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override学习(父类和子类)
2022-08-03 22:21:00 【苗苗大佬】
想要调用子类的方法
this.say();
调用父类的方法
super.say();
super();调用父类的无参构造
重写的本质:
覆盖(范围问题,有先查到自己 ),首先找自己,再找父类
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