data/test/Hugo-Gao/Design-pattern/CommandPattern/src/SimpleSlot/LightOffCommand.java

package SimpleSlot;

/**
 * Created by Administrator on 2017/6/19.
 */
public class LightOffCommand implements Command
{
    Light light;

    public LightOffCommand(Light light)
    {
        this.light = light;
    }

    @Override
    public void execute()
    {
        light.off();
    }

    @Override
    public void undo()
    {
        light.on();
    }
}