get my local IPs and my remote IPs / published by https://github.com/dacr/code-examples-manager #20e89a12-9183-4d0b-9c82-1f55bc583cd0/920e3b4df5364b8896c97ef1ba04b217b7f5d653

my-ips.sc

// summary : get my local IPs and my remote IPs
// keywords : scala, dns, resolution, @testable
// publish : gist
// authors : David Crosson
// license : Apache NON-AI License Version 2.0 (https://raw.githubusercontent.com/non-ai-licenses/non-ai-licenses/main/NON-AI-APACHE2)
// id : 20e89a12-9183-4d0b-9c82-1f55bc583cd0
// created-on : 2020-07-18T15:24:11Z
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file

// ---------------------
//> using scala "3.4.2"
// ---------------------

def hostname(): String = java.net.InetAddress.getLocalHost().getHostName
def hostAddress(): String = java.net.InetAddress.getLocalHost().getHostAddress

def lanAddresses(): List[String] = {
  import scala.jdk.CollectionConverters._
  java.net.NetworkInterface
    .getNetworkInterfaces().asScala
    .filterNot(_.isLoopback)
    .filterNot(_.isVirtual)
    .filter(_.isUp)
    .toList
    .flatMap { interface =>
      val ips = interface
        .getInetAddresses.asScala
        .to(List)
        .filterNot(_.isAnyLocalAddress)
        .collect { case x: java.net.Inet4Address => x.getHostAddress }
      ips.headOption
    }
}

println("hostname = " + hostname())
println("address = " + hostAddress())
println("addresses= "+ lanAddresses().mkString(", "))