checkDriver("com.mysql.jdbc.Driver"))
            System.out.println("mysqlDriver ok !");
        else
                System.exit(1);
    String DB_URL = "jdbc:mysql://localhost:3306/sklep?useUnicode=true&characterEncoding=utf-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC";
    con =DriverManager.getConnection(DB_URL,"root","");
    st =createStatement(con);
        if(executeUpdate(st,"USE sklep;")==0)
            System.out.println("Baza restaurant wybrana.");
        else
                System.out.println("Baza nie istnieje");