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What design pattern is suitable to add new features to an existing object?

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Pragya Keshap answered on February 10, 2023 Popularity 1/10 Helpfulness 1/10

answer What design pattern is suitable to add new features to an existing object?

What design pattern is suitable to add new features to an existing object?

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We can use Decorator design pattern to add new features to an

existing object. With a Decorator we work on same object and

return the same object with more features. But the structure of the

object remains same since all the decorated versions of object

implement same interface.

public class DecoratorPatternDemo {
   public static void main(String[] args) {

      Shape circle = new Circle();

      Shape redCircle = new RedShapeDecorator(new Circle());

      Shape redRectangle = new RedShapeDecorator(new Rectangle());
      System.out.println("Circle with normal border");
      circle.draw();

      System.out.println("\nCircle of red border");
      redCircle.draw();

      System.out.println("\nRectangle of red border");
      redRectangle.draw();
   }
}

https://www.tutorialspoint.com/design_pattern/decorator_pattern.htm#:~:text=Decorator%20pattern%20allows%20a%20user,a%20wrapper%20to%20existing%20class.

Popularity 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: add java

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