FacadePatternDemo.java

Circle.java

public class Circle implements Shape {

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

FacadePatternDemo.java

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

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

Rectangle.java

public class Rectangle implements Shape {

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

Shape.java

public interface Shape {
   void draw();
}

ShapeMaker.java

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();
   }
}

Square.java

public class Square implements Shape {

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

Circle, Rectangle and Square are all implementations of Shape.
The ShapeMaker is the Facade to all the Shapes. FacadePatternDemo class shows how the Facade can be used to draw different shapes.
Read more? : https://www.tutorialspoint.com/design_pattern/facade_pattern.htm