java试题库程序分析题挑选好最终.doc

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1、难度级别：3知识点：继承（5-4）试题内容：classArt{Art(){System.out.println("Artconstructor");}}classDrawingextendsArt{Drawing(){super();System.out.println("Drawingconstructor");}}publicclassCartoonextendsDrawing{Cartoon(){super();System.out.println("Cartoonconstructor");

2、}publicstaticvoidmain(String[]args){Cartoonx=newCartoon();}}难度级别：3知识点：继承（5-4）试题内容：classGame{Game(inti){System.out.println("Gameconstructor");}}classBoardGameextendsGame{BoardGame(inti){super(i);System.out.println("BoardGameconstructor");}}publicclassCh

3、essextendsBoardGame{Chess(){super(11);System.out.println("Chessconstructor");}publicstaticvoidmain(String[]args){Chessx=newChess();}}难度级别：3知识点：继承（5-4）试题内容：classVehicle{publicvoiddrive(){System.out.println("Vehicle:drive");}}classCarextendsVehicle{publi

4、cvoiddrive(){System.out.println("Car:drive");}}publicclassTest{publicstaticvoidmain(Stringargs[]){Vehiclev=newVehicle();Carc=newCar();v.drive();c.drive();v=c;v.drive();}}难度级别：3知识点：构造函数的重载（5-3）试题内容：写出下面程序的输出结果classC0{publicC0(intx){System.out.println("C

5、0"+x);}C0(){System.out.println("C0");}}classC1extendsC0{publicC1(intx){System.out.println("C1"+x);}publicstaticvoidmain(Stringargs[]){newC1(1);}}难度级别：3知识点：构造函数的重载（5-3）3、试题内容：写出下面程序的输出结果classParent{Parent(){System.out.println("调用父类的parent()构造方法");}}clas

6、sSubParentextendsParent{SubParent(){System.out.println("调用子类的SubParent()构造方法");}}publicclassSubroutineextendsSubParent{Subroutine(){System.out.println("调用子类的Subroutine()构造方法");}publicstaticvoidmain(String[]args){Subroutines=newSubroutine();}}难度级别：3知识点：

7、构造函数的重载（5-3）试题内容：classTest{publicstaticintMAX=100;Test(){System.out.println("调用无参构造方法");}Test(inti){System.out.println("调用有参构造方法");}publicintf(inta){returna+Test.MAX;}publicintf(inta,intb){returna+b;}}publicclassTestDemo{publicstaticvoidmain(Stringargs

8、[]){System.out.println(Test.MAX);Testt1=newTest();System.out.println(t1.f(10,20));Testt2=newTest(10);System.out.println(t2.f(10));}}难度级别：3知识点：构造函数（4-1）试题内容：查看下列程序并指出其输出结果。classA{publicA(){System.out.println("Aiscalled");}}classBextendsA