publicclassXimplementsRunnable{privateintx;privateinty;publicstaticvoidmain(String[]args){Xthat=newX();(newThread(that)).start();(newThread(that)).start();}publicvoidrun(){for(;;){synchronized(this){x++;y++;}System.out.println(Thread.currentThread().getNa

题目

publicclassXimplementsRunnable{privateintx;privateinty;publicstaticvoidmain(String[]args){Xthat=newX();(newThread(that)).start();(newThread(that)).start();}publicvoidrun(){for(;;){synchronized(this){x++;y++;}System.out.println(Thread.currentThread().getName()+x=+x+,y=+y);}}}Whatistheresult?()

A.Compilationfails.

B.Theprogramprintspairsofvaluesforxandythatmightnotalwaysbethesameonthesameline(forexample,“x=2,y=1”).

C.Theprogramprintspairsofvaluesforxandythatarealwaysthesameonthesameline(forexample,“x=1,y=1”). Inaddition,eachvalueappearsonlyonce(forexample,“x=1,y=1”followedby“x=2,y=2”). Thethreadnameatthestartofthelineshowsthatboththreadsareexecutingconcurrently.

D.Theprogramprintspairsofvaluesforxandythatarealwaysthesameonthesameline(forexample,“x=1,y=1”). Inaddition,eachvalueappearsonlyonce(forexample,“x=1,y=1”followedby“x=2,y=2”). Thethreadnameatthestartofthelineshowsthatonlyasinglethreadisactuallyexecuting.


相似考题
参考答案和解析
参考答案:D
更多“publicclassXimplementsRunnable{privateintx;privateinty;publicstaticvoidmain(String[]args){ ”相关问题
  • 第1题:

    以下哪个main方法是正确的?

    A.public static void main(string[] args)

    B.public static void Main(String[] args)

    C.public static void main(String[] args)

    D.public static main(String[] args)

    E.public void main(String[] args)


    public static void main(String[] args)

  • 第2题:

    以下哪个是有效的Java程序入口函数?

    A.public static void main(String[] args);

    B.public static void main();

    C.public static int main(String[] args);

    D.public static void main(int argc, String[] args)

    E.main()


    public static void main(String[] args);

  • 第3题:

    19、以下哪个是有效的Java程序入口函数?

    A.public static void main(String[] args);

    B.public static void main();

    C.public static int main(String[] args);

    D.public static void main(int argc, String[] args)


    public static void main(String[] args);

  • 第4题:

    main()方法的正确定义方式是()。

    A.public static void main (String [ ] args ) { new NameSurfer().start (args ) ; }

    B.public static main (String [ ] args ) { new NameSurfer().start (args ) ; }

    C.public void main (String [ ] args ) { new NameSurfer().start (args ) ; }

    D.public static void main (String [ ] args ) { NameSurfer().start (args ) ; }


    public static void main(String[] args) {}

  • 第5题:

    main方法是Java应用程序执行的入口点,下面main方法的方法头合法的是()

    A.public static void main()

    B.public static void main(String[] args)

    C.public static void Main(String[] args)

    D.public static int main(String[] args)


    public static void main( String[] args )