class Light
{
    protected int watts;//存放灯的瓦数
    
    protected boolean indicator;//用于标识开关
    
    Light (int watts){//含有一个参数的构造方法
        this.watts = watts;
    }
    
    Light(int watts, boolean indicator){//含有两个参数的构造方法
        this.indicator = indicator;
        this.watts = watts;
    }
    
    public void switchOn(){ //开灯，即将灯的状态置为开
        indicator = true;
    }
    
      public void switchOff(){ //关灯
          indicator = false;
      }
      
      public void printInfo(){ //输出灯的瓦数信息和开关状态
          System.out.println("the watts: "+watts+".");
          System.out.println("the indicator: "+indicator+".");
      }
}

class TubeLight extends Light
{
    private int tubeLight;//用于存放灯管儿的长度
    
    private String color;//用于存放灯管儿的颜色
    
    TubeLight(int watts, int tubeLight, String color)//带三个参数的的构造方法
    {
        super(watts);
        this.tubeLight = tubeLight;
        this.color = color;
    }
    
    public void printInfo(){ //输出灯的瓦数信息和开关状态
          super.printInfo();
          System.out.println("the tubeLight: "+tubeLight);
          System.out.println("the color: "+color);
      }
}

public class Test{//测试类
    public static void main(String[] args)
    {
        Light light = new TubeLight(32, 50, "white");
        
        light.switchOn();
        
        light.printInfo();
    }
}

------解决方案--------------------
Java code

public class Light {
    private int watts;   //（私有，整型）；//用于存放灯的瓦数；
    private boolean indicator;//（私有，布尔类型）；//用于存放灯的开或关的状态
    public Light(int watts){
        this.watts=watts;
    } //用于创建具有watts瓦的对象
    public Light(int watts,boolean indicator){
        this.watts=watts;
        this.indicator=indicator;
    } //用于创建具有watts瓦，开关状态为indicator的对象
      public void switchOn(){
          this.indicator=true;
      } //开灯，即将灯的状态置为开
      public void switchOff(){
          this.indicator=false;
      } //关灯
      public void printInfo(){
          System.out.println(this.watts+" "+this.indicator);
      } //输出灯的瓦数信息和开关状态
}