public abstract class Coffee {
    protected ICoffeeAdditives additives;

    public Coffee(ICoffeeAdditives additives) {
        this.additives = additives;
    }
    void addSomething(){
        additives.addSomething();
    }
    public abstract void makeCoffee();
}

//大杯
public class LargeCoffee extends Coffee{

    public LargeCoffee(ICoffeeAdditives additives) {
        super(additives);
    }

    @Override
    public void makeCoffee() {
        additives.addSomething();
        System.out.println("大杯");
    }
}
//中杯
public class MediumCoffee extends Coffee {
    public MediumCoffee(ICoffeeAdditives additives) {
        super(additives);
    }

    @Override
    public void makeCoffee() {
        additives.addSomething();
        System.out.println("中杯");
    }
}

public interface ICoffeeAdditives {

    /**
     * 添加
     */
    void addSomething();
}

public class Milk implements ICoffeeAdditives {
    @Override
    public void addSomething() {
        System.out.println("加奶");
    }
}
public class Sugar implements ICoffeeAdditives{

    @Override
    public void addSomething() {
        System.out.println("加糖");
    }
}
    

public class App {
    public static void main(String[] args) {
        Coffee largeCoffee = new LargeCoffee(new Sugar());
        largeCoffee.makeCoffee();
    }
}