DQ2020的专栏

1.动物类package com.nice.dq2020.fanxing; public class Animal { @Override public String toString() { return "I am an animal!"; } }2.老虎类继承动物类package com.nice.dq2020.fanxing; public c...

接着上一篇：https://blog.youkuaiyun.com/danqi1989/article/details/79903262泛型可不可以泛个List?直接上测试类：public class Test { public static void main(String[] args) { //泛型变成 List<Animal> //注意:这里的L...