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Method variable should always be marked 'final'  RSS feed

 
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What do you guys say?

If you need to do any operation on it create local variable and assign the parameter to local variable.

For example,



 
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Seems pretty useless. A method parameter is equivalent to a local variable. If you want to change it, just change it.

I know that you can have at least NetBeans warn about assigning values to a method parameter. Supposedly because it may lead to confusing code. I don't really buy that myself.
 
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Stephan van Hulst wrote:Seems pretty useless. A method parameter is equivalent to a local variable. If you want to change it, just change it.

I know that you can have at least NetBeans warn about assigning values to a method parameter. Supposedly because it may lead to confusing code. I don't really buy that myself.



I think that it has something to do with coding conventions.
 
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You only “need” to mark local variables or parameters final when they are used inside an anonymous or local class.
It is probably a good code convention to mark them final to remind yourself they are not changed, but, Stephan is right; you can change local variables if you wish. Changing parameters might cause confusion, but that does not merit a rule.
 
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