多态练习 

1 public class Fu {
2     int num = 3;
3     void show() {
4         System.out.println("F1");
5     }
6     static void method() {
7         System.out.println("F2");
8     }
9 }
 1 public class Zi extends Fu{
 2     int sum = 4;
 3     
 4     void show() {
 5         System.out.println("Z1");
 6     }
 7     
 8     static void method() {
 9         System.out.println("Z2");
10     }
11 }
1 public class DouTaiDemo {
2     public static void main(String[] args) {
3         Fu f = new Zi();
4         System.out.println(f.num);
5         f.show();
6         f.method();
7     }
8     
9 }

 

posted on 2018-06-05 20:50  冷小超  阅读(139)  评论(2)    收藏  举报

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