Date: 2019dec16 Language: Java Q. Java: Get remote IP-address of a Socket A.

String getRemoteIpAddress(final Socket socket) { return (((InetSocketAddress) socket.getRemoteSocketAddress()).getAddress()).toString().replace("/",""); }

This works for IPv4 and IPv6 socket.getRemoteSocketAddress() includes a slash and the port eg /192.168.1.100:1234