import java.util.ArrayList;

public class FlightDatabase {
    ArrayList<Flight> flights = new ArrayList<Flight> ();

    public FlightDatabase ( ) {
        this.flights.add ( new Flight ( "Wroclaw", "Berlin" ) );
        this.flights.add ( new Flight ( "Warsaw", "Poznan" ) );
        this.flights.add ( new Flight ( "Krakow", "Vienna" ) );
        this.flights.add ( new Flight ( "Wroclaw", "Rotterdam" ) );
        this.flights.add ( new Flight ( "Warsaw", "Moscow" ) );
        this.flights.add ( new Flight ( "Wroclaw", "Frankfurt" ) );
        this.flights.add ( new Flight ( "Warsaw", "London" ) );
        this.flights.add ( new Flight ( "Krakow", "Paris" ) );
    }

    public void checkIfFlightExists ( ) {

        for (int i = 0; i < this.flights.size (); i++) {
            Flight connection = flights.get ( i );
            if (this.flights.equals ( connection ){
                System.out.println ("There is such connection");

            }


        }
    }
}