Summary

In this appendix, we discussed yet another selection of JVM languages: Oracle's Nashorn (JavaScript), Jython (Python), JRuby (Ruby), Frege (Haskell), and Ceylon (a unique language). For each language, we discussed the main language and looked at a particularly interesting or unique feature or library. We also mentioned the name of the required Eclipse IDE plugin (if available for the language) and gave instructions on how to run the language using the interactive REPL shell, if the language provided one.

This concludes our book. We hope it helped provide you a better overview of both the JVM itself and some of the more important languages that target this powerful and stable virtual machine--a virtual machine that powers a lot of the popular mainstream online services and websites that millions of people use around the globe, and is expected to take full advantage of new technologies and trends as they emerge.