单项选择题
What is the result？（）
A.collie B.harrier C.Compilation fails. D.collie harrier E.An exception is thrown at runtime.
And the command-line invocations： javac Pass2.java ...
And the command-line invocations： javac Pass2.java java Pass2 5 What is the result？（）
A.Compilation fails. B.An exception is thrown at runtime. C.doStuff x=6，main x =6 D.doStuff x=6，main x=7 E.doStuff x=7，main x=6 F.doStuff x=7，main x=7
What is the result？（） A.r， t， t，B.r， e， o，C.Compilation...
A.r， t， t， B.r， e， o， C.Compilation fails. D.An exception is thrown at runtime.
Which code fragment， inserted at the end of line 12， pr...
Which code fragment， inserted at the end of line 12， produces the output p is 420？（）
A.p.setWeight（420）； B.p.changePayload（420）； C.p = new Payload（420）； D.Payload.setWeight（420）； E.p = Payload.setWeight（420）；
