Java Platform, Standard Edition (Java SE) lets you develop and deploy Java applications on desktops and servers, as well as in today's demanding embedded environments. Java offers the rich user interface, performance, versatility, portability, and security that today's applications require. http://www.oracle.com/technetwork/java/
See http://www.oracle.com/technetwork/java/javase/downloads/index-jsp-138363.html for releases.
Edit the Makefile to ensure that you are setting the intended version, then run make.
make