多項選擇題

Which two statements are true if a NullPointerException is thrown on line 3 of class C？（）

A.The application will crash.
B.The code on line 29 will be executed.
C.The code on line 5 of class A will execute.
D.The code on line 5 of class B will execute.
E.The exception will be propagated back to line 27.

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單項選擇題

Given a method that must ensure that its parameter is not null：

What， inserted at line 12， is the appropriate way to handle a null value？（）

A.assert value == null；
B.assert value != null ： "value is null"；
C.if （value == null）{ throw new AssertionException（"value is null"）； }
D.if （value == null）{ throw new IllegalArgumentException（"value is null"）； }

多項選擇題

Which two code fragments are most likely to cause a StackOverflowError？（）

A.A
B.B
C.C
D.D
E.E
F.F

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Which two statements are true if a NullPointerException is thrown on line 3 of class C？（）

你可能感興趣的試題

Given a method that must ensure that its parameter is not null： What， inserted at line 12， is the appropriate way to handle a null value？（）

Which two code fragments are most likely to cause a StackOverflowError？（）

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Given a method that must ensure that its parameter is not null：

What， inserted at line 12， is the appropriate way to handle a null value？（）

Which two code fragments are most likely to cause a StackOverflowError？（）