Runtime.Version.version should be an int[] instead of a List<Integer>

http://mail.openjdk.java.net/pipermail/core-libs-dev/2016-February/039096.html

"I think it would be better to internally maintain an int[] for the version numbers rather than List<Integer>, that is more efficient in terms of space and comparing/equality (you can even use the new array comparison methods, thus the compareVersion becomes a one-liner)."