## 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)
- [Tiered Compilation in JVM](https://www.baeldung.com/jvm-tiered-compilation)
- [Fixing the “Declared package does not match the expected package” Error](https://www.baeldung.com/java-declared-expected-package-error)
- [Chaining Constructors in Java](https://www.baeldung.com/java-chain-constructors)
- [Difference Between POJO, JavaBeans, DTO and VO](https://www.baeldung.com/java-pojo-javabeans-dto-vo)
- [Implements vs. Extends in Java](https://www.baeldung.com/java-implements-vs-extends)