인터페이스 (자바)

//importation 인터페이스


public interface Importation {
 public abstract double calculate_traiff();
 

}

//Sale 인터페이스

public interface Sale {
 public abstract double calculate_tax();
}

//Car 클래스

public class Car implements Importation, Sale {
 
 String make;
 String model;
 int year;
 int max_speed;
 float price;
 
 public double getTotalPrice(){
  return (price + calculate_traiff() + calculate_tax());
 }

 public double calculate_traiff() {
  return price*0.1;
 }

 public double calculate_tax() {

  return price*0.3;
 }

}

//Clotaes 클래스

public class Clotaes implements Importation, Sale {
 String make;
 String model;
 float price;

 public double getTotalPrice() {
  return (price + calculate_traiff() + calculate_tax());
 }

 @Override
 public double calculate_traiff() {
  return (price*0.05);
 }
 

 public double calculate_tax(){
  return price*0.2;  
 }

}