String user="hr";
        String haslo="hr";
        String databaseURL="jdbc:oracle:thin:@"+"localhost"+":"+"1521"+":xe";

        try{
            //Ladowanie sterownika
            Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
            //Nawiazywanie polaczenia
            System.out.println("Polaczony?");

            connection=DriverManager.getConnection(databaseURL, user, haslo);
            System.out.println("Polaczony");

        }catch(Exception e){
            //Jak blad...

            System.out.println("BLAD!!!!");
            System.out.println(e.getMessage());

        }