public static void main(String args[]){
        
        int op = 0;
        
        do{
            try {
                System.out.println("1- Agregar Cliente");
                System.out.println("2- Generar Revision");
                System.out.println("3- Actualizar Monto");
                System.out.println("4- Historial Cliente");
                System.out.println("5- Cliente Estrella");
                System.out.println("6- Backup");
                System.out.println("7- Salir");
                System.out.println("Escoja opcion: ");
                op = lea.nextInt();
                
                switch( op ){
                    case 1:
                        agregarCliente();
                        break;
                    case 2:
                        generar();
                        break;
                    case 3:
                        actualizar();
                        break;
                    case 4:
                        historial();
                        break;
                    case 5:
                        estrella();
                        break;
                    case 6:
                        backup();
                        break;
                }
            } catch (IOException ex) {
                System.out.println("ERROR: " + ex.getMessage());
            }
            
        }while( op != 7);
        
    }