java.net.ProtocolFamily Class in Java

// Java Program to get Protocol
// family for an IP Address
// import Guava library
import com.google.common.net.InetAddresses;
import java.io.*;
import java.net.*;
class GFG {
    public static void main(String[] args)
    {
        try {
            // to get the ip address of
            InetAddress ip
                = InetAddress.getByName("45.22.30.39");
            System.out.println("Host Name is "
                               + ip.getHostName());
            // getProtocolFamily() will check and return the
            // protocol family of the given IP
            ProtocolFamily protocolFamily
                = getProtocolFamily(ip);
            System.out.println("Protocol family of the "
                               + ip.getHostName() + " is "
                               + protocolFamily);
        }
        catch (Exception e) {
            System.out.println("Some exception"
                               + e.getMessage());
        }
    }
    public static ProtocolFamily
    getProtocolFamily(InetAddress inetAddress)
    {
        // to check if address is valid or not
        if (InetAddresses.isInetAddress(
                inetAddress.getHostName())) {
            // if address is valid
            // will return the protocol family of the
            // address
            return StandardProtocolFamily.INET;
        }
        else {
            // address is not valid
            System.out.println(
                "Address " + inetAddress
                + "is invalid hence can't determine the protocol family");
        }
        return StandardProtocolFamily.INET;
    }
}