I have just completed to write the Israeli Guide to J2ME. It is a freeware tutorial for learning J2ME. It is available for free personal and academic usage. The tutorial focuses on J2ME (CLDC/MIDP). You can find it on-line at http://www.zindell.com/israeliJavaBookME/ch1.htm.

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.