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 offButtonWasPushed(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);
    }
}