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publicclassThreads5{publicstaticvoidmain(String[]args){newThread(newRunnable(){publicvoidrun(){System.out.print(”bar”);}}).start();}}Whatistheresult?()
A.Compilationfails.
B.Anexceptionisthrownatruntime.
C.Thecodeexecutesnormallyandprints“bar”.
D.Thecodeexecutesnormally,butnothingprints.
参考答案
更多 “ publicclassThreads5{publicstaticvoidmain(String[]args){newThread(newRunnable(){publicvoidrun(){System.out.print(”bar”);}}).start();}}Whatistheresult?() A.Compilationfails.B.Anexceptionisthrownatruntime.C.Thecodeexecutesnormallyandprints“bar”.D.Thecodeexecutesnormally,butnothingprints. ” 相关考题
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classOrderimplementsRunnable{publicvoidrun(){try{Thread.sleep(2000);}catch(Exceptione){}System.out.print(in);}publicstaticvoidmain(String[]args){Threadt=newThread(newOrder());t.start();System.out.print(pre);try{t.join();}catch(Exceptione){}System.out.print(post);}}可产生哪两项结果?()A.inpreB.preinC.inprepostD.preinpost
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classWorkimplementsRunnable{Threadother;Work(Threadother){this.other=other;}publicvoidrun(){try{other.join();}catch(Exceptione){}System.out.print(afterjoin);}}classLaunch{publicstaticvoidmain(String[]args){newThread(newWork(Thread.currentThread())).start();System.out.print(afterstart);}}结果为:()A.afterjoinB.afterstartC.afterjoinafterstartD.afterstartafterjoin
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classOrderimplementsRunnable{publicvoidrun(){try{Thread.sleep(2000);}catch(Exceptione)System.out.print(in);publicstaticvoidmain(String[]args){Threadt=newThread(newOrder());t.start();System.out.print(pre);try{t.join();}catch(Exceptione){}System.out.print(post);可产生哪两项结果?()A.preinpostB.preinC.inpostpreD.inprepostE.prepostin
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Runnabler=newRunnable(){publicvoidrun(){System.out.print(”Cat”);}};Threadt=newThread(r){publicvoidrun(){System.out.print(”Dog”);}};t.start();Whatistheresult?()
A.CatB.DogC.Compilationfails.D.Thecoderunswithnooutput.E.Anexceptionisthrownatruntime.
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publicclassThreads4{publicstaticvoidmain(String[]args){newThreads4().go();}publicvoidgo(){Runnabler=newRunnable(){publicvoidrun(){System.out.print(”foo”);}};Threadt=newThread(r);t.start();t.start();}}Whatistheresult?()A.Compilationfails.B.Anexceptionisthrownatruntime.C.Thecodeexecutesnormallyandprints?foo”.D.Thecodeexecutesnormally,butnothingisprinted.
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publicclassThreads3implementsRunnable{publicvoidrun(){System.out.print(”running”);}publicstaticvoidmain(String[]args){Threadt=newThread(newThreads3());t.run();t.run();t.start();}}Whatistheresult?()
A.Compilationfails.B.Anexceptionisthrownatruntime.C.Thecodeexecutesandprints“running”.D.Thecodeexecutesandprints“runningrunning”.E.Thecodeexecutesandprints“runningrunningrunning”.
考题
WhichtwocodefragmentswillexecutethemethoddoStuff()inaseparatethread?()
A.newThread(){publicvoidrun(){doStuff();}}B.newThread(){publicvoidstart(){doStuff();}}C.newThread(){publicvoidstart(){doStuff();}}.run();D.newThread(){publicvoidrun(){doStuff();}}.start();E.newThread(newRunnable(){publicvoidrun(){doStuff();}}).run();F.newThread(newRunnable(){publicvoidrun(){doStuff();}}).start();
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publicclassFooimplementsRunnable(publicvoidrun(Threadt){system.out.printIn(Running.”);}publicstaticvoidmain(String[]args){newthread(newFoo()).start();})Whatistheresult?()
A.Anexceptionisthrown.B.Theprogramexistswithoutprintinganything.C.Anerroratline1causescompilationtofail.D.Anerroratline2causesthecompilationtofail.E.“Running”isprintedandtheprogramexits.
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classMyThreadextendsThread{publicvoidrun(){System.out.println(AAA”);}publicvoidrun(Runnabler){System.out.println(BBB”);}publicstaticvoidmain(String[]args){newThread(newMyThread()).start();}}Whatistheresult?()A.AAAB.BBBC.Compilationfails.D.Thecoderunswithnooutput.
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