未分类题

某灯具厂商欲生产一个灯具遥控器，该遥控器具有7个可编程的插槽，每个插槽都有开关灯具的开关，现采用Command（命令）模式实现该遥控器的软件部分。Command模式的类图如图6-1所示。

【Java代码】
class Light{
public Light（　　）{}
public Light(String name){/*代码省略*/}
public void on（　　）{/*代码省略*/}//开灯
public void off（　　）{/*代码省略*/}//关灯
//其余代码省略
}
（1）{
public void execute（　　）;
}
class LightOnCommand implements Command{//开灯命令
Light light;
public LightOnCommand(Light light){this.light=light;}
public void execute（　　）{（2）;}
}
class LightOffCommand implements Command{//关灯命令
Light light;
public LightOffCommand(Light light){this.light=light;}
public void execute（　　）{（3）;}
}
class RemoteControl{//遥控器
Command[]onCommands=new Command[7];
Command[]offCommands=new Command[7];
public RemoteControl（　　）{/*代码省略*/}
public void setCommand(int slot,Command onCommand,Command offCommand){
（4）=onCommand;
（5）=offCommand;
}
public void onButtonWasPushed(int slot){
（6）;
}
public void offlButtonWasPushed(int slot){
（7）;
}
}
class RemoteLoader{
public static void main(String[]args){
RemoteControl remoteControl=new RemoteControl（　　）;
Light livingRoomLight=new Light("Living Room");
Light kitchenLight=new Light("kitchen");
LightOnCommand livingRoomLightOn=new LightOnCommand(livingRoomLight);
LightOffCommand livingRoomLightOff=new LightOffCommand(livingRoomLight);
LightOnCommand kitchenLightOn=new LightOnCommand(kitchenLight);
LightOffCommand kitchenLightOff=new LightOffCommand(kitchenLight);
remoteControl.setCommand(0,livingRoomLightOn,livingRoomLightOff);
remoteControl.setCommand(1,kitchenLightOn,kitchenLightOff);
remoteControl.onButtonWasPushed(0);
remoteControl.offButtonWasPushed(0);
remoteControl.onButtonWasPushed(1);
remoteControl.offButtonWasPushed(1);
}
}