Hi, <https://bugs.openjdk.java.net/browse/JDK-8143850> <https://bugs.openjdk.java.net/browse/JDK-8143850> I did this awhile ago and I'd like to submit it. I believe it needs to be a new class because it changes the behavior of equals and hashcode. My implementation is based off of the java 8 version I think and it has changed a lot since then, I could add some of the improvements if you want. Also I'm not sure if we should make a new Deque + List interface for it to implement or not. Code: https://pastebin.com/suXMfMZW Bug: https://bugs.openjdk.java.net/browse/JDK-8143850 Previous discussion:<https://bugs.openjdk.java.net/browse/JDK-8143850> <https://bugs.openjdk.java.net/browse/JDK-8143850>http://mail.openjdk.java.net/pipermail/core-libs-dev/2014-February/024938.html <https://bugs.openjdk.java.net/browse/JDK-8143850>Alex<http://mail.openjdk.java.net/pipermail/core-libs-dev/2014-February/024938.html>