抽象方法《Thinking in Java》随笔014

AbstractFather类:

1 package cn.skyfffire;
2 
3 public abstract class AbstractFather {
4     public abstract int getFive();
5 }

AbstractSon类:

1 package cn.skyfffire;
2 
3 public abstract class AbstractSon extends AbstractFather {
4     
5 }

Test:

 1 package cn.skyfffire;
 2 
 3 /**
 4  * 
 5  * @author skyfffire
 6  *
 7  */
 8 public class Test {
 9     public static void main(String[] args) {
10         AbstractFather a = new AbstractFather() {
11             public int getFive() {
12                 return 5;
13             }
14         };
15         
16         a.getFive();
17     }
18 }

1.要么在匿名类里实现抽象方法

2.要么在子类里实现抽象方法

3.要么将子类声明为抽象方法,待子类的子孙类来实现

原文地址:https://www.cnblogs.com/skyfffire/p/6484749.html