I am trying to learn how to utilize Java 8 features(such as lambdas and streams) in my daily programming, since it makes for much cleaner code.

Here's what I am currently working on: I get a string stream from a local file with some data which I turn into objects later. The input file structure looks something like this:

Airport name; Country; Continent; some number;

And my code looks like this:

public class AirportConsumer implements AirportAPI {

List<Airport> airports = new ArrayList<Airport>();

@Override
public Stream<Airport> getAirports() {
    Stream<String> stream = null;
    try {
        stream = Files.lines(Paths.get("resources/planes.txt"));
        stream.forEach(line -> createAirport(line));

    } catch (IOException e) {
        e.printStackTrace();
    }
    return airports.stream();
}

public void createAirport(String line) {
    String airport, country, continent;
    int length;


    airport = line.substring(0, line.indexOf(';')).trim();
    line = line.replace(airport + ";", "");
    country = line.substring(0,line.indexOf(';')).trim();
    line = line.replace(country + ";", "");
    continent = line.substring(0,line.indexOf(';')).trim();
    line = line.replace(continent + ";", "");
    length = Integer.parseInt(line.substring(0,line.indexOf(';')).trim());
    airports.add(new Airport(airport, country, continent, length));
    }
}

And in my main class I iterate over the object stream and print out the results:

public class Main {



public void toString(Airport t){
  System.out.println(t.getName() + " " + t.getContinent());
}

public static void main(String[] args) throws IOException {
    Main m = new Main();
    m.whatever();

}

private void whatever() throws IOException {
    AirportAPI k = new AirportConsumer();
    Stream<Airport> s;
    s = k.getAirports();
    s.forEach(this::toString);

}


}

My question is this: How can I optimize this code, so I don't have to parse the lines from the file separately, but instead create a stream of objects Airport straight from the source file? Or is this the extent in which I can do this?