On the other hand, "Java" is a programming language, core set of libraries, and virtual machine platform that allows you to create compiled programs that run on nearly every platform, without distribution of source code in its raw form or recompilation. [See the comp.lang.java FAQ http://metalab.unc.edu/javafaq/javafaq.html#xtocid190290 for more information on the origin of Java.]
While the two share part of their names in common, they are really two completely different programming languages/models/platforms. Yes, they can communicate with each other through technologies like LiveScript. However, you should really consider them as two completely separate technologies.