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case label int-compatible variable

Leandro Coutinho
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Joined: Mar 04, 2009
Posts: 417
howdy friends!

This is a question from the round-up game: http://www.javaranch.com/game/game2.jsp

In a switch statement, the argument to the case label (case: argument) can be any variable which can fit within an int.

Answer: false
The case argument must be either an int literal, or an int-compatible variable which is a constant (i.e. static final)

I agree with the answer, but I think there is one problem in the question and other in the explanation.

It should be (case argument:) and the other problem is when it says ... constant (i.e. static final)

Sahil Kapoor
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Joined: Sep 12, 2009
Posts: 316
The case arguments must be Compile-time constants
when you mark some variable final and assign it a value , then it is a compile time constant.

It should not be static, it should be Compile time constant and that means it must be final and initialized!!!

static finals are called constants because of some historical reasons..... ( In accordance to Henry Wong )

otherwise final variables are constants.


SCJP 6.0 96%

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Abimaran Kugathasan
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Joined: Nov 04, 2009
Posts: 2066

Have a look on here, here, here, and here. Go through them, you'll get a clear idea!

Before ask, have a Google search!


|BSc in Electronic Eng| |SCJP 6.0 91%| |SCWCD 5 92%|
Hebert Coelho
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Joined: Jul 14, 2010
Posts: 754

yea dude, they must be final.

Imagine if their value changes, the java would lose the reference.


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