Changelog 📋

Section 17 Java – Generics: Return null vs return Optional<T>

Section 17 Java – Generics: Where should Optional<T> be avoided?

Section 17 Java – Generics: Methods in Optional<T>

Glossary overview page consolidating all terms from the internal glossary

13 more glossary entries: Overhead, POJO, JPA, ORM, DTO, Java Bean, Entity, SRP, OCP, LSP, ISP, DIP and OOP

Some minor spelling and grammar corrections as well as minor content corrections or additions

Chapter 17 Java – Generics

Chapter Math – Numeral Systems

Section 03 Java – Variables: Primitive Data Types and Wrapper-Classes

Section 04 Java – Inputs and Outputs: BufferedReader vs. Scanner

External links (Compiler Explorer, ProtonDB, Have I Been Pwned, Bruno, uiGradients) to section Practical tools in Digital Toolbox

External link Linux From Scratch to Digital Toolbox

Reordered future topics in category Java

Minor spelling and grammar corrections as well as minor content corrections or additions

Hyperlink to free educational license of IntelliJ in section Java: IDE

4 more glossary entries (Bytecode, Java-Stack, JIT, SOLID-Principles)

Note to section HTML: What is the DTD?

Some minor spelling and grammar corrections as well as minor content corrections or additions

Chapters 0 to 3 to category HTML

Chapters 0 to 16 to category Java

Chapters Vectors and Matrices to category Math