JAVA is DOOMED (JID) is an OpenSource 3D engine implemented in JAVA and uses OpenGL as graphic API. The reference implementation of the Java bindings jogl is used to access the OpenGL API. ESCAPE and ModelLoader are applications based on JID.
Java Inventor is a Java interface to Open Inventor. Open Inventor (http://oss.sgi.com/projects/inventor/) is a popular API for developers of 3D applications. Java Inventor uses the Java Native Interface (JNI) to access the Open Inventor C++ libraries.