Ruby vs Java

The document compares the Java and Ruby programming languages. It discusses that Ruby is an interpreted language while Java is compiled, and that Ruby code can be loaded at runtime while Java code must be compiled. It also summarizes that Ruby syntax is more terse and flexible than Java syntax, with dynamic typing and the ability to easily extend core classes and use metaprogramming. While Ruby is elegant and flexible, the document notes Java has better performance. It concludes that JRuby allows Java and Ruby to collaborate, and that Ruby and Java can form a powerful combination.