This is from January, long before the Foundation announced its trademark policy.
Java Mobile Edition allows the entire ecosystem of existing mobile device apps to run on the Pi, most of which can run securely in well under 1 MB of RAM each, and a lot of it is Internet-aware. That's a lot better than most app bloatware that requires mountains of conflicting dependencies that provide little useful functionality, often leaks memory like a sieve, and includes nothing in the way of security, much less network security.
Java Standard Edition running with a just-in-time compiler is essentially as fast and uses the same RAM as functionally-equivalent C since it's compiled to the same object code. Most apps don't need to be written in C and shouldn't be, especially if the implementers aren't sufficiently experienced in memory management, security, networking, etc. Java Enterprise Edition is the only way legacy software can be run efficiently and securely on modern hardware, and wrapping it in Java is a piece of cake, vs. impossibly complicated in anything else. I don't expect that SE or EE are going to be used much on the Pi, but, if the goal is educating students on serious software development in the real world, teaching Python, C, and Java will cover a lot of the professional waterfront.
As for Oracle, they're in business to make a profit just as much as companies like Broadcom (engineers' paychecks have to be paid for somehow), but, they have a long history of offering their commercial products as freeware up to certain sized databases, they've supported open-source for many years (not just Sun projects), and Java can be used without licensing fees for non-commercial purposes. Here's some of the open-source/freeware projects they support:
Oracle's Linux Projects
Oracle Unbreakable Linux Support
Oracle VM | Xen
Enterprise Pack for Eclipse
Apache MyFaces Trinidad
GlassFish Server Open Source Edition
Hudson Continuous Integration
Oracle Database 10g Express Edition
Oracle Berkeley DB
Oracle+Python, Ruby/RoR, Groovy, etc.
Oracle SQL Developer
Oracle SQL Developer Data Modeler
The best things in life aren't things ... but, a Pi comes pretty darned close!
"Education is not the filling of a pail, but the lighting of a fire." -- W.B. Yeats
In theory, theory & practice are the same - in practice, they aren't!!!