DesignPaterns/Factory at main · DukeLuke94/DesignPaterns · GitHub

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public class Demo {
    public static void main(String[] args) {
        MilkFactory factory = new MilkFactory();
        Milkable glass = factory.getMilk(10);
        glass.makeMilk();

        Milkable bottle = factory.getMilk(5);
        bottle.makeMilk();


    }
}

class MilkFactory {
    public Milkable getMilk(int vetpercentage){
        if (vetpercentage==5){
            return new Donkey();
        }else if (vetpercentage==10){
            return new Goat();
        }else if (vetpercentage==15){
            return new Cow();
        }

        return null;
    }

}

class Cow implements Milkable{

    @Override
    public void makeMilk() {
        System.out.println("15% koemelk");

    }
}

class Goat implements Milkable{

    @Override
    public void makeMilk() {
        System.out.println("10% geitenmelk");
    }
}

class Donkey implements Milkable{

    @Override
    public void makeMilk() {
        System.out.println("5% ezelmelk");
    }
}

//////////////////////////////

public interface Milkable {
    void makeMilk();

}