Is BD-Java harder to use than HDi?

[Filmmaker85]

I just read this article on IGN. Can anyone explain this to me. Why is BD-Java harder to use I thought websites use Java so...I'm lost here.

http://gear.ign.com/articles/841/841360p1.html

Microsoft Releases Xbox 360 HD-DVD Emulator
New development and testing tool will aid studios in HD-DVD authoring.
by Gerry Block
December 13, 2007 - Microsoft today announced the release of new software that aims to help HD-DVD authoring studios test and develop HD-DVD materials such as HDi-based interactive menus, features, and games. An interesting twist is the fact that the commercial testing software runs on the Xbox 360 and will be distributed via Xbox Live.

Microsoft's Xbox 360 HD-DVD Emulator software allows studios to test HD-DVD movies and interactive content in a virtual environment that also provides debugging tools, rather effectively streamlining the currently established workflow that requires authoring studios to burn new HD-DVD discs every time a revision needs testing, manually seek out bugs, and hand-code programming corrections. The HD-DVD Emulator software runs on standard Xbox 360s and is capable of playing HD-DVD test content from network drives, USB flash drives, and burned optical discs. The licensing fee for the commercial software is $2,999, which equates to a rather absurd number of Microsoft Points.

The announcement is indicative of Microsoft's support for HD-DVD on a tertiary level, but what the Xbox 360 HD-DVD Emulator software tools are really about is helping studios debug interactive features programmed on Microsoft's HDi language for interactive content on HD-DVDs. HDi is not the only means by which advanced features like interactive games and picture-in-picture commentary tracks can be programmed for HD-DVDs, but due to good support on Microsoft's part and a stable feature set, HDi has become the generally favored tool for HD-DVD content creation. Its strengths are particularly apparent in situations in which a movie like "300" is available on both HD-DVD and Blu-ray. A glance at the back of the boxes reveals the Blu-ray version lacks almost any interactive features, a consequence of the currently unstable and difficult to use BD-Java and Blu-ray Profile 1.0 / 1.1 development environments.

Microsoft has been testing the software for the past five months with more than 40 commercial authoring studios like Deluxe Digital and NetBlender, apparently rather successfully. NetBlender's CEO, John Harrington, praises the tools: "The authoring process for HD DVD is more complex and expensive than the process for standard DVD, and as with any new technology, it can require a lot of time and resources. In the process of working with the new Xbox 360 HD DVD Player Emulator, we were able to cut the number of test discs needed per month from roughly 200 down to 50, saving more than 100 work hours per month. This positively impacted our business essentially overnight. We estimate we will recoup the low cost of the tool in less than one month's time."