I'm annoyed and irritated by non-stop off the topic comments. Apart from the fact that the regular expression solution will be several times slower (and not equivalent to the original problem), regular expressions are a DSL of their own right and Java can claim no credit for their conciseness. When you're writing an overview article you cannot go into lengthy examples. These small out of context snippets just serve to illustrate the general idea. I wouldn't dwell too much on them :-)
I appreciate that you can't write entire projects to compare, and for your article overall, just asking you (and other authors who write similar articles) to give people familiar with the incumbent a bit more to chew on.
Nobody writes code to see if a string has an uppercase character, that code was written long ago. Regex may be something that Java imported, but it's right there in the JDK so I have no reason not to use it. How do the two languages look when you're validating email addresses against a whitelist of domains from a config file or URLs for parameters based on some business rules? How do you handle an I/O error when you're halway through writing a file? These are the small problems we know we'll have to do over and over again, but not be able to stash in a standard library (or use someone else's). Pointing out that JavaBeans are silly doesn't hold much weight either, I use lombok :)
How is my comment off-topic? I've read the article author's other work and my general impression is that he's inexperienced with all of these languages but that isn't stopping him from writing ill-researched tracts with poor examples.
