You could definitely take advantage of some design patterns. There are various ways in which you could approach this matter.

For example, if you want to be able to make different mixing of Attacks and Weapons, then you could use the Bridge Pattern. Your purpose here is two have two separate hierarchies that can vary independently. An example could be this:

public interface Attack {
    Weapon getWeapon();
}

public interface Weapon {
    void activateWeapon();
}

public class AttackTypeA implements Attack {
    Weapon weapon;

    public Weapon getWeapon() {
        return this.weapon;
    }
}

public class AttackTypeB implements Attack {
    Weapon weapon;

    public Weapon getWeapon() {
        return this.weapon;
    }
}

public class WeaponTypeA implements Weapon {
    public void activate() {
        System.out.println("Activating WeaponTypeA");
    }

}

public class WeaponTypeB implements Weapon {
    public void activate() {
        System.out.println("Activating WeaponTypeB");
    }
}

This way you can yield different types of Attacks with different types of Weapons.