【设计模式】Headfirst设计模式——简单工厂运行代码

public class Pizza {
    public void prepare()
    {
        System.out.println("preparing...");
    }
    public void bake()
    {
        System.out.println("baking...");
    }
    public void cut()
    {
        System.out.println("cutting...");
    }
    public void box()
    {
        System.out.println("boxing...");
    }

    public static void main(String[] args) {
        SimpleFactory sim=new SimpleFactory();
        PizzaStore pizzastore=new PizzaStore(sim);
        System.out.println("1st pizza");
        pizzastore.orderPizza("cheese");
        System.out.println("2rd pizza");
        pizzastore.orderPizza("veggie");

    }
}
class CheesePizza extends Pizza{
    String type="Cheese";
    CheesePizza(){
        System.out.println("cheesepizza created");
    }
}
class ClamPizza extends Pizza{
    String type="Clam";
    ClamPizza(){
        System.out.println("clampizza created");
    }

}
class VeggiePizza extends Pizza{
    String type="Veggie";
    VeggiePizza(){
        System.out.println("veggiepizza created");
    }
}

class SimpleFactory {
    public Pizza createPizza(String type) {
        Pizza pizza = null;
        if (type.equals("cheese")) {
            pizza = new CheesePizza();
        } else if (type.equals("clam")) {
            pizza = new ClamPizza();
        } else if (type.equals("veggie")) {
            pizza = new VeggiePizza();
        }
        return pizza;
    }
}

class PizzaStore {
    SimpleFactory simpleFactory;

    public PizzaStore(SimpleFactory simpleFactory) {
        this.simpleFactory = simpleFactory;
    }

    Pizza orderPizza(String type) {
        Pizza pizza = null;

        pizza = simpleFactory.createPizza(type);

        pizza.prepare();
        pizza.bake();
        pizza.cut();
        pizza.box();
        return pizza;
    }
}