import java.net.*;

import java.util.*;



public class FindLoopback {

public static void main(final String... args) throws SocketException {

for(final Enumeration<NetworkInterface> interfaces =

NetworkInterface.getNetworkInterfaces();

interfaces.hasMoreElements();) {

final NetworkInterface networkInterface = interfaces.nextElement();

if(networkInterface.isLoopback())

for(InterfaceAddress address: networkInterface.getInterfaceAddresses())

System.out.printf("%s\t%s%n",

networkInterface.getDisplayName(),

address.getAddress());

}

}

}