多态的编译，成员变量，运行编译看左边，成员方法运行看右边 

package com.ZZ.z1;

    class Fu {
        int num = 4;
        void show() {
            System.out.println("showFu");
        }
    }

    class Zi extends Fu {
        int num = 5;

        void show() {
            System.out.println("showZi");
        }
    }

    class T {
        public static void main(String[] args) {
            Fu f = new Zi();
            Zi z = new Zi();
            System.out.println(f.num);
            System.out.println(z.num);
            f.show();
            z.show();
        }
    }

posted @ 2022-05-24 16:31  小松2739  阅读(30)  评论(0)  编辑  收藏  举报