public class HelloWorld {
public static void main(String[] args) {
FastFood food = new FriedRice();
System.out.println(food.getDesc() + " " + food.cost() + "元");
System.out.println("========");
FastFood food1 = new FriedRice();
food1 = new Egg(food1);
System.out.println(food1.getDesc() + " " + food1.cost() + "元");
System.out.println("========");
FastFood food2 = new FriedNoodles();
food2 = new Bacon(food2);
System.out.println(food2.getDesc() + " " + food2.cost() + "元");
}
}
abstract class FastFood {
private float price;
private String desc;
public FastFood() {}
public FastFood(float price, String desc) {
this.price = price;
this.desc = desc;
}
public float getPrice() {
return price;
}
public void setPrice(float price) {
this.price = price;
}
public String getDesc() {
return desc;
}
public void setDesc(String desc) {
this.desc = desc;
}
public abstract float cost();
}
class FriedRice extends FastFood {
public FriedRice() {
super(10, "炒饭");
}
@Override
public float cost() {
return getPrice();
}
}
class FriedNoodles extends FastFood {
public FriedNoodles() {
super(12, "炒面");
}
@Override
public float cost() {
return getPrice();
}
}
abstract class Garnish extends FastFood {
private FastFood fastFood;
public FastFood getFastFood() {
return fastFood;
}
public void setFastFood(FastFood fastFood) {
this.fastFood = fastFood;
}
public Garnish(FastFood fastFood, float price, String desc) {
super(price, desc);
this.fastFood = fastFood;
}
}
class Egg extends Garnish {
public Egg(FastFood fastFood) {
super(fastFood, 1, "鸡蛋");
}
@Override
public float cost() {
return getPrice() + getFastFood().getPrice();
}
@Override
public String getDesc() {
return super.getDesc() + getFastFood().getDesc();
}
}
class Bacon extends Garnish {
public Bacon(FastFood fastFood) {
super(fastFood,2,"培根");
}
@Override
public float cost() {
return getPrice() + getFastFood().getPrice();
}
@Override
public String getDesc() {
return super.getDesc() + getFastFood().getDesc();
}
}
