Question

Write a program to demonstrate the use of InetAddress. The program takes a list of names or IP addresses as command line parameters and prints the name and an IP address of the local host, followed by names and IP addresses of the hosts specified on the command line. use java program

Answer 1

import java.net.*;

public class IPCharacteristics {

  public static void main(String[] args) {

    try {
      InetAddress address = InetAddress.getByName(args[0]);

      if (address.isAnyLocalAddress()) {
        System.out.println(address + " is a wildcard address.");
      }
      if (address.isLoopbackAddress()) {
        System.out.println(address + " is loopback address.");
      }

      if (address.isLinkLocalAddress()) {
        System.out.println(address + " is a link-local address.");
      } else if (address.isSiteLocalAddress()) {
        System.out.println(address + " is a site-local address.");
      } else {
        System.out.println(address + " is a global address.");
      }

      if (address.isMulticastAddress()) {
        if (address.isMCGlobal()) {
          System.out.println(address + " is a global multicast address.");
        } else if (address.isMCOrgLocal()) {
          System.out.println(address
           + " is an organization wide multicast address.");
        } else if (address.isMCSiteLocal()) {
          System.out.println(address + " is a site wide multicast
                             address.");
        } else if (address.isMCLinkLocal()) {
          System.out.println(address + " is a subnet wide multicast
                             address.");
        } else if (address.isMCNodeLocal()) {
          System.out.println(address
           + " is an interface-local multicast address.");
        } else {
          System.out.println(address + " is an unknown multicast
                             address type.");
        }
      } else {
        System.out.println(address + " is a unicast address.");
      }
    } catch (UnknownHostException ex) {
      System.err.println("Could not resolve " + args[0]);
    }
  }
}