public class Runway {
    private int id;
    private int length;
    private boolean isEmpty;

    public Runway(int id, int length) {
        this.id = id;
        this.length = length;
        this.isEmpty = true;
    }

    public int getId() {
        return id;
    }

    public void traffic () {
        isEmpty = false;
    }

    public void freeToUse() {
        isEmpty = true;
    }

    public boolean isEmpty() {
        return isEmpty;
    }

    public void setEmpty(boolean empty) {
        isEmpty = empty;
    }

    public int getLength() {
        return length;
    }
}