CareerCup

Class ICommand
	execute();
//All command flags should be listed here, 
//execute method will work on the basis
//of flag value
enum CommandTypes
	POWER_OFF,
	POWER_ON,
	-
	-
Class  Command implements ICommand
	up()
	down()
	off()
	on()
Class VideoCommand extends  Command
	changeVideoSettings();
Class AudioCommand extends  Command
	changeAudioSettings();
public class Button 
	Command c; 
        Button(Command c);
	click(); // Click will execute command
Class Remote
	Button videoButton;
	Button audioButton;

	powerOn();
	powerOff();

Remote newRemote = new Remote();
Button newButton = new Button(color, name);
Battery newBattery = new Battery(someVolt);
//changes the battery
newRemote.updateBatteries(newBattery);
//add a button to its internal hashmap that has name associated with buttons.
newRemote.addButton(newButton);
//to press a button on remote you can say
newRemote.getButton("power").execute();
So the above end code will tell you that you need a Button class, a Battery class.
To take it further. The Button class can have a execute() function. Battery could have getRemainingPower() function.

Base class button{
//common setters and getter variables
//common methods declared abstract and called virtually
}
class channel extends button {

//channel specific getters and setters and methods
}

class volume extends button {

//volume specific getters and setters and methods
}
class power extends button{

//power specific getters and setters and methods
}

//Not sure of the below two.
class battery{
}

class remote{
}

Classes you could have are..Also you could follow the Observer pattern..

/**
*All actions are funneled through this class..gets the actionStr and publishes it..
*/

class Remote implements Observable { make,model,.. , List<Button>, publish() }

class Button { name, actionStr }

/**
Set of common actions in the Action class and Controller also observes the changes to button's state (which is published by Remote)
*/
class Controller extends Action implements Observer { .. sendSignals() {..} }

Implement Command Design pattern

Remote control for what? What is the scenario?

Is it a remote controller for an alarm clock for the deaf, by any chance?

Remote controller for him ... was he going to control himself with the remote ?