// This is a factory thats only job is creating ships

// By encapsulating ship creation, we only have one

// place to make modifications

public class EnemyShipFactory2{

// This could be used as a static method if we

// are willing to give up subclassing it

public EnemyShip2 makeEnemyShip(String newShipType){

EnemyShip newShip = null;

if (newShipType.equals("U")){

return new UFOEnemyShip3();

} else

if (newShipType.equals("R")){

return new RocketEnemyShip2();

} else

if (newShipType.equals("B")){

return new BigUFOEnemyShip2();

} else return null;

}

}