void connectionFailed() {
login.setEnabled(true);
logout.setEnabled(false);
// whoIsIn.setEnabled(false);
chatStatus.setText("Please login first");
chatField.setText("");
// reset port number and host name as a construction time
tfPort.setText("" + defaultPort);
tfServer.setText(defaultHost);
// let the user change them
tfServer.setEditable(false);
tfPort.setEditable(false);
// don't react to a <CR> after the username
chatField.removeActionListener(this);
connected = false;
}
