public void actionPerformed(ActionEvent e){
        Object source = e.getSource();
        if(source == deconnexion){
            this.frame.connexion_co(true);
        }
        else if(source == valide_choix){
            int rang = this.choix.getSelectedIndex();
            switch(rang){
                case 0:break;
                case 1:break;
                case 2:break;
                case 3:break;
                case 4:break;
            }
        }
    }