摘要: //测试类 public class Dynamic { public static void main(String[] args) { A a = new B(); System.out.println(a.sum()); System.out.println(a.sum1()); } } cl 阅读全文
posted @ 2022-02-07 15:15 香草ovo 阅读(32) 评论(0) 推荐(0) 编辑