o;
                 if (s.equals("runtime")) {
- version = sun.misc.Version.jdkMajorVersion(); // fixme waiting for jdk.util.Version
+ version = jdk.Version.current().major();
                 } else {
                     version = Integer.parseInt(s);
                 }
             } else if (o instanceof Integer) {
                 version = (Integer)o;
- } else if (false /*o instanceof Version*/) { // fixme waiting for jdk.util.Version
-// version = ((Version)o).major();
+ } else if (o instanceof Version) {
+ version = ((Version)o).major();
             } else {
                 throw new IllegalArgumentException("env parameter must be String, Integer, "
                         + "or Version");