Bitter Java, Sweeten with JRuby

JRuby allows developers to use the Ruby programming language on the Java platform. It provides the ability to leverage existing Java libraries and frameworks from Ruby code. This allows developers to benefit from the agility of Ruby and dynamic languages for web development while still taking advantage of robust Java technologies for the backend. Rails applications can also be deployed as WAR files to be run on Java application servers and benefit from features like scalability. Overall, JRuby provides a way to incorporate Ruby into Java/JEE projects for improved productivity through rapid prototyping and dynamic web frameworks while still using reliable Java infrastructure.