Facade پترن در جاوا (Design Pattern)

public interface Shape {
     void draw();
}

public class Circle implements Shape {

     @Override
     public void draw() {
          System.out.println("Circle::draw()");
     }
}

public class Rectangle implements Shape {

   @Override
   public void draw() {
      System.out.println("Rectangle::draw()");
   }
}

public class Square implements Shape {

     @Override
     public void draw() {
          System.out.println("Square::draw()");
     }
}

public class ShapeMaker {
     private Shape circle;
     private Shape rectangle;
     private Shape square;

     public ShapeMaker() {
          circle = new Circle();
          rectangle = new Rectangle();
          square = new Square();
     }

     public void drawCircle() {
          circle.draw();
     }

     public void drawRectangle() {
          rectangle.draw();
     }

     public void drawSquare() {
          square.draw();
     }
}

public class FacadePatternDemo {
     public static void main(String[] args) {
          ShapeMaker shapeMaker = new ShapeMaker();

          shapeMaker.drawCircle();
          shapeMaker.drawRectangle();
          shapeMaker.drawSquare();
     }
}