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.
正确答案:D
答案解析:有
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