Design mode: Manually write an adapter and appearance mode yourself

Adapter mode: the interface of a class is transformed into the interface that the client expects, and the adapter makes the incompatible classes work together. There are two kinds of forms: Class adapters and Object adapters. The former requires multiple inheritance (Java does not support), which uses a combination.

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

Class diagram of the adapter

A simple source for the adapter:

Package adapter;/** * Duck interface * @author Arvon * */public interface Duck {public void quack ();p ublic void Fly ();

Package adapter;/** * Turkey interface * @author Administrator * */public interface Turkey {public void Fly ();p ublic 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 stubs Ystem.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 stubs Ystem.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 D UCK = new Malladduck (); System.out.println (Duck.getclass (). Getsimplename () + "says ..."); Testduck (duck);//Convert Duck interface to 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 ();d uck.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; Popcornpopper 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 ...");p Opper.on ();p opper.pop (); Lights.dim, Screen.down ();p rojector.on ();p rojector.widescreenmode (); Amp.on (); Amp.setdvd (DVD);  Amp.setsurroundsound (); Amp.setvolume (5);d Vd.on ();d vd.play (movie); public void Endmovie () {System.out.println ("shutting movie theater down ...");p Opper.off (); Lights.on (); Screen.up (); Projector.off (); Amp.off ();d vd.stop ();d vd.eject ();d Vd.off ();}

Package Facade;public class Facadetest {public static void main (string[] args) {//TODO auto-generated method Stubamplifie R amp = new Amplifier ("top-o-line amplifier"); Tuner Tuner = new Tuner ("Top-o-line AM/fm Tuner", AMP);D vdplayer 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 screens ("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 ();}}

The other classes are subsystems of the class that are not posted here.

Output of the program:

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

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Design mode: Manually write an adapter and appearance mode yourself