Has any language been implemented in Java?

Question

Do you know of a runtime written in Java/J2ME, that is capable of reading and executing a script/binary file?

Answer 1

Wikipedia has a complete list. However, you sound like you're probably interested in Jython and JRuby.

Answer 2

I wrote just such a language designed to be small enough for J2ME, and to not use reflection/code generation/etc...

http://www.hecl.org

It's open source under a liberal license, so you're welcome to take it, study it, include it in your own programs, or hack it to make it behave like you want.

For 'regular' Java, there are other languages that do more and are faster and more complete.