JAVA试题英文版(答案) .pdfVIP

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一．Whichtwodemonstratean“isa”relationship?(ChooseTwo)

A.publicinterfacePerson{}//语法错了

publicclassEmployeeextendsPerson{}

B.publicinterfaceShape{}//语法错了

publicclassEmployeeextendsShape{}

C.publicinterfaceColor{}//语法错了

publicclassEmployeeextendsColor{}

D.publicclassSpecies{}

publicclassAnimal{privateSpeciesspecies;}

E.interfaceComponent{}

ClassContainerimplementsComponent(

PrivateComponent[]children;

二．whichstatementistrue?

A.Ananonymousinnerclassmaybedeclaredasfinal

B.Ananonymousinnerclasscanbedeclaredasprivate

C.Ananonymousinnerclasscanimplementmutipleinterfaces

D.Ananonymousinnerclasscanaccessfinalvariablesinanyenclosingscope（不能）

outerclass

构造一个静态的内部类对象需要构造包含它的外部类的对象

三.Given:

1.packagefoo;

2.

3.publicclassOuter(

4.publicstaticclassInner(

5.)

6.)

Whichstatementistrue?

A.AninstanceoftheInnerclasscanbeconstructedwith“newOuter.Inner()”

B.Aninstanceoftheinnerclasscannotbeconstructedoutsideofpackagefoo

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他们都是public的，只要在外部import就行

D.

“newinner()”

四．Exhibit（展览、陈列）：

1publicclassenclosinggone{

2publicclassinsideone{}

3}

4publicclassinertest{

5publicstaticvoidmain(String[]args){

6enclosingoneeo=newenclosingone();

7//insertcodehere

8}

}

Whichstatementatline7constructsaninstanceoftheinnerclass?

A.InsideOneei=eo.newInsideOne();写程序试出来

B.Eo.InsideOneei=eo.newInsideOne();

CInsideOneei=EnclosingOne.newInsideOne();

D.EnclosingOneInsideOneei=eo.newInsideOne();

五．

1)interfaceFoo{

2)intk=0;

3)}

4)publicclassTestimplementsFoo{

5)publicstaticvoidmain(Stringargs[]){

6)inti;

7)Testtest=newTest();

8)