Java generator gives you the possibility to develop Java applications taking advantage of GeneXus Evolution 3.
This page describes the new features regarding exclusively to the Java Generator.
Regarding to GeneXus Access Manager (GAM), Twitter has changed its API, a new jar for implementing Twitter Authentication Type is distributed: Twitter4j-core-4.0.1.jar.
Java 8 support has been added too.
Apache Tomcat 8 support has been added as since GeneXus Evolution 3 upgrade 2.