Character.java

/**
 * Created by IntelliJ IDEA.
 * User: ASUS
 * Date: 05.02.12
 * Time: 2:34
 * To change this template use File | Settings | File Templates.
 */
interface WeaponBehavior {
    void useWeapon();
}

public abstract class  Character {
    protected WeaponBehavior weapon;

    abstract void fight();

    void changeWeapon(WeaponBehavior weapon) { this.weapon = weapon; }

    public static void main(String[] args) {
        King king = new King();
        king.fight();

        king.changeWeapon(new BowAndArrowBehavior());
        king.fight();
    }
}

class King extends Character {

    King() { weapon = new SwordBehavior(); }

    public void fight() { weapon.useWeapon(); }
}
class Queen extends Character {
    
    Queen() { weapon = new KnifeBehavior(); }
    
    public void fight() { weapon.useWeapon(); }
}
class Knight extends Character { 
    
    Knight() { weapon = new AxeBehavior(); }
    
    public void fight() { weapon.useWeapon(); }
}
class Troll extends Character {
    public void fight() {}
}




class KnifeBehavior implements WeaponBehavior {
    public void useWeapon() { System.out.println("Knife"); }
}
class BowAndArrowBehavior implements WeaponBehavior {
    public void useWeapon() { System.out.println("BowAndArrow"); }
}
class AxeBehavior implements WeaponBehavior {
    public void useWeapon() { System.out.println("Axe"); }
}
class SwordBehavior implements WeaponBehavior {
    public void useWeapon() { System.out.println("Sword");}
}