Question

Java Code.

Using Decorator pattern make class BurgerToppings:

-Each topping is an extra $1 and the name provided in the constructor

-getTotalPrice: returns total price of burger + toppings

-getDetails: returns the burger name + name of topping with the word (extra)

Code:

public interface Burger{
    double C();
    String getDetails();
}

public class BigMac implements Burger{
    private String order;
    private double price ;

    public BigMac() {
        this.order= "Big Mac";
        this.price = 4.00;
    }

    @Override
    public double getPrice() {
        return price;
    }

    @Override
    public String getorder() {
        return name;
    }
}

Output expected:

Ordering BigMac + extra pickles+ extra cheese
Total price = 6.0

Answer 1

CODE :-

Burger -

BigMac -

BurgerWithToppings -

BigMacWithToppings -

Main -

OUTPUT :-

TEXT CODE :-

Burger -

public interface Burger {
   double getPrice();
   String getOrder();
}

BigMac -

public class BigMac implements Burger {

   private String order;
   private double price;

   public BigMac() {
       this.order = "Big Mac";
       this.price = 4.00;
   }

   // Method C
   @Override
   public double getPrice() {
       return price;
   }

   // Method getDetails
   @Override
   public String getOrder() {
       return order;
   }

}

BurgerWithToppings -

public abstract class BurgerWithToppings implements Burger {
  
   protected Burger burger;
  
   public BurgerWithToppings(Burger b) {
       this.burger = b;
   }

   @Override
   public double getPrice() {
       return burger.getPrice();
   }

   @Override
   public String getOrder() {
       return burger.getOrder();
   }

}

BigMacWithToppings -

public class BigMacWithToppings extends BurgerWithToppings {
  
   private String toppings[];
  
   public BigMacWithToppings(BigMac bm,String[] toppings) {
       super(bm);
       this.toppings = toppings;
   }

   @Override
   public double getPrice() {
       double tempPrice = super.getPrice();
       for(int i =0; i < this.toppings.length; i++) {
           tempPrice++;
       }
       return tempPrice;
   }

   @Override
   public String getOrder() {
       String tempName = super.getOrder();
       for(String t : this.toppings) {
           tempName += " + extra "+t;
       }
       return tempName;
   }
}

Main -

public class Main {

   public static void main(String[] args) {
      
       String toppings[] = {"pickles", "cheese"};
      
       Burger burgWidTop = new BigMacWithToppings(new BigMac(),toppings);
      
       System.out.println("Ordering "+burgWidTop.getOrder());
       System.out.println("Total Price = "+burgWidTop.getPrice());
   }

}