publicclassX{publicobjectm(){objecto=newfloat(3.14F);objectoa=newobject[1];oa[0]=o;o=null;oa[0]=null;returno;}}Whenisthefloatobjectcreatedinline3,eligibleforgarbagecollection?()A.Justafterline5.B.Justafterline6.C.Justafterline7.D.Justafterline8（thatis，ast

题目
publicclassX{publicobjectm(){objecto=newfloat(3.14F);objectoa=newobject[1];oa[0]=o;o=null;oa[0]=null;returno;}}Whenisthefloatobjectcreatedinline3,eligibleforgarbagecollection?()

A.Justafterline5.

B.Justafterline6.

C.Justafterline7.

D.Justafterline8（thatis，asthemethodreturns）.

相似考题

1.表达式LEN(SPACE(O))的运算结果是( )A、NULL.B、1C、0D、″″E、2

2.publicclassX{2.publicobjectm(){3.objecto=newfloat(3.14F);4.object[]oa=newobject[1];5.oa[0]=o;6.o=null;7.oa[0]=null;10.returno;9.}10.}Whenisthefloatobjectcreatedinline3,eligibleforgarbagecollection?()A.Justafterline5.B.Justafterline6.C.Justafterline7.D.Justafterline8（thatis，asthemethodreturns）.

3.publicclassX(2.publicobjectm(){3.objecto=newfloat(3.14F);4.object[]oa=newobject[1];5.oa[0]=o;6.o=null;7.returnoa[0];8.}9.}Whenisthefloatobjectcreatedinline3,eligibleforgarbagecollection?()A.Justafterline5B.Justafterline6C.Justafterline7（thatis，asthemethodreturns）D.Neverinthismethod.

4.1.public class GC{2.private Objec to；3.private void doSomethingElse（Object obj）{o=obj；}4.public void doSomething（）{5.Object o=new Object（）；6.doSomethingElse（o）；7.o=new Object（）；8.doSomethingElse（null）；9.o=null；10.}11.}When the doSomething method is called，after which line does the Object created in line 5 become available for garbage collection？（）A.Line5B.Line6C.Line7D.Line8E.Line9F.Line10

更多“publicclassX{publicobjectm(){objecto=newfloat(3.14F);objectoa=newobject[1];oa[0]=o;o=null;oa[0]=null;returno;}}Whenisthefloatobjectcreatedinline3,eligibleforgarbagecollection?() ”相关问题

  • 第1题：

    publicObjectm(){11.Objecto=newFloat(3.14F);12.Object[]oa=newObject[1];13.oa[0]=o;14.o=null;15.returnoa[0];16.}WhenistheFloatobject,createdinline11,eligibleforgarbagecollection?()

    A.Justafterline13.

    B.Justafterline14.

    C.Neverinthismethod.

    D.Justafterline15（thatis，asthemethodreturns）.


    参考答案：C
    ThecorrectanswertothisquestionisC.Theobjectisnevergarbagecollectedsimplybecausethemethodreturnsit.Thinkaboutit,themessagethatreceivestheobjectmightdependonitsoitmustbesurethattheobjectreceivedbythemethodwontbegarbagecollected.Onlyinthissituationalocalobjectwontbeeligibleforgarbagecollection.Otherwise,alocalobjectiseligibleforgarbagecollectionassoonasthemethodends.

  • 第2题：

    return o; O是代表什么呢?如果不返回O 会怎么样?

    friend ostream& 

    operator<<(ostream&o,const Vector&v){

    for(int i=0; i<v.size; i++){

    o << v.data[i] << ' ';

    }

    return o;

    }


    ostream& o //o 是ostream的一个引用
    你的函数定义了返回类型为ostream&，自然要返回o，否则无法编译。

  • 第3题：

    下面的程序会抛出什么异常类型？ public class Test { public static void main（String[] args) { Object o = null; System.out.println（o.toString（)); } }

    A．ArrayIndexOutOfBoundsException

    B．StringIndexOutOfBoundsException

    C．ClassCastException

    D．NullPointerException


    E

  • 第4题：

    publicclassX{publicobjectm(){objecto=newfloat(3.14F);objectoa=newobject[1];oa[0]=o;o=null;returnoa[0];}}Whenisthefloatobjectcreatedinline3,eligibleforgarbagecollection?()

    A.Justafterline5

    B.Justafterline6

    C.Justafterline7（thatis，asthemethodreturns）

    D.Neverinthismethod.


    参考答案：D

  • 第5题：

    下面的程序会抛出什么异常类型？ public class Test { public static void main（String[] args) { Object o = null; System.out.println（o); } }

    A．ArithmeticException

    B．ArrayIndexOutOfBoundsException

    C．StringIndexOutOfBoundsException

    D．没有异常


    E

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