Design Patterns and Best Practices in Java

Anonymous concrete factory

We continue the previous code by adding a BikeFactory from where customers can select a small bike or a large bike. We can do this without creating a separate class file; we can simply create an anonymous class that extends the VehicleFactory directly in the client code:

VehicleFactory bikeFactory = new VehicleFactory() {  @Override  protected Vehicle createVehicle(String size)   {    if (size.equals("small"))    return new MountainBike();    else if (size.equals("large"))    return new CityBike();    return null;   }};bikeFactory.orderVehicle("large", "blue");