【每日日报】第二十四天
1 5.8上机练习
当父类定义为final时子类重载该函数会出现报错
1 package FuZi;
2
3 public class People {
4 void a(){System.out.println("People");}
5 }
1 package FuZi;
2
3 public class Student extends People{
4 void a(){System.out.println("Student");}
5 public static void main(String args[]){
6 People p=new Student();
7 p.a();
8 }
9
10 }
当新建 People p=new Student();
当Student p=new People();
2 没什么问题
3 明天继续看手册
