필드의 다양성 코드 짜봄

package com.day3;

public class HankookTire implements Tire {
	public void roll() {
		System.out.println("한국 타이어가 굴러갑니다");
	}

}​

package com.day3;

public class Car {
	Tire frontLeftTire = new HankookTire();
	Tire frontRigthTire = new HankookTire();
	Tire backLeftTire = new HankookTire();
	Tire backRightTire = new HankookTire();

	void run() {
		frontLeftTire.roll();
		frontRigthTire.roll();
		backLeftTire.roll();
		backRightTire.roll();
	}
}

package com.day3;

public interface Tire {
	public void roll();  //roll메소드 호출 방법 설명
}

package com.day3;

public class CarExample {

	public static void main(String[] args) {
		Car myCar = new Car();
		
		
		myCar.run();
		
		myCar.frontLeftTire = new  KumhoTire();
		myCar.frontRigthTire = new  KumhoTire();
		
		myCar.run();
	}
}