JVM project—which was called Rhino (Nashorn is the German word for “rhino”).
Nashorn is a completely rewritten implementation and strives for easy interopera‐
perfect 100% on spec compliance and is already at least 20 times faster than Rhino
on most workloads.
Introduction to Nashorn
Michael Morrison (O'Reilly) is a good place to start.
top of the same virtual machine as Java.
Non-Java Languages on the JVM
In fact, there are a very large number of non-Java languages that run on the JVM—
ble by the fact that the Java language and JVM are only very loosely coupled, and
only really interact via the definition of the class file format. This can be accom‐
plished in two different ways:
• The source language has an interpreter that has been implemented in Java.