The textbook for the Java programming language encompasses the diverse experiences of the three authors. How does it differ from comparable textbooks or introductory books? The important and practice-relevant Java fundamentals are at the forefront of this work. All topics are presented and explained through numerous exercises. Each chapter includes a brief theoretical introduction that elucidates the fundamental problems and the solutions that arise from them using examples. This approach is complemented by a variety of tasks and their solutions. The book is aimed at beginners of the Java programming language, particularly students, trainees, and learners from various fields. It is suitable for both self-study and as a companion to a lecture or training.