Having good communication skills is a must when it comes to training other developers and when it comes to teaching in general. I cannot imagine a software development trainer that cannot communicate successfully with his students. Good communication skills will lead to a better understanding of the student’s difficulties and allow better optimization of the training.

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.