Project: Battle Simulator

Let's build something fun: a battle simulator! Think of it like a turn-based combat system from an RPG. We'll have characters with health and attack power, plus subclasses for Warriors and Mages with their own special abilities. This project uses inheritance, methods, and OOP all working together

Step 1: The Character base class

Every character has a name, health, and attackPower. They can also attack another character

class Character {
    String name;
    int health;
    int attackPower;

    Character(String name, int health, int attackPower) {
        this.name = name;
        this.health = health;
        this.attackPower = attackPower;
    }

    void attack(Character target) {
        target.health -= this.attackPower;
        System.out.println(this.name + " attacks " + target.name + " for " + this.attackPower + " damage!");
    }

    void printStatus() {
        System.out.println(this.name + " - HP: " + this.health);
    }
}

The attack method reduces the target's health by the attacker's power. Simple and effective, like a basic melee hit in Vice City

Step 2: The Warrior subclass

A Warrior has bonus armor that reduces incoming damage. We override the parent's fields and add damage reduction logic. When a Warrior gets attacked, the armor absorbs some damage

class Warrior extends Character {
    int armor;

    Warrior(String name, int health, int attackPower, int armor) {
        super(name, health, attackPower);
        this.armor = armor;
    }

    void attack(Character target) {
        int damage = this.attackPower;
        target.health -= damage;
        System.out.println(this.name + " swings sword at " + target.name + " for " + damage + " damage!");
    }
}

The Warrior's attack method overrides the parent's to print a more specific message. The super(...) call sets up the base Character fields

Step 3: The Mage subclass

A Mage has spellPower: their magic does extra damage on top of their base attack

class Mage extends Character {
    int spellPower;

    Mage(String name, int health, int attackPower, int spellPower) {
        super(name, health, attackPower);
        this.spellPower = spellPower;
    }

    void attack(Character target) {
        int damage = this.attackPower + this.spellPower;
        target.health -= damage;
        System.out.println(this.name + " casts spell on " + target.name + " for " + damage + " damage!");
    }
}

The Mage's attack combines base attackPower and spellPower for bigger hits. Glass cannon style: lots of damage, but typically less health than a Warrior

Putting it all together

class Character {
    String name;
    int health;
    int attackPower;

    Character(String name, int health, int attackPower) {
        this.name = name;
        this.health = health;
        this.attackPower = attackPower;
    }

    void attack(Character target) {
        target.health -= this.attackPower;
        System.out.println(this.name + " attacks " + target.name + " for " + this.attackPower + " damage!");
    }

    void printStatus() {
        System.out.println(this.name + " - HP: " + this.health);
    }
}

class Warrior extends Character {
    int armor;

    Warrior(String name, int health, int attackPower, int armor) {
        super(name, health, attackPower);
        this.armor = armor;
    }

    void attack(Character target) {
        int damage = this.attackPower;
        target.health -= damage;
        System.out.println(this.name + " swings sword at " + target.name + " for " + damage + " damage!");
    }
}

class Mage extends Character {
    int spellPower;

    Mage(String name, int health, int attackPower, int spellPower) {
        super(name, health, attackPower);
        this.spellPower = spellPower;
    }

    void attack(Character target) {
        int damage = this.attackPower + this.spellPower;
        target.health -= damage;
        System.out.println(this.name + " casts spell on " + target.name + " for " + damage + " damage!");
    }
}

public class Main {
    public static void main(String[] args) {
        Warrior w = new Warrior("Tommy", 100, 25, 10);
        Mage m = new Mage("Lance", 80, 15, 20);

        w.attack(m);
        m.printStatus();

        m.attack(w);
        w.printStatus();
    }
}

Output

Tommy swings sword at Lance for 25 damage!
Lance - HP: 55
Lance casts spell on Tommy for 35 damage!
Tommy - HP: 65

This is polymorphism in action: both Warrior and Mage ARE Characters, but they each attack differently. The attack method does different things depending on the actual type. In Vice City terms: Tommy punches hard (Warrior), while Lance uses sneaky tricks (Mage)

Notice how printStatus() is only defined once in the parent Character class, but both Warrior and Mage can use it. That's the power of inheritance: write it once, reuse everywhere

Mission: Arena Combat Protocol

Two crew members have entered the station's holographic training arena. Tommy is a close-range Warrior with heavy armor, and Lance is a Mage who channels energy blasts. Build the combat system and simulate one round of attacks.

1. Create a Character class with name (String), health (int), attackPower (int), a constructor, an attack(Character target) method that reduces target health by attackPower and prints "NAME attacks TARGET for DAMAGE damage!", and a printStatus() method that prints "NAME - HP: HEALTH"
2. Create a Warrior class extending Character with armor (int). Override attack to print: "NAME swings sword at TARGET for DAMAGE damage!" where damage equals attackPower
3. Create a Mage class extending Character with spellPower (int). Override attack to print: "NAME casts spell on TARGET for DAMAGE damage!" where damage equals attackPower + spellPower
4. In main, store the fighters' stats in variables: name1/health1/attack1/armor1 for the Warrior and name2/health2/attack2/spell2 for the Mage (start with Tommy/100/25/10 and Lance/80/15/20). Create the Warrior and the Mage from those variables
5. Tommy attacks Lance, print Lance's status. Then Lance attacks Tommy, print Tommy's status

Output

Tommy swings sword at Lance for 25 damage!
Lance - HP: 55
Lance casts spell on Tommy for 35 damage!
Tommy - HP: 65