What is the associated IP address

bH <bherbst65@hotmail.com>
Wed, 26 Aug 2009 06:41:21 -0700 (PDT)
Hi All,
I want to know, what is the associated IP address to access
"localHost" using Mac OS 9.2.2 as it is in Windows XP?
When I use "" in Windows in the below program, the
result is the word "localhost".
When I use "" in the Mac in the below program
the result is the word "unknown".

My distant goal is to get a programs EchoClient.java and
EchoServer.java to work on the Mac. Now if I start the
EchoServer/EchoClient with the "" address
it wants to go out on the net and starts looking
and never returns (it hangs). Failure, since it does
not know "localHost " or "". Is there
a work around?

import java.net.InetAddress;
import java.net.UnknownHostException;

public class IPtoDNS
    * Find the DNS name associated with an IP
    * @param args not used
    * Downloaded from Roedy Green's Library
   public static void main ( String[] args )

         InetAddress[] addresses = InetAddress.getAllByName
("" /* ip or DNS name */ );

         for ( int i=0; i<addresses.length; i++ )
            String hostname = addresses[i].getHostName();
            System.out.println( hostname );
      catch ( UnknownHostException e )
         System.out.println( "unknown host" );


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