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Entrepreneur. Creator of Groovy++ Alex is a DZone Zone Leader and has posted 31 posts at DZone. You can read more from them at their website. View Full User Profile

Groovy++ v0.2 Small version number but huge milestone

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Today is very big day for Groovy++ team and me personally. Version 0.2 of Groovy++ is available now for download. Please go to and give it a try.

Only (or already) 17 weeks ago we opened very first preview of Groovy++. It was very fresh and far from stable version - more proof of concept than anything usable. We did not know even if it is interesting experiment or something, which will become serious project.

A lot of things changed since that point.

  • We implemented compiler and a lot of functionalityon top of it
  • We have three times more not yet implemented ideas
  • We know now that there is huge interest in community for statically typed Groovy
  • We  fixed (created and fixed truly speaking) 200 bugs
  • We have more that 700 tests
  • We even wrote some amount of documentation
  • We achived Java level of performance
  • We took (really hard) decision and made public promise that next version (v0.3 in 4-6 weeks from now) will be fully open-sourced
I want to express my gratitude to my company MBTE Sweden AB for sponsoring the project, to many friends and collegues from brilliant Groovy community for trust,  support and constructive critique of our ideas - especially to Dierk Koenig, Paul King, Graeme Rocher and Andres Almiray. Without amazing job done by Groovy Core development team leaded by Guillaume Laforge and Jochen Theodorou nothing we developed could be possible. It was great pleasure and honor to have Roshan Dawrani and Evgeny Goldin working together with our team. Their help is invaluable for us and we hope for continuation.

So what is Groovy++?

Groovy++ is statically typed extension of Groovy programming language, which gives together high performance of compiled code and compile type checks.

Additionally to all goodies of standard Groovy it adds a lot of functionality
  • compile time checking of code
  • as fast as Java performance of compiled code
  • easy mixing of statically and dynamically typed code
  • very powerful type inference
  • tail recursion
  • traits (interfaces with default implementation)
  • extension methods (compile time categories)
  • standard library of utilities for functional programming, concurrency and distributed computing (early prototype stage)

There is enough information on particular features available in Groovy++ documentation and External Resources

We are always happy to answer questions in Groovy++ Discussion Group So you are always welcome there both to learn more and share your expirience with us. At the end of the day we develop Groovy++ not only for ourselves but for you, our users.

Published at DZone with permission of its author, Alex Tkachman.


Mitch Pronschinske replied on Thu, 2010/04/08 - 1:29pm


Thanks so much for keeping us updated on the Groovy ++ project.  It's very interesting to see how this technology (which is very significant in the Groovy ecosystem) is progressing over time.

Mark Haniford replied on Thu, 2010/04/08 - 2:13pm

Groovy++ is looking to be the holy grail for the JVM.  The readable conciseness and meta abilities of Groovy with the speed of Java.

IDE support will be interesting.

Alex Tkachman replied on Thu, 2010/04/08 - 2:20pm in response to: Mitch Pronschinske

Thank you, Mitchell. I believe that Groovy++ (if we achieve our goals) can seriously impact JVM landscape. It may be look that we post too much information about our project but the only reason for that is to make people aware.

Alex Tkachman replied on Thu, 2010/04/08 - 2:22pm in response to: Mark Haniford

Thank you, Mark. We do our best to implement all (even hidden) promises of the project.

Hubert Chang replied on Sat, 2010/04/10 - 1:03am

Alex, great works!

Please discuss something about Grails++ possibility:)

First step, If a grails plugin was written in groovy++, would grails support it in runtime ?

Secondly, How difficult to rewrite grails core in groovy++? I has little knowledge about grails core implementation. Does  the groovy++ development team take the grails core transition in mind?  If the rewritten of grails happened, what would be most difficult for  the transition from dynamic type to the static type? How does the metaclass and closure be supported in groovy++? Seems Graeme Rocher shows great interests on Groovy++.

Ruby is famous because of Rails. Groovy++ would get more  eye-cathing with Grails++. :).

Alex Tkachman replied on Sun, 2010/04/11 - 2:37am in response to: Hubert Chang

We obviously want to support Grails as well. For now we are in early research stage

Daniel Perl replied on Tue, 2010/06/01 - 4:09am

Believe me friends i am much excited to join  and i hope no one can ignore its dignity. To be informative is really  great deed. Any how just after my mcitp i will discuss with you and share some my complications.

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