### Relevant Articles:
- [Facade Design Pattern in Java](http://www.baeldung.com/java-facade-pattern)
- [Singletons in Java](http://www.baeldung.com/java-singleton)
- [Proxy, Decorator, Adapter and Bridge Patterns](http://www.baeldung.com/java-structural-design-patterns)
- [Introduction to Creational Design Patterns](http://www.baeldung.com/creational-design-patterns)
- [The Observer Pattern in Java](http://www.baeldung.com/java-observer-pattern)
- [Flyweight Pattern in Java](http://www.baeldung.com/java-flyweight)
- [Service Locator Pattern](http://www.baeldung.com/java-service-locator-pattern)
- [Double-Checked Locking with Singleton](http://www.baeldung.com/java-singleton-double-checked-locking)
- [Composite Design Pattern in Java](http://www.baeldung.com/java-composite-pattern)
- [Visitor Design Pattern in Java](http://www.baeldung.com/java-visitor-pattern)