## Core Java Lang (Part 4) This module contains articles about core features in the Java language - [The Java final Keyword – Impact on Performance](https://www.baeldung.com/java-final-performance) - [The package-info.java File](https://www.baeldung.com/java-package-info) - [What are Compile-time Constants in Java?](https://www.baeldung.com/java-compile-time-constants) - [Java Objects.hash() vs Objects.hashCode()](https://www.baeldung.com/java-objects-hash-vs-objects-hashcode) - [Referencing a Method in Javadoc Comments](https://www.baeldung.com/java-method-in-javadoc)