packagetest1;publicclassTest1{staticintx=42;}packagetest2;publicclassTest2extendstest1.Test1{publicstaticvoidmain(String[]args){System.out.println(x=＋x);}}Whatistheresult?()A.x=0B.x=42C.Compilationfailsbecauseofanerrorinline2ofclassTest2.D.Compilationfail

题目
packagetest1;publicclassTest1{staticintx=42;}packagetest2;publicclassTest2extendstest1.Test1{publicstaticvoidmain(String[]args){System.out.println(x=＋x);}}Whatistheresult?()

A.x=0

B.x=42

C.Compilationfailsbecauseofanerrorinline2ofclassTest2.

D.Compilationfailsbecauseofanerrorinline3ofclassTest1.

E.Compilationfailsbecauseofanerrorinline4ofclassTest2.

相似考题

1.classTestMain{staticintx=2;static{x=4;}publicstaticvoidmain(String...args){inty=x＋1;System.out.println(y);}}和命令行:javaTestMain结果为:()A.3B.5C.编译失败D.运行时异常被抛出

2.现有:classTestMain{staticintx=2;static{x=4;}publicstaticvoidmain(String...args){inty=x＋1;System.out.println(y);}}和命令行:javaTestMain结果为:()A.3B.5C.编译失败D.运行时异常被抛出

3.现有:classTop{staticintX=l;publicTop(){x*=3;}}classMiddleextendsTop{publicMiddle(){x＋=l;}publicstaticvoidmain(String[]args){Middlem=newMiddle();System.out.println(x);}}结果是什么?()A.2B.3C.4D.编译失败

4.classTop{staticintx=1;publicTop(inty){x*=3;}}classMiddleextendsTop{publicMiddle(){x＋=1;}publicstaticvoidmain(String[]args){Middlem=newMiddle();System.out.println(x);}}结果为:()A.1B.2C.3D.编译失败

更多“packagetest1;publicclassTest1{staticintx=42;}packagetest2;publicclassTest2extendstest1.Test1{publicstaticvoidmain(String[]args){System.out.println(x=＋x);}}Whatistheresult?() ”相关问题

  • 第1题：

    现有:classTop{staticintx=l;publicTop(inty){x*=3;}}classMiddleextendsTop{publicMiddle(){x＋=1;)publicstaticvoidmain(String[]args){Middlem=newMiddle();System.out.println(x);}}结果为:()

    A.1

    B.2

    C.3

    D.编译失败


    参考答案：D

  • 第2题：

    publicclassTest{privatestaticint[]x;publicstaticvoidmain(String[]args){System.out.println(x[0]);}}Whatistheresult?()

    A.0

    B.null

    C.Compilationfails.

    D.ANullPointerExceptionisthrownatruntime.

    E.AnArrayIndexOutOfBoundsExceptionisthrownatruntime.


    参考答案：D

  • 第3题：

    publicclassTest{publicstaticvoidmain(String[]args){intx=0;assert(x>0):“assertionfailed”;System.out.println(“finished”);}}Whatistheresult?()

    A.finished

    B.Compilationfails.

    C.AnAssertionErroristhrown.

    D.AnAssertionErroristhrownandfinishedisoutput.


    参考答案：A

    Thisquestionisabittrickybecauseitlacksthefollowinginformation:Itshouldincludeastatementthatsayswhetherornotassertionsareenabled.Iftheyareindeedenabled,the
    correctionanswerisC.butiftheyarenot,thecorrectanswerisA.Assertionsarenotenabledbydefaultsoifthequestionisnotchanged,themostlogicalanswerisA.

  • 第4题：

    publicstaticvoidmain（String[]args）{try{args=null；args[0]=test”；System.out.println（args[0]）；}catch（Exceptionex）{System.out.println（”Exception”）；}catch（NullPointerExceptionnpe）{System.out.println（”NullPointerException”）；}}Whatistheresult？（）

    A.test

    B.Exception

    C.Compilationfails.

    D.NullPointerException


    参考答案：C

  • 第5题：

    publicclassTest{publicstaticvoidmain(String[]args){intx=0;assert(x>0)?assertionfailed”:assertionpassed”;System.out.println(Finished”);}}Whatistheresult?()

    A.finished

    B.Compilationfails.

    C.AnAssertionErroristhrownandfinishedisoutput.

    D.AnAssertionErroristhrownwiththemessage“assertionfailed”.

    E.AnAssertionErroristhrownwiththemessage“assertionpassed”.


    参考答案：B

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