I have recently completed to develop the Navigation topic in my Silverlight Basics course. You can find the community free version (for personal usage) at www.abelski.org. The professional version can be found at www.abelski.com. The video clips below were prepared as part of this topic.

Stable Values in Java (JEP 502): Deferred Immutability with JVM Trust
Explore Stable Values – a new Java 25 upcoming feature (JEP 502) enabling lazy initialization with immutable performance and JVM-level optimizations.