Problem with connection ?

[Buzoianu Stefan]

Hyaa!
I wrote this application but when I run "exFTP www.yahoo.com" 
I give something like this "UnknowHostexception www.yahoo.com"
What is the problem ?
import sun.net.ftp.*;
import java.net.*;
import sun.net.*;

class exFTP{
 static FtpClient ftp;
public static void main(String args[]) throws java.io.IOException
      {
       int c;
       StringBuffer zonaTampon=new StringBuffer();
       ftp=new FtpClient(args[0]);
       ftp.login("ftp","[EMAIL PROTECTED]");
       ftp.ascii();
       TelnetInputStream t=ftp.list();
       while((c=t.read())>=0)
         zonaTampon.append((char)c);
       t.close();
       System.out.println(zonaTampon.toString());
       System.out.println("Nume fisier de incarcat :");
       zonaTampon.setLength(0);
       while((c=System.in.read())!='\n')
         zonaTampon.append((char)c);
       t=ftp.get(zonaTampon.toString());
       zonaTampon.setLength(0);
       while((c=t.read())>=0)
         zonaTampon.append((char)c);
       t.close();
       System.out.println(zonaTampon.toString());

   }
 }