log.error(ex);
System.err.println(ex);
    public void actionPerformed(ActionEvent e) {        String     command=e.getActionCommand();        if("Clear".equals(command)) {            if(no_channel) {                clearPanel();                return;            }            sendClearPanelMsg();        }        else if("Leave & Exit".equals(command)) {            if(!no_channel) {                try {                    channel.close();                }                catch(Exception ex) {                    log.error(ex);                }            }            mainFrame.setVisible(false);            mainFrame.dispose();            System.exit(0);        }        else            System.out.println("Unknown action");    }