public abstract class Drink {

    public String desc;

    private float price;

    public String getDesc() {
        return desc;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }

    public float getPrice() {
        return price;
    }

    public void setPrice(float price) {
        this.price = price;
    }

    public abstract float cost();
}

public class Coffee extends Drink {

    @Override
    public float cost() {
        return super.getPrice();
    }
}

public class LongBlack extends Coffee{

    public LongBlack(){
        setDesc(" longblack ");
        setPrice(5.0f);
    }
}

public class Espresso extends Coffee {

    public Espresso(){
        setDesc(" 意大利咖啡 ");
        setPrice(1.0f);
    }
}

public class Decorator extends Drink {

    private Drink drink;

    public Decorator(Drink drink){
        this.drink = drink;
    }

    @Override
    public float cost() {
        return drink.cost() + super.getPrice();
    }

    @Override
    public String getDesc() {
        return desc + " " + getPrice()+ "&&" +  super.getDesc();
    }
}

public class Milk extends Decorator {

    public Milk(Drink drink){
        super(drink);
        setDesc( " 牛奶 ");
        setPrice(2.0f);
    }
}

public class Soy extends Decorator {

    public Soy(Drink drink) {
        super(drink);
        setDesc(" 豆漿 ");
        setPrice(3.0f);
    }
}

public class Client {
    public static void main(String[] args) {
        //裝飾者模式下 ：

        //1. 點一份 longblack
        Drink order = new LongBlack();
        System.out.println("費用1=" + order.cost());
        System.out.println("描述=" + order.getDesc());

        //2. order 加入牛奶
        order = new Milk(order);
        System.out.println(" order 加入牛奶 費用2= " + order.cost());
        System.out.println(" order 加入牛奶 描述=" + order.getDesc());

        //3. order 加入豆漿
        order = new Soy(order);
        System.out.println(" order 加入豆漿,加入牛奶 費用3= " + order.cost());
        System.out.println(" order 加入豆漿,加入牛奶 描述=" + order.getDesc());
    }
}