继承 C#中,创建派生类要在派生类的名字后面加上冒号,后面再跟上基类的名字: public class ListBox : Control 提示:C++程序员注意了,C#没有私有或者保护继承 多态 继承又两个功能强大的方面.其一是代码重用,创建ListBox类时,可以重用基类Control中的某些逻辑.另一方面就是多态性. 举一个多态的例子: 当电话公司向某个电话发送一个响铃信号时,它并不知道电话线另一头是什么类型的电话.也许是老式的手摇电话,要自己生电响铃,也许是可以演奏数字音乐的电子电话.…

public class SoldierDemo { public static void main(String[] args) { /*Soldier test1=new Army("张三"); test1.action(); Soldier test2=new Navy("李四"); test2.action();*/ Officer test=new Officer("许三多"); test.allcommand(); System.ou…

https://msdn.microsoft.com/en-us/library/ms173152.aspx Polymorphism is often referred to as the third pillar of object-oriented programming, after encapsulation and inheritance.  面向对象编程的三个特性:封装,继承,多态 Polymorphism is a Greek word that means "many-shap…

This appendix contains suggestions to help guide you in performing low-level program design and in writing code.Naturally, these are guidelines and not rules. The idea is to use them as inspirations and to remember that there are occasional situation…

https://msdn.microsoft.com/en-us/library/ms173156.aspx An interface contains definitions for a group of related functionalities that a class or a struct can implement. By using interfaces, you can, for example, include behavior from multiple sources…

In this chapter I present classes to represent playing cards, decks of cards, and poker hands.If you don't play poker, you can read about it at http://en.wikipedia.org/wiki/Poker, but you don’t have to; I’ll tell you what you need to know for the exe…

The C# language is designed so that versioning between base and derived classes in different libraries can evolve发展 and maintain backward compatibility向后兼容. This means, for example, that the introduction of a new member in a base class with the same…

作为IT学生以及将来打算从事IT行业的人, 我们在开发时少不了要去阅读英文文档, 在面试及工作中也会涉及到相关的英文词汇, 因此具备一定的英语水准是必须的. 这里我就把我在学习中所遇到的英文词汇记录下来, 不定期更新: 编程: Object-oriented programming (OOP) - 面向对象编程 enncapsulation - 封装, inheritance - 继承, polymorphism - 多态  [这就是OOP三大特性了] generic - 泛型 wildcard…

pingback :http://java.sys-con.com/node/84633?page=0,1 Object-oriented design is like an alloy consisting of a solid grounding in the object-oriented (OO) approach and implementing the best OO practices heavily laced with how to sidestep the OO pitfal…

     UML基础介绍 1.UML的定义 统一建模语言(UML)是一种图形化的语言,它可以帮助我们在OOAD过程中标识元素.构建模块.分析过程并可通过文档说明系统中的重要细节 2.OOAD OOAD是根据OO的方法学,对软件系统进行分析和设计的过程 -- OOA 分析阶段 -- OOD 设计阶段 3.面向对象 面向对象( Object-Orientation ,简称OO)是一种系统建模技术 面向对象编程( Object-Orientation Programming,简称OOP)是按照OO…