Simple Bowling Secretary

The Facade Pattern provides a unified interface to a set of interfaces in a subsystem. Facade defines a higher level interface that makes the subsystem easier to use.

An example of the Facade Design Pattern follows:

public class Television {
	public void on() { ... }
	public void off() { ... }
	public void channelUp { ... }
	public void channelDown() { ... }
}
public class DVD {
	public void on() { ... }
	public void off() { ... }
	public void play() { ... }
	public void pause() { ... }
}
public class Receiver {
	public void on() { ... }
	public void off() { ... }
	public void volumeUp() { ... }
	public void volumeDown() { ... }
	public void inputDVD() { ... }
	public void inputTuner() { ... }
}
public class FacadeExample {
	Television tv;
	DVD dvd;
	Receiver receiver;
	
	//  Combine many actions/different objects into a simpler interface
	public void watchMovie(String movieName) {
		tv.on();
		dvd.on();
		receiver.on()
		receiver.inputDVD();
		receiver.volumeUp();
		dvd.play();
	}
	
	public void endMovie() {
		dvd.off();
		receiver.off();
		tv.off();
	}
}

Design Patterns

Facade Pattern

© Copyright 2010-2013 Hayward Hulick, All rights reserved.