Player.java

public abstract class Player {

    protected int health;
    protected int strength;
    protected int lives;
    protected final int initialHealth;

    public Player(int health, int strength, int lives) {
        this.health = health;
        this.strength = strength;
        this.lives = lives;
        this.initialHealth = health;
    }

    public int getHealth() {
        return health;
    }

    public void setHealth(int health) {
        this.health = health;
    }

    public int getStrength() {
        return strength;
    }

    public void setStrength(int strength) {
        this.strength = strength;
    }

    public int getLives() {
        return lives;
    }

    public void setLives(int lives) {
        this.lives = lives;
    }

    public void decrementLive() {
        if (lives > 0) {
            lives--;
            health = initialHealth;
        } else {
            System.out.println("This character is dead");
        }
    }

    public void attack(Player playerToAttack) {
        playerToAttack.setHealth(playerToAttack.getHealth() - this.strength);
        playerToAttack.checkHealth();
    }

    public void checkHealth() {
        if (this.health <= 0) {
            this.decrementLive();
        }
    }
}

public class Warrior extends Player {
    private int force;

    public Warrior(int health, int strength, int lives, int force) {
        super(health, strength, lives);
        this.force = force;
    }

    public int getForce() {
        return force;
    }

    public void setForce(int force) {
        this.force = force;
    }

    public Elf convertToElf() {
        return new Elf(this.health, this.strength, this.lives, this.force);
    }
}

public class Elf extends Player {
    private int speed;

    public Elf(int health, int strength, int lives, int speed) {
        super(health, strength, lives);
        this.speed = speed;
    }

    public int getSpeed() {
        return speed;
    }

    public void setSpeed(int speed) {
        this.speed = speed;
    }
}


public class Wizard extends Player {
    private String spell;

    public Wizard(int health, int strength, int lives, String spell) {
        super(health, strength, lives);
        this.spell = spell;
    }

    public String getSpell() {
        return spell;
    }

    public void setSpell(String spell) {
        this.spell = spell;
    }

    public Elf convertToElf() {
        return new Elf(this.health, this.strength, this.lives, 0); // Assuming spell to speed conversion isn't specified
    }
}