I have recently completed to develop the Layout topic of my on going Silverlight course. You can find its community free version at www.abelski.org. The professional version is available at www.abelski.com.

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.