padrão command - exemplo final

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public interface Command {
public void execute();
}
public class LightOnCommnand implements Command {
 Light light;
	
	public LightOnCommand (Light umLight) {
		This.light = umLight;
} 
	
public void execute () {
	light.on();
}
	 
}
public class GarageDoorOpenCommand implements Command {
 GarageDoor garageDoor;
	
	public GarageDoorOpenCommand (GarageDoor umGarageDoor) {
		This. garageDoor = umGarageDoor;
} 
	
public void execute () {
	garageDoor.open();
}
	 
}
Public class SimpleRemoteControl
 Command slot;
 
 Public SimpleRemoteControl() {}
 Public void set command(Command command) {
	slot = command;
 }
 Public void buttonWasPressed() {
	Slot.execute();
 }
}
	
Public class RemoteControlTest {
	Public static void main(String[] args) {
	 SimpleRemoteControl remote = new SimpleRemoteControl();
	 
 Light light = new Light();
 LightOnCommand lightOnCommand = new LightOnCommand (light);
 	 GarageDoor garageDoor = new GarageDoor();
 GarageDoorOpenCommand = new GarageDoorOpenCommand (garageDoor);
 Remote.setCommand(lightOnCommand);
	 Remote.buttonWasPressed();
 Remote.setCommand(garageDoorOpenCommand);
	 Remote.buttonWasPressed();
	 
Exercicio: implementar os controles do portao de garage para fechar e parar.