Decorator Design Pattern (Wrapper)

DrinkDecorator

public abstract class DrinkDecorator extends Drink {
public Drink drink;

}

Drink

public abstract class Drink { 
    String description; 

    int cost;

    abstract int getCost();

    String getDesc() {

        return this.description;


    }


}

Vodka

public class Vodka extends Drink {

    String description = " Vodka ";

    int cost = 100;

    @Override

    int getCost() {


        return this.cost;


    }


}

OrangeJuice & like wise LemonJuice

public class OrangeJuice extends DrinkDecorator {

    String description = " fresh orenge juice ";

    int cost = 5;

    public OrangeJuice(Drink myVodka) {

        this.drink = myVodka;


    }

    @Override

    int getCost() {


        return this.cost + this.drink.getCost();


    }


}

Client Code

//Make Vodka with orange

        //make vodka

        Drink myVodka = new Vodka();


        //mix orenge and vodka


        DrinkDecorator orengeVodka= new OrangeJuice(myVodka);


        //mix lime juie in the orengeVodka


        DrinkDecorator LimeOrengeVodka= new LimeJuice(orengeVodka);


        //the cost of the final vodka should be that of lime


        //orenge and vodka cost


        System.out.println(LimeOrengeVodka.getCost());