The Java Ecosystem

OpenJDK

OpenJDK
open and free
no compiled download of JRE and JDK
included in Debian and other systems

Oracle Java Standard Edition

JavaSE
free, but not open, for general purpose computing
Oracle Binary Code License (BCL)
lawsuit against Google because Google distributed Java on Android mobile phones
contains tools that are not free of charge like:
- Java Mission Control
- Java Flight Recorder
- Java Advanced Management Console
- Microsoft Windows Installer
- Java Usage Tracker
payment, if tools are used regularly - using them from time to time is OK

Oracle Java SE Embedded

special version of JDK optimized for microcontrollers

Oracle Java SE Advanced Desktop & Oracle Java SE Advanced

with costs
contains development- and admin tools

Oracle Java SE Suite

= Java SE Advanced but with soft-real-time-capabilities