light.java~1~

来自「《深入浅出设计模式》的完整源代码」· JAVA~1~ 代码 · 共 11 行

package testcommand;

public class Light {
  public void turnOn () {
    System.out.println ("Light is on ");
  }

  public void turnOff () {
    System.out.println ("Light is off");
  }
}