Command Design Pattern

The objective of this exercise is to implement the command design pattern.

Answer Question $1$ to $7$

First, we'll create our command interface:

Now let's create two concrete commands. One will turn on the lights, another turns off lights:

Light is our receiver class, so let's set that up now:

Following the step $2$ and $3,$ create commands for the GarageDoorOpenCommand and

GarageDoorCloseCommand, and the receiver GarageDoor

Our invoker in this case is the remote control.

set up a client to use the invoker

$//$Client

public class client$\}$

public static void main$($String$[]$ args$)\{$

RemoteContral control $=$ new RemoteControl $()$;

Light light $=$ new Light $()$;

Command lightsOn $=$ new LightsOnCommand$($light$)$;

Command lightsOff $=$ new LightsOffCommand$($light$)$;

GarageDoor garageDoor $=$ new GarageDoor $()$;

Command garageDoorOpen $=$ new GarageDoorOpenCommand $($garageDoor$)$ ;

Command garageDoorClose $=$ new GarageDoorCloseCommand $($garageDoor$)$;

$//$switch on

control.setcommand $(1$ightsOn$)$;

control.pressButton$()$;

$//$switch off

control.setCommand $($lightsOff$)$;

control.pressButton$()$;

$//$switch on

control.setcommand $($garageDoorOpen$)$;

control.pressButton$()$;

$//$switch off

control.setcommand $($garageDoorClose$)$;

control.pressButton$()$;

$\}$

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