public class OrderServiceImpl implements OrderService{ private final MemoryRepository memoryRepository = new MemoryMemberRepository(); private final DiscountPolicy discountPolicy = new FixDiscountPolicy(); 위 코드에서 할인정책(discountPolicy)을 고정 할인(FixDiscountPolicy) 에서 비율 할인(RateDiscountPolicy)로 바꿀려한다 private final MemoryRepository memoryRepository = new MemoryMemberRepository(); private final Discount..