[你必须知道的.NET] 第二回:对抽象编程:接口和抽象类
发布时间:2020-12-15 21:11:59 所属栏目:asp.Net 来源:网络整理
导读:div style="FONT-SIZE: 10pt" 什么是接口? 什么是抽象类? ///?定义抽象类///? abstract?public?class?Animal{????//定义静态字段????static?protected?int?_id;?????//定义属性????public?abstract?static?int?Id????{????????get;????????set;????}?????/
<div style="FONT-SIZE: 10pt">
????public?interface?System.IComparable????{????????int?CompareTo(object?o);????}????public?class?TestCls:?IComparable????{????????public?TestCls()????????{????????}?????????private?int?_value;????????public?int?Value????????{????????????get?{?return?_value;?}????????????set?{?_value?=?value;?}????????}?????????public?int?CompareTo(object?o)????????{????????????//使用as模式进行转型判断????????????TestCls?aCls?=?o?as?TestCls;????????????if?(aCls?!=?null)????????????{????????????//实现抽象方法????????????return?_value.CompareTo(aCls._value);????????????}????????}????}
///?
????public?class?Duck?:?Animal,?IAction????{????????public?Duck(string?name)????????{????????????_name?=?name;????????}????????//重载抽象方法????????public?override?void?Show()????????{????????????Console.WriteLine(_name?+?"?is?showing?for?you.");????????}????????//重载抽象属性????????public?override?string?Name????????{????????????get?{?return?_name;}????????}????????//实现接口方法????????public?void?Move()????????{????????????Console.WriteLine("Duck?also?can?swim.");????????}????}????public?class?Dog?:?Animal,?IAction????{????????public?Dog(string?name)????????{????????????_name?=?name;????????}????????public?override?void?Show()????????{????????????Console.WriteLine(_name?+?"?is?showing?for?you.");????????}????????public?override?string?Name????????{????????????get?{?return?_name;?}????????}????????public?void?Move()????????{????????????Console.WriteLine(_name?+?"?also?can?run.");????????}????}
????public?class?TestAnmial????{????????public?static?void?Main(string?[]?args)????????{????????????Animal?duck?=?new?Duck("Duck");????????????duck.MakeVoice();????????????duck.Show();????????????Animal?dog?=?new?Dog("Dog");????????????dog.MakeVoice();????????????dog.Show();????????????IAction?dogAction?=?new?Dog("A?big?dog");????????????dogAction.Move();????????}????}
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