Customer 프로젝트 다형성 활용

Customer.java

package customerpkg;

public class Customer {
	protected int customerID;
	protected String customerName;
	protected String customerGrade;
	int bonusPoint;
	double bonusRatio;
	
	public Customer() {
		initCustomer();
	}
	
	public Customer(int customerID, String customerName) {
		this.customerID = customerID;
		this.customerName = customerName;
		initCustomer();
	}
	
	private void initCustomer() {
		customerGrade = "SILVER";
		bonusRatio = 0.01;
	}
	
	public int calcPrice(int price) {
		bonusPoint += price * bonusRatio;
		return price;
	}
	
	public void setCustomerID(int customerID) {
		this.customerID = customerID;
	}
	
	public int getCustomerID() {
		return this.customerID;
	}
	
	public String showCustomerInfo() {
		return customerName + "님의 등급은 " + customerGrade + "이며, 보너스 포인트는 " + bonusPoint + "입니다.";
	}
	
	public void setCustomerName(String customerName) {
		this.customerName = customerName;
	}
	
	public String getCustomerName() {
		return this.customerName;
	}
	
	public void setCustomerGrade(String customerGrade) {
		this.customerGrade = customerGrade;
	}
	
	public String getCustomerGrade() {
		return this.customerGrade;
	}
}

CustomerTest.java

package customerpkg;
import java.util.ArrayList;

public class CustomerTest {

	public static void main(String[] args) {
		ArrayList<Customer> customerList = new ArrayList<Customer>();
		
		Customer customerKim = new Customer(1, "김선생");
		Customer customerLee = new Customer(2, "이선생");
		Customer customerChoi = new GoldCustomer(3, "최선생");
		Customer customerPark = new GoldCustomer(4, "박선생");
		Customer customerJung = new VIPCustomer(5, "정선생", 777);
		
		customerList.add(customerKim);
		customerList.add(customerLee);
		customerList.add(customerChoi);
		customerList.add(customerPark);
		customerList.add(customerJung);
		
		System.out.println("=====고객 정보 출력=====");
		for (Customer c : customerList) {
			System.out.println(c.showCustomerInfo());
		}
		
		System.out.println("=====할인률과 보너스 포인트 계산=====");
		for (Customer c : customerList) {
			int cost = c.calcPrice(10000);
			System.out.println(c.getCustomerName() + " 님이 " + cost + "원 지불하셨습니다.");
			System.out.println(c.getCustomerName() + " 님의 현재 보너스 포인트는 " + c.bonusPoint + "점입니다.");
		}
	}

}

GoldCustomer.java

package customerpkg;

public class GoldCustomer extends Customer {
	double saleRatio;
	
	public GoldCustomer(int customerID, String customerName) {
		super(customerID, customerName);
		customerGrade = "GOLD";
		bonusRatio = 0.02;
		saleRatio = 0.1;
	}
	
	public int calcPrice(int price) {
		bonusPoint += price * bonusRatio;
		return price - (int)(price * saleRatio);
	}
}

VIPCustomer.java

package customerpkg;

public class VIPCustomer extends Customer {
	private int agentID;
	double saleRatio;
	
	public VIPCustomer(int customerID, String customerName, int agentID) {
		super (customerID, customerName);
		customerGrade = "VIP";
		bonusRatio = 0.05;
		saleRatio = 0.1;
		this.agentID = agentID;
	}
	
	public int calcPrice(int price) {
		bonusPoint += price * bonusRatio;
		return price - (int)(price * saleRatio);
	}
	
	public String showCustomerInfo() {
		return super.showCustomerInfo() + " 담당 상담원 번호는 " + agentID + "입니다.";
	}
	
	public int getAgentID() {
		return agentID;
	}
}