Java(Class2)_Polymorphism_02

2024-11-01

 

 

 

 

 

car.tire >>> polymorphism.HanKookTire@6504e3b2
한국타이어가 회전을 합니다.

car.tire >>> polymorphism.KumHoTire@7b3300e5
금호타이어가 회전을 합니다.

 

package polymorphism;

public interface Tire {

	void roll();
}

 

package polymorphism;

public class HanKookTire implements Tire{

	@Override
	public void roll() {
	
		System.out.println("한국타이어가 회전을 합니다.");
	}
}

 

package polymorphism;

public class KumHoTire implements Tire {

	@Override
	public void roll() {
	
		System.out.println("금호타이어가 회전을 합니다.");
	}
}

 

package polymorphism;

public class Car {

	//  멤버변수
	Tire tire;		//  has a  개념.(객체생성의 개념은 아님.)
	
	void run() {
		
		tire.roll();
	}
}

 

package polymorphism;

public class Car_02 {

	public static void main(String[] args) {
		
		Car car = new Car();
		
		car.tire = new HanKookTire();
		//Tire tire = new HanKookTire();	과 동일.
		
		System.out.println("car.tire >>> " + car.tire);
		
		car.run();
		
		System.out.println();
		
		car.tire = new KumHoTire();
		//Tire tire = new KumHoTire();	과 동일.
		
		System.out.println("car.tire >>> " + car.tire);
		
		car.run();
	}
}