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Given： What is the result？（）
A:The value "4" is printed at the command line.
B:Compilation fails because of an error in line 5.
C:Compilation fails because of an error in line 9.
D:A NullPointerException occurs at runtime.
E:A NumberFormatException occurs at runtime.
F:An IllegalStateException occurs at runtime.

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出自：Oracle认证

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