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publicclassTest{privatestaticint[]x;publicstaticvoidmain(String[]args){System.out.println(x[0]);}}Whatistheresult?()A.0B.nullC.Compilationfails.D.ANullPointerExceptionisthrownatruntime.E.AnArrayIndexOutOfBoundsExceptionisthrownatruntime.

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

A.0

B.null

C.Compilationfails.

D.ANullPointerExceptionisthrownatruntime.

E.AnArrayIndexOutOfBoundsExceptionisthrownatruntime.

相似考题

1.执行下面程序段，屏幕上将输出( )。 public class Test { private int x=10，y=20； public Test (int x，int y) { System.out.println (x+this.x)； System.out.println (y+y)； } public static void main (String[] args) { Testt= new Test(30，50)； } }A．无输出B．20 40C．40 100D．40 70

2.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.testB.ExceptionC.Compilationfails.D.NullPointerException

3.下列语句序列执行后,x的值是_________。publicclasstest{publicstaticvoidmain(string[]args){inta=2;intb=3;intx=4;x=＋＋a*x;system.out.println(x);}}A.13B.10C.11D.12

4.classRectangle{publicstaticvoidmain(String[]args){int[]x={1,2,3};x[1]=(x[1]〉1)?x[2]:0;System.out.println(x[1]);}}结果为:()A.0B.1C.2D.3

更多“publicclassTest{privatestaticint[]x;publicstaticvoidmain(String[]args){System.out.println(x[0]);}}Whatistheresult?() ”相关问题

  • 第1题：

    publicclassTest{publicstaticvoidmain(String[]args){Stringstr=NULL;System.out.println(str);}}Whatistheresult?()

    A.NULL

    B.Compilationfails.

    C.Thecoderunswithnooutput.

    D.Anexceptionisthrownatruntime.


    参考答案：B

    NULLshouldbe"null".

  • 第2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3题：

    interface A{

    int x = 0;

    }

    class B{

    int x =1;

    }

    class C extends B implements A {

    public void pX(){

    System.out.println(x);

    }

    public static void main(String[] args) {

    new C().pX();

    }

    }


    正确答案：

     

    错误。在编译时会发生错误(错误描述不同的JVM 有不同的信息，意思就是未明确的

    x 调用，两个x 都匹配（就象在同时import java.util 和java.sql 两个包时直接声明Date 一样）。

    对于父类的变量,可以用super.x 来明确，而接口的属性默认隐含为 public static final.所以可

    以通过A.x 来明确。

  • 第4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

  • 第5题：

    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.


    参考答案：C

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