良いコード／悪いコードで学ぶ設計入門を読んで書いたコード

thinkingAbout_8_2_good_pattern.java

class Main {
    public static void main(String[] args) {
        final FighterPhysicalAttack fighterPhysicalAttack = new FighterPhysicalAttack(50);

        System.out.println(fighterPhysicalAttack.singleAttackDamage());
        System.out.println(fighterPhysicalAttack.doubleAttackDamage());
    }
}

class PhysicalAttack {
    private final int baseDamage;

    PhysicalAttack(final int baseDamage) {
        this.baseDamage = baseDamage;
    }

    int singleAttackDamage() {
        return baseDamage;
    }

    int doubleAttackDamage() {
        return singleAttackDamage() + singleAttackDamage();
    }
}

class FighterPhysicalAttack {
    private final PhysicalAttack physicalAttack;

    FighterPhysicalAttack(final int baseDamage) {
        physicalAttack = new PhysicalAttack(baseDamage);
    }

    int singleAttackDamage() {
        return physicalAttack.singleAttackDamage() + 20;
    }

    int doubleAttackDamage() {
        return physicalAttack.doubleAttackDamage() + 10;
    }
}