English
- package com.company.section4;
- /**
- * @author cbf4Life cbf4life@126.com
- * I'm glad to share my knowledge with you all.
- */
- public abstract class Product {
- //甭管是什么产品它总要是能被生产出来
- public abstract void beProducted();
- //生产出来的东西，一定要销售出去，否则亏本呀
- public abstract void beSelled();
- }
