文章浏览阅读3.1k次。父类为抽象类,子类继承父类时,父类有的成员变量,方法,子类都有,但是,子类要重写父类里面的抽象方法。//父类public abstract class AbstractLogger { public static int INFO = 1; public static int DEBUG = 2; public static int ......
文章浏览阅读2k次,点赞7次,收藏18次。为什么父类指针可以指向子类反之则不行?例如:[cpp] view plain copyclass a {public: int aa}; class b:public a {public: int bb; } 从内存的来看如a[plain] view plain copy_父类指针为什么可以指向子类对象...
文章浏览阅读335次。java子类用父类成员函数The question is that "Can we have same data members in parent/base and child/derived classes in Java"? 问题是“在Java的父类/基类和子类/派生类中可以有相同的数据成员”吗? Yes, it is possible to have same......