Charles Nutter from the JRuby project talks to Charles Anderson about JRuby and the Java Virtual Machine (JVM) as a platform for implementing programming languages. They begin by discussing the Java platform beyond just the Java language. As a case study in implementing a language other than Java on the JVM, they discuss JRuby - what it is and how it’s implemented on the JVM. They discuss recent additions to the Java platform like the invoke-dynamic byte code and lambdas in Java 8. The conversation concludes by discussing the future of the Java language, platform, and virtual machine.