Why always a variable in public class and main() method is always need to be 'final' [closed]

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Why always variables needs to be final in public class and main() method

It doesn’t. It’s a method-local variable, so it can’t have any access modifiers, but it can be either final or non-final. It has nothing to do with the enclosing class being public or the enclosing method being main(). It’s just because it’s a method-local variable. Only member variables can have access modifiers.

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