InetAddressTest.java

import java.io.*;
import java.net.*;

/**
 * This program demonstrates the InetAddress class. Supply a host name as command-line argument, or
 * run without command-line arguments to see the address of the local host.
 * @version 1.02 2012-06-05
 * @author Cay Horstmann
 */
public class InetAddressTest
{
   public static void main(String[] args) throws IOException
   {
      if (args.length > 0)
      {
         String host = args[0];
         InetAddress[] addresses = InetAddress.getAllByName(host);
         for (InetAddress a : addresses)
            System.out.println(a);
      }
      else
      {
         InetAddress localHostAddress = InetAddress.getLocalHost();
         System.out.println(localHostAddress);
      }
   }
}