Java每日一题20170116

因改版后无法添加扩展链接，20170113问题解析请到公众号查看，问题解析在公众号首发，公众号ID：weknow619。

package Jan2017;

public class Ques0116 {
    public static void main(String[] args) {
        System.out.println(new BigDog("大黑狗", "黑色"));
    }
}

class Dog{
    
    String name;
    
    public Dog(String name) {
        super();
        this.name = name;
    }
    
    public String toString(){
        return "name:"+name;
    }
}

class BigDog extends Dog{

    String color;
    
    public BigDog(String name, String color) {
        this.name = name;
        this.color = color;
    }
    
    public String toString(){
        return "name:"+name+", color:"+color;
    }
}

今日问题：
请问主程序输出结果是什么？