Design mode-command pattern Multi-command specific explanation

command Pattern Multi-command specific explanation

This address: Http://blog.csdn.net/caroline_wendy

Reference Command mode: http://blog.csdn.net/caroline_wendy/article/details/31379977

Specific steps:

1. multiple commands , the unused command is initialized to an empty object (Nocommand), according to the parameters (slot), select the output command.

/** * @time June 16, 2014 */package command;/** * @author C.l.wang * */public class Remotecontrol {command[] oncommands;//Open C Ommand[] Offcommands; Off public Remotecontrol () {oncommands = new command[7];offcommands = new Command[7]; Command Nocommand = new Nocommand (); for (int i=0; i<7; ++i) {//initialize oncommands[i] = nocommand;offcommands[i] = Nocommand ;}} public void SetCommand (int slot, command oncommand, command Offcommand) {This.oncommands[slot] = Oncommand;this.offcomma Nds[slot] = Offcommand;} public void onbuttonwaspushed (int slot) {oncommands[slot].execute ();} public void offbuttonwaspushed (int slot) {offcommands[slot].execute ();} Public String toString () {StringBuffer stringbuffer = new StringBuffer (); Stringbuffer.append ("\ n------Remote Control-- ----\ n "); for (int i=0; i<oncommands.length; ++i) {stringbuffer.append (" [slot "+ i +"] "+ oncommands[i].getclass (). GE Tname () + "" + Offcommands[i].getclass (). GetName () + "\ n"); return stringbuffer.tostring ();}}

2. empty Command (Nocommand) object, Inherit command interface.

Package Command;public class Nocommand implements command {public void execute () {}}

3. The test object is given a multi-command Assignment (SetCommand), which is called by the number of parameters (slot) .

/** * @time June 16, 2014 */package command;import javax.crypto.spec.ivparameterspec;/** * @author C.l.wang * */public class RemoteLoader {/** * @param args */public static void main (string[] args) {//TODO auto-generated method Stubremotecontrol Remotecontrol = new Remotecontrol (); Light livingroomlight = new Light ("Living"); Light kitchenlight = new Light ("Kitchen"); Ceilingfan Ceilingfan = new Ceilingfan ("Living"); Garagedoor Garagedoor = new Garagedoor (""); Stereo Stereo = new Stereo ("Living"); Lightoncommand Livingroomlighton = new Lightoncommand (livingroomlight); Lightoffcommand Livingroomlightoff = new Lightoffcommand (livingroomlight); Lightoncommand Kitchenlighton = new Lightoncommand (kitchenlight); Lightoffcommand Kitchenlightoff = new Lightoffcommand (kitchenlight); Ceilingfanoncommand Ceilingfanon = new Ceilingfanoncommand (Ceilingfan); Ceilingfanoffcommand Ceilingfanoff = new Ceilingfanoffcommand (Ceilingfan); Garagedooroncommand Garagedooron = new Garagedooroncommand (GaragedoOR); Garagedooroffcommand Garagedooroff = new Garagedooroffcommand (Garagedoor); Stereoonwithcdcommand STEREOONWITHCD = new Stereoonwithcdcommand (stereo); Stereooffcommand Stereooffcommand = new Stereooffcommand (stereo); Remotecontrol.setcommand (0, Livingroomlighton, Livingroomlightoff); Remotecontrol.setcommand (1, Kitchenlighton, Kitchenlightoff); Remotecontrol.setcommand (2, Ceilingfanon, Ceilingfanoff); Remotecontrol.setcommand (3, STEREOONWITHCD, Stereooffcommand); System.out.println (Remotecontrol); remotecontrol.onbuttonwaspushed (0); remotecontrol.offbuttonwaspushed (0); Remotecontrol.onbuttonwaspushed (1); remotecontrol.offbuttonwaspushed (1); remotecontrol.onbuttonwaspushed (2); Remotecontrol.offbuttonwaspushed (2); remotecontrol.onbuttonwaspushed (3); remotecontrol.offbuttonwaspushed (3);}}

4. Output:

------Remote Control------[slot 0] command. Lightoncommand    command. Lightoffcommand[slot 1] command. Lightoncommand    command. Lightoffcommand[slot 2] command. Ceilingfanoncommand    command. Ceilingfanoffcommand[slot 3] command. Stereoonwithcdcommand    command. Stereooffcommand[slot 4] command. Nocommand    command. Nocommand[slot 5] command. Nocommand    command. Nocommand[slot 6] command. Nocommand    command. Nocommandliving-Onliving-the-is-offkitchen-light-is-onkitchen-is-offliving---------ceiling fan is On highliving-ceiling fan is offliving-Stereo is onliving-stereo-is-set for CD inputliving-Stereo Me set to 11Living the stereo is off

The rest of the code download: http://download.csdn.net/detail/u012515223/7506695

Design mode-command pattern Multi-command specific explanation