A practical description of the software design patterns as they are mentioned in the 1994 book "Design Patterns - Elements of Reusable ObjectOriented Software" by the author group Gamma, Helm, Johnson and Vlissides (also called "Gang of Four", GoF for short). All patterns are explained in detail by means of examples and also critically appreciated. Furthermore, design principles of object-oriented programming are described and considered. All examples are commented in detail in the source code and are executable under Java 16. In part, newer features of Java up to and including version 16 are also explained and used.

Practical description of the design patterns UML class diagrams for each pattern Over 100 commented examples with over 650 Java files

Autorentext
Olaf Musch is a computer scientist, has developed software himself for many years and now works as a project manager in the IT department of a large company in Lower Saxony.

Inhalt
What are design patterns.- How to describe them.- Object-oriented design principles.- All 23 original design patterns of the "Gang of Four".- Combining design patterns.