Do we need other languages on the JVM?

Truth to be told, Java is an old-timer in today’s changing world. I began Java 10 years ago and I was not a pioneer at the time. Java the language’s evolutions has been hindered by:

The mixing of the three makes any update on the language a real challenge. The last major change dates back to Java 5, which is End Of Life…​

So, instead of following the slow Java path, some developers prefer to use the highway to features not present in the language, such as Scala’s functional programming.

Although I have a clear view why developers may want to use languages other than Java on the JVM, I can only speculate as why companies are releasing them. IMHO, big players in the Java ecosystem are afraid of Oracle’s control over Java and are trying to escape potential future costs of using Java. It’s a real risk considering Oracle’s stance on TCK as well as the Hologic fiasco.

The Java ecosystem is very rich, and one doesn’t just qualify as a Java developer, but as a Java/Spring/Hibernate developer for example. In the event of a coming of other languages, recruitment will be even harder. And from a developer perspective, skills needed will be more widespread, thus leading to a decrease of knowledge in each individual language (no, you cannot be a master of many languages).

Today, the market can roughly be divided into Java, .Net and PHP. I agree that others exist but frankly, they do not count as major players (Flex excepted but it’s staying on the GUI). If the Java language gives way to a bunch of other languages, however fantastic they are, the Java community as a whole will be fragmented into many tiny communities that won’t play nicely with one another. Notice that it’s beginning to happen if you read the comments on Ceylon, some definitely look like a war waiting to happen.

Some complain about Java verbosity and choose a language that will make them write (and read) less code. Although I agree that it’s more maintainable to write 10 LOC against 100, I don’t see a problem in writing 15. I respectfully remind everyone that not every developer is top-notch and that writing explicit code (and reading it) goes a long way toward having maintainable software.

For those obsessed with LOC-optimization, I gladly provide this contest.

Java doesn’t have operator overloading. Again, this is not a problem, at least for me: this means I can count that 1+1 does what I expect, and not another circonvoluted operation. As a counter-example, just have a look at Scala Akka’s bang operator (for newbies, there are also bang bang and bang bang bang). Sure it’s short but you really need to know what it does. If it’s the only library you use, that’s fine; if not, you’re headed for a world of doubts.

Only the future will tell but I’m afraid the trend is that languages going to go beyond a nice are ones that free developers from purely technical tasks with no business value, such as memory management, portability, persistance, and so on. Do the former two ring any bell? Java surfed on them. Powerful or hype are adjectives that managers don’t care about. Since they are in position to decide, I think that because a language can do more than another has no interest other than a educational one.