单项选择题
publicclassXimplementsRunnable(privateintx;privateinty;publicstaticvoidmain(Stringargs)(Xthat=newX();(newThread(that)).start();(newThread(that)).start();)publicsynchronizedvoidrun()(for(;;)(x++;y++;System.out.printIn(x=+x+,y=+y);)))Whatistheresult?()
A.Anerroratline11causescompilationtofail.
B.Errorsatlines7and8causecompilationtofail.
C.Theprogramprintspairsofvaluesforxandythatmightnotalwaysbethesameonthesameline(forexample,“x=2,y=1”)
D.Theprogramprintspairsofvaluesforxandythatarealwaysthesameonthesameline(forexample,“x=1,y=1”.Inaddition,eachvalueappearstwice(forexample,“x=1,y=1”followedby“x=1,y=1”)
E.Theprogramprintspairsofvaluesforxandythatarealwaysthesameonthesameline(forexample,“x=1,y=1”.Inaddition,eachvalueappearstwice(forexample,“x=1,y=1”followedby“x=2s,y=2”)
A.start();(newThread(that)).start();)publicsynchronizedvoidrun()(for(;;)(x++;y++;System.out.printIn(x=+x+,y=+y);)))Whatistheresult?()
A.Anerroratline11causescompilationtofail.
B.Errorsatlines7and8causecompilationtofail.
C.Theprogramprintspairsofvaluesforxandythatmightnotalwaysbethesameonthesameline(forexample,“x=2,y=1”)
D.Theprogramprintspairsofvaluesforxandythatarealwaysthesameonthesameline(forexample,“x=1,y=1”.Inaddition,eachvalueappearstwice(forexample,“x=1,y=1”followedby“x=1,y=1”)
E.Theprogramprintspairsofvaluesforxandythatarealwaysthesameonthesameline(forexample,“x=1,y=1”.Inaddition,eachvalueappearstwice(forexample,“x=1,y=1”followedby“x=2s,y=2”)