What features in java allow it to be installed on non-operating system devices such as simple cell phone?
>> Any websites that can help...

Perhaps this discussion could help?
Cell phones and java (http://www.velocityreviews.com/forums/t138673-cell-phones-and-java.html)

Or go direct to the Sun's toolkit:
Sun Java Wireless Toolkit Download 2.2 Release (http://java.sun.com/products/j2mewtoolkit/download-2_2.html)

Cheers