import java.net.InetAddress;

import java.net.UnknownHostException;

public class Test

{
       public static void main(String[] args)
       {
              String host;
              try
              {
                     host = InetAddress.getLocalHost().getHostName();
                     System.out.println(host);
              }
              catch (UnknownHostException e)
              {
                     // TODO Auto-generated catch block
                     e.printStackTrace();
              }
       }
}