Facade.java

// Facade
// Intent: wrap a complex subsystem with a simpler interface

class Payment
{
  public void deduct(int orderId)
  {
    System.out.println("Payment check");
  }
}


class Inventory
{
  public void check(int orderId)
  {
    System.out.println("Inventory check");
  }
}

// Facade class
class OrderFacade 
{
  private Payment payment = new Payment();
  private Inventory inventory = new Inventory();
  
  public void place(int orderId)
  {
    inventory.check(orderId);
    payment.deduct(orderId);    
  }
}


public class Main 
{
  public static void main(String[] args)
  {
    OrderFacade order = new OrderFacade();
    order.place(123123);
    System.out.println("Order completed");
  }
}