not readable

Final is class and hence object of String, but not reference to this object.
example:
String foo = "foo";
String bar = "bar";
foo = bar;
System.out.println(foo); // bar

And it's a good practice to make method arguments final because it increase code readability

It will be better for readability and for DRY sake, rather on efficiency.

not readable

too procedural

java language

tests not compile and not able to finally check solution because you use '' quotes instead of "" for strings, '' only for char. How this cata was approved?

very bad explanation and code quality (especially tests) java version of this kata

switch is kind of if else statements it is not best practice and not what task description talking about

Because site doesn't allow to downvote garbage solutions and teach people to bad things in this way

really awfull

the most human readable solutions always is better

keep it simple

Why you did not use simple iterator like in my solution, keep it simple (KISS)

Because this site doesn't allow to downvote like stackoverflow and others!!! In this way many really bad solutions pop up in top like shit in real life :)