What is JRuby?
JRuby is the effort to recreate the Ruby (http://www.ruby-lang.org) interpreter in Java. The Java version is tightly integrated with Java to allow both to script any Java class and to embed the interpreter into any Java application. See the docs directory for more information.
JRuby is a tool in the Languages category of a tech stack.
Why developers like JRuby
Faster than Ruby
Deploy as executable jay
Supports native Ruby gems out the box
Garbage collection built-in