This paper discusses the implementation of an \emph{IPv6.java.net} package allowing distributed applications to benefit from all the new aspects of the IPv6 protocol such as: security, flow control, mobility and multicast. Moreover, we present a full IP Next Generation Compliant \emph{Java Virtual Machine}, that is a JVM which is able to handle both IPv4 and IPv6 protocols from standard Java APIs and in a totally transparently way for the user/programmer.