软件开发技术-类和继承二

773011821 Teaching

Teaching22

讲讲2Transition

基类的成员③编译时多态和运行时多态 31基类的成1 41基类的成1 class

publicstringField1="SomeClass publicvoidMethod1(string ine("SomeClass.Method1:{0}", 9 classOtherClass: publicnewstringField1="OtherClass publicnewvoidMethod1(string ine("OtherClass.Method1:{0}", class staticvoid OtherClassoc=new 5Transition

基类的成员③编译时多态和运行时多态 6221classMyBaseClass{...2

3classMyDerivedClass:MyBaseClass{...45 6class 77 staticvoid{MyDerivedClassderived=new=}} 722 8221class2{3virtualpublicvoid4{5Console.Wriine("Thisisbase6}7}89classMyDerivedClass:{overridepublicvoid{Console.Wriine("Thisisderivied}}class{staticvoid{MyDerivedClassderived=newMyBaseClassmybc=(MyBaseClass)}}922 22 Transition

基类的成员③编译时多态和运行时多态 33，”（Ieace）（Composition）来实现。继承概念的实现方式有二类：实现继承与接口继承。实现继承是指直接使用基的属性和方法而无需。（）可以通过相同的方式予以调用。33 基类修饰 派生类修饰 含编译时多

运行时多 331class1classclass2{{3publicvoidstaticvoid4{Console.Wri}{5publicvirtualvoidAa=new6{Console.Wri}7publicvirtualvoid8{Console.Wri}9}Ab=newclassB:{publicnewvoid{Console.Wri}Bc=newpublicoverridevoid{Console.Wri}publicoverridevoid{Console.Wri}}Ad=newclassC:{publicnewvoid}{Console.Wri}}publicoverridevoid{Console.Wri}publicvoid{Console.Wri}}Transition

基类的成员③编译时多态和运行时多态 12publicvoid12publicvoidPrintStuff(stringspublicintMyProperty{get;set;4 4抽象成4Transition

基类的成员③编译时多态和运行时多态 5抽象5 classMyClass{...5抽象51class2{3publicvoid4{ ine("Iam publicvoid 9 classDerivedClass: overridepublicvoid ine("Iam class staticvoid

//AbClassa=new//DerivedClassb=newDerivedClass();}

5抽象5 class class publicintSideLength= staticvoidMain(string[]args constintTriangleSideCount= MyClassmc=new publicvoidPrintStuff(string mc.PrintStuff("Thisisastring." publicintMyInt{get;set; mc.MyInt= Console.Wri ine(mc.MyInt publicint ine(mc.PerimeterLength() returnTriangleSideCount*

classMyClass: publicoverridevoidPrintStuff(

} } publicoverrideintMyInt{get;set; Transition

基类的成员③编译时多态和运行时多态 6密封611sealedclassMyClass{...Transition

基类的成员③编译时多态和运行时多态 7静态7静态类是标记为static静态1staticpublic1staticpublicclass23456789{}publicstaticfloatPI=3.14f;publicstaticboolIsOdd(int{returnx%2==}publicstaticintTimes2(intx){retur