为什么Netbeans建议变量最终

Question

So i have downloaded new Netbeans 8 version some time ago. In this new version everytime when i declare private variable and assign to it value only once netbeans suggests me to make field final because is never changed.

Ok I understand what final variable is but **whats the advantage in declaring private final int x=3; variable aka constant over private int x=3; and never change it **

i thought about

1. Concurrency ? - But this doesnt make sense for me if value of non-final variable remains the same whole time
2. Speed ?- I think this may be the reason(some caching ?) but im not sure

Any clarification will be appreciated

Answer 1

Netbeans detects that the variable is actually probably a constant, and suggest for you to declare it as such. This has the advantage of preventing future bugs where this variable is accidentally modified.

Also the final also documents the intention of making this variable a constant, together with the usual notation of defining the constant with all uppercase, which helps understand it's purpose in the program to other developers maintaining the code in the future.