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First, let me point out that once again we are comparing Java - a runtime, a language platform and an entire ecosystem comprising many frameworks - with Rails, a specific web framework designed with a specific philosophy (opinionated defaults that work in 90% of cases, YAGNI, etc.) for a specific range of uses ("rapidly prototyping a small-to-moderately sized web site"). So just because Rails developers hate something doesn't mean it's generally evil. It might just be wrong for Rails. Many things are; otherwise Rails would have no texture. Saying no to things is what design is about. Now let's talk about hate. Everyone hates something. There is nothing wrong with hating things. Hate is just personal taste turned up to eleven. You should strive to hate politely and with grace, to realize that other people love the things you hate and are nonetheless human, and probably even smart. And you should strive to remember that there's an important difference between the things you hate and things that objectively suck. Java, for example, does not suck. Not always. Lots of work has gone into it. Lots of Java-based tools are essential. There are big classes of problem for which Java is currently the best solution. Nonetheless, I hate Java. It is a handy mental shortcut, one that has yet to lead me astray. My belief is that the problems for which Java-the-language is the solution are problems I don't want to work on, and that I don't have enough time in my life to address the problems I do want to work on, so I should simply develop a Java allergy that kicks in whenever I see the generics syntax and that causes my eyes to water until I flee towards fresh air. It works well. (What's sad is when you find yourself hating something that is smack-dab in the middle of a set of problems that you want to work on. Hello, PHP! This requires a much richer set of coping techniques than simple allergic avoidance.) (And, of course, Java is not just a language, and JRuby appears, from the outside, to be awesome, and my curiosity about Clojure is rising, so I may soon temper my simple hatred of Java into a rich melange of love and hate. The stuff of which novels are born, really.) |
The tough part about languages like Scala and Clojure is that the existing Java ecosystem bleeds through heavily. For instance, while Scala boils away a lot of repetitious code, it's still there under the hood. It feels like an architectural band-aid. That may change as the ecosystem around each language evolves and writes frameworks and libraries in Scala/Clojure rather than reusing them from Java. However in Scala's case it's as if the language is being marketed as the next evolution of Java-as-a-language with a heavy emphasis on reusing existing Java frameworks and libraries, so I expect the people writing code in the existing Java community to migrate to Scala.
Elitest? Maybe. But I think it's a realistic view.
The newer JVM languages are great if you already have an existing Java codebase, however I'm struggling to find sound reasons to use Scala on a geen field project.