참가자들

암호

public class Main {

    public static void main(String[] args) {
        int extrinsicstate = 22;
        FlyweightFactory factory = new FlyweightFactory();
        Flyweight fx = factory.getFlyweight("X");
        fx.operation(--extrinsicstate);
        Flyweight fy = factory.getFlyweight("Y");
        fy.operation(--extrinsicstate);
        Flyweight fz = factory.getFlyweight("Z");
        fz.operation(--extrinsicstate);
        UnsharedConcreteFlyweight fu = new UnsharedConcreteFlyweight();
        fu.operation(--extrinsicstate);
    }
}

public class FlyweightFactory {
    private Hashtable<String, Flyweight> flyweights = new Hashtable<>();

    public FlyweightFactory() {
        flyweights.put("X", new ConcreteFlyweight());
        flyweights.put("Y", new ConcreteFlyweight());
        flyweights.put("Z", new ConcreteFlyweight());
    }

    public Flyweight getFlyweight(String key) {
        return ((Flyweight) flyweights.get(key));
    }
}

public interface Flyweight {
    void operation(int extrinsicstate);
}

public class ConcreteFlyweight implements Flyweight {

    @Override
    public void operation(int extrinsicstate) {
        System.out.println("ConcreteFlyweight: " + extrinsicstate);
    }
}

public class UnsharedConcreteFlyweight implements Flyweight {

    @Override
    public void operation(int extrinsicstate) {
        System.out.println("UnsharedConcreteFlyweight: " + extrinsicstate);
    }
}

산출

ConcreteFlyweight: 21
ConcreteFlyweight: 20
ConcreteFlyweight: 19
UnsharedConcreteFlyweight: 18

eidherjulian61 / 디자인 패턴