Design Mode: manually write an adapter and appearance mode.

Design Mode: manually write an adapter and appearance mode.

Adapter mode: converts an interface of a class to the interface that the customer expects. The adapter allows the incompatible classes to work together. There are two forms: Class adapter and Object Adapter. The former requires multiple inheritance (not supported by java), and the latter requires a combination.

Appearance mode: provides a unified and simplified interface for accessing a group of interfaces in the subsystem. The appearance defines a high-level interface to make the subsystem easier to use.

 

Adapter class diagram

 

A simple source code for the adapter:

 

Package adapter;/*** Duck interface ** @ author Arvon **/public interface Duck {public void quack (); public void fly ();}

Package adapter;/*** Turkey interface ** @ author Administrator **/public interface Turkey {public void fly (); public void goggle ();}

Package adapter;/*** a Duck disguised as a Turkey * @ author Administrator **/public class TurkeyAdapter implements Duck {private turkey Turkey; public TurkeyAdapter (turkey Turkey) {super (); this. turkey = turkey;} @ Overridepublic void quack () {// TODO Auto-generated method stubturkey. goggle () ;}@ Overridepublic void fly () {// TODO Auto-generated method stubfor (int I = 0; I <5; I ++) turkey. fly ();}}

 

 

package adapter;public class MalladDuck implements Duck {@Overridepublic void quack() {// TODO Auto-generated method stubSystem.out.println(i am quacking...);}@Overridepublic void fly() {// TODO Auto-generated method stubSystem.out.println(i am flying ...);}}

 

 

package adapter;public class WildTurkey implements Turkey {@Overridepublic void fly() {// TODO Auto-generated method stubSystem.out.println(i am flying short distance...);}@Overridepublic void goggle() {// TODO Auto-generated method stubSystem.out.println(i am goggling....);}}

 

 

Package adapter; public class AdapterTest {public static void main (String [] args) {// TODO Auto-generated method stubDuck duck = new MalladDuck (); System. out. println (duck. getClass (). getSimpleName () + says ...); testDuck (duck); // converts the Duck interface to the turkey interface duck fakeDuck = new TurkeyAdapter (new WildTurkey (); System. out. println (fakeDuck. getClass (). getSimpleName () + says ...); testDuck (fakeDuck);} private static void testDuck (Duck duck) {duck. quack (); duck. fly ();}}

Program output:

 

MalladDuck says...
I am quacking...
I am flying...
TurkeyAdapter says...
I am goggling ....
I am flying short distance...
I am flying short distance...
I am flying short distance...
I am flying short distance...
I am flying short distance...

 

Appearance pattern class diagram

 

Core code:

 

Package facade;/*** simplified interface * @ author Administrator **/public class HomeTheaterFacade {Amplifier amp; Tuner tuner; DvdPlayer dvd; CdPlayer cd; Projector projector; TheaterLights lights; screen screen; audio popper; public HomeTheaterFacade (Amplifier amp, Tuner tuner, DvdPlayer dvd, CdPlayer cd, Projector projector, TheaterLights lights, Screen screen, PopcornPopper popper) {super (); this. amp = amp; this. tuner = tuner; this. dvd = dvd; this. cd = cd; this. projector = projector; this. lights = lights; this. screen = screen; this. popper = popper;} public void watchMovie (String movie) {System. out. println (Get ready to watch a movie ...); popper. on (); popper. pop (); lights. dim (10); screen. down (); projector. on (); projector. wideScreenMode (); amp. on (); amp. setDvd (dvd); amp. setSurroundSound (); amp. setVolume (5); dvd. on (); dvd. play (movie);} public void endMovie () {System. out. println (Shutting movie theater down ...); popper. off (); lights. on (); screen. up (); projector. off (); amp. off (); dvd. stop (); dvd. eject (); dvd. off ();}}

 

 

package facade;public class FacadeTest {public static void main(String[] args) {// TODO Auto-generated method stubAmplifier amp = new Amplifier(Top-O-Line Amplifier);Tuner tuner = new Tuner(Top-O-Line AM/FM Tuner, amp);DvdPlayer dvd = new DvdPlayer(Top-O-Line DVD Player, amp);CdPlayer cd = new CdPlayer(Top-O-Line CD Player, amp);Projector projector = new Projector(Top-O-Line Projector, dvd);TheaterLights lights = new TheaterLights(Theater Ceiling Lights);Screen screen = new Screen(Theater Screen);PopcornPopper popper = new PopcornPopper(Popcorn Popper); HomeTheaterFacade homeTheater = new HomeTheaterFacade(amp, tuner, dvd, cd, projector, lights, screen, popper); homeTheater.watchMovie(Raiders of the Lost Ark);homeTheater.endMovie();}}

 

Other classes are sub-system classes.

Program output:

Get ready to watch a movie...
Popcorn Popper on
Popcorn Popper popping popcorn!
Theater Ceiling Lights dimming to 10%
Theater Screen going down
Top-O-Line Projector on
Top-O-Line Projector in widescreen mode (16x9 aspect ratio)
Top-O-Line Amplifier on
Top-O-Line Amplifier setting DVD player to Top-O-Line DVD Player
Top-O-Line Amplifier surround sound on (5 speakers, 1 subwoofer)
Top-O-Line Amplifier setting volume to 5
Top-O-Line DVD Player on
Top-O-Line DVD Player playing Raiders of the Lost Ark
Shutting movie theater down...
Popcorn Popper off
Theater Ceiling Lights on
Theater Screen going up
Top-O-Line Projector off
Top-O-Line Amplifier off
Top-O-Line DVD Player stopped Raiders of the Lost Ark
Top-O-Line DVD Player eject
Top-O-Line DVD Player off