### Relevant Articles:
- [Singletons in Java](https://www.baeldung.com/java-singleton)
- [Introduction to Creational Design Patterns](https://www.baeldung.com/creational-design-patterns)
- [Abstract Factory Pattern in Java](https://www.baeldung.com/java-abstract-factory-pattern)
- [Flyweight Pattern in Java](https://www.baeldung.com/java-flyweight)
- [Double-Checked Locking with Singleton](https://www.baeldung.com/java-singleton-double-checked-locking)
- [Java Constructors vs Static Factory Methods](https://www.baeldung.com/java-constructors-vs-static-factory-methods)
- [Automatic Generation of the Builder Pattern with FreeBuilder](https://www.baeldung.com/java-builder-pattern-freebuilder)
- [How to Replace Many if Statements in Java](https://www.baeldung.com/java-replace-if-statements)