In my IntelliJ (a recent version), if I write a small Java function like this:

    private static void blah()
    {
        final int abc = 3;
        for (int def = 7; def < 20; ++def)
        {
            System.out.print(def);
        }
    }

The variable 'def' is underlined. Mouse-over hint shows: 'Reassigned local variable'. To be clear, 'abc' is not underlined. When I write Java, I try to use the smallest variable scopes possible with as much final (keyword) as possible. It helps me to write more maintainable code, that is easier to read.