I have recently created three video clips that explain fundamental topics related to defining classes in Scala. These clips were created as part of the ‘Scala Fundamentals’ course, available for free personal and academic usage 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.