public class HayesModem implements Modem
{
public void dial(String pno){}
public void hangup(){}
public void send(char c){}
public char recv() {return 0;}
public void accept(ModemVisitor v)
{
try
{
HayesModemVisitor hv =
(HayesModemVisitor)v;
hv.visit(this);
}
catch (ClassCastException e)
{
}
}
String configurationString = null;
}
End of Listing