코드 위치: ch1/6.java

abstract class Coffee { 
    public abstract int getPrice(); 
    
    @Override
    public String toString() {
        return "Hi this coffee is " + this.getPrice();
    }
}
class CoffeeFactory { 
    public static Coffee getCoffee(String type, int price) {
        if ("Latte".equalsIgnoreCase(type)) return new Latte(price);
        else if ("Americano".equalsIgnoreCase(type)) return new Americano(price);
        else {
            return new DefaultCoffee();
        } 
    }
}
class DefaultCoffee extends Coffee {
    private int price;

    public DefaultCoffee() {
        this.price = -1;
    }

    @Override
    public int getPrice() {
        return this.price;
    }
}
class Latte extends Coffee { 
    private int price; 
    
    public Latte(int price) {
        this.price = price; 
    }
    @Override
    public int getPrice() {
        return this.price;
    } 
}
class Americano extends Coffee { 
    private int price; 
    
    public Americano(int price) {
        this.price = price; 
    }
    @Override
    public int getPrice() {
        return this.price;
    } 
} 
public class HelloWorld { 
     public static void main(String[] args) { 
        Coffee latte = CoffeeFactory.getCoffee("Latte", 4000);
        Coffee ame = CoffeeFactory.getCoffee("Americano", 3000); 
        System.out.println("Factory latte ::" + latte);
        System.out.println("Factory ame ::" + ame); 
     }
} 
/*
Factory latte ::Hi this coffee is 4000
Factory ame ::Hi this coffee is 3000
*/