scala get ipv4 address
825 ワード
scalaはisInstanceOfでエラーを報告し(instanceofという関数はない)、javaの下でinstanceofを使ってInet 4 Addressかどうかを判断します
test("get ipv4 address") {
val ipAddr = InetAddress.getLocalHost.getHostAddress
val interfaces: util.Enumeration[NetworkInterface] = NetworkInterface.getNetworkInterfaces
while(interfaces.hasMoreElements) {
val ele = interfaces.nextElement
val addrs: util.Enumeration[InetAddress] = ele.getInetAddresses
while(addrs.hasMoreElements) {
val addr: InetAddress = addrs.nextElement()
addr match {
case some: Inet4Address if !addr.isLoopbackAddress =>
println(some.getHostAddress)
case _ =>
// do nothing
}
}
}
}