[Java] 12.3. 메서드 오버라이딩

문제

예제

package ex05.ch03;

class Protoss {
}

class River {
    int hp;
    int power;

    public River() {
        this.hp = 100;
        this.power = 50;
    }

    public void attack(River unit) {
        unit.hp = unit.hp - this.power;
    }

    public void attack(Zealot unit) {
        unit.hp = unit.hp - this.power;
    }

    public void attack(Dragoon unit) {
        unit.hp = unit.hp - this.power;
    }
}

class Dragoon {
    int hp;
    int power;

    public Dragoon() {
        this.hp = 100;
        this.power = 10;
    }

    // 기존 오브젝트 수정
    public void attack(River unit) {
        unit.hp = unit.hp - this.power;
    }

    public void attack(Zealot unit) {
        unit.hp = unit.hp - this.power;
    }

    public void attack(Dragoon unit) {
        unit.hp = unit.hp - this.power;
    }
}

class Zealot {
    int hp;
    int power;

    public Zealot() {
        this.hp = 100;
        this.power = 20;
    }

    // 기존 오브젝트 수정
    public void attack(River unit) {
        unit.hp = unit.hp - this.power;
    }

    public void attack(Dragoon unit) {
        unit.hp = unit.hp - this.power;
    }

    public void attack(Zealot unit) {
        unit.hp = unit.hp - this.power;
    }
}

public class StarGame {
    public static void main(String[] args) {
        Zealot z1 = new Zealot();
        Zealot z2 = new Zealot();
        Dragoon d1 = new Dragoon();

        z1.attack(d1);
        System.out.println("드라군 d1의 hp : " + d1.hp);

        z1.attack(z2);
        System.out.println("질럿 z2의 hp : " + z2.hp);
    }
}