Does use of final keyword in Java improve the performance?

Question

In Java we see lots of places where the final keyword can be used but its use is uncommon.

For example:

String str = \"abc\";
System.ou         


        

Answer 1

As mentioned elsewhere, 'final' for a local variable, and to a slightly lesser extent a member variable, is more a matter of style.

'final' is a statement that you intend the variable to not change (i.e., the variable won't vary!). The compiler can then help you out by complaining if you violate your own constraint.

I share the sentiment that Java would have been a better language if identifiers (I'm sorry, I just cannot call a non-varying thing a 'variable') were final by default, and required you to explicitly say that they were variables. But having said that, I don't generally use 'final' on local variables that are initialized and never assigned; it just seems too noisy.

(I do use final on member variables)