@Override public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (getClass() != obj.getClass()) return false; TaxiOrder other = (TaxiOrder) obj; if (position == null) { if (other.position != null) return false; } else if (!position.equals(other.position)) return false; if (taxi == null) { if (other.taxi != null) return false; } else if (!taxi.equals(other.taxi)) return false; return true; }