Complete Guide to Java Design Patterns: Creational, Behavioral, and Structural

Introduction

• Improve your code with design patterns
• What you should know

1. Design Patterns

• What is a design pattern?

2. Creational Design Patterns

• What are creational design patterns?

3. The Builder Pattern

• Avoiding complex constructors
• Recognize where to use the Builder pattern
• Implement a complete Builder pattern
• Improving the Builder pattern
• Challenge: The Builder pattern
• Solution: The Builder pattern

4. The Singleton Pattern

• When to use the Singleton pattern
• Implementing the Singleton pattern
• Thread safety with the Singleton pattern
• Challenge: The Singleton pattern
• Solution: The Singleton pattern

5. The Prototype Pattern

• Understand the Prototype pattern
• Implement the Prototype pattern
• Handling mutability
• Challenge: The Prototype pattern
• Solution: The Prototype pattern

6. The Factory Method

• Understand the Factory Method pattern
• Implement the Factory Method pattern
• Improve the Factory Method pattern with functional programming
• Challenge: The Factory Method pattern
• Solution: The Factory Method pattern

7. Abstract Factories

• Understand abstract factories
• Recognize where to use abstract factories
• Create factories for families of objects
• Implement the complete Abstract Factory pattern
• Challenge: The Abstract Factory pattern
• Solution: The Abstract Factory pattern

8. Structural Design Patterns

• What are structural design patterns?

9. The Adapter Pattern

• Understand the Adapter pattern
• Implement the object Adapter pattern
• Implement the class Adapter pattern
• Challenge: The Adapter pattern
• Solution: The Adapter pattern

10. The Bridge Pattern

• Understand the Bridge pattern
• Implement the Bridge pattern
• Challenge: The Bridge pattern
• Solution: The Bridge pattern

11. The Composite Pattern

• Understand the Composite pattern
• Implement the Composite pattern
• Challenge: the Composite pattern
• Solution: the Composite pattern

12. The Decorator Pattern

• Understand the Decorator pattern
• Change behavior dynamically with a decorator
• Add multiple decorations to an object
• Challenge: The Decorator pattern
• Solution: The Decorator pattern

13. The Facade Pattern

• Understand the Facade pattern
• Implement the Facade pattern
• Challenge: The Facade pattern
• Solution: The Facade pattern

14. The Flyweight Pattern

• Understand the Flyweight pattern
• Implement the Flyweight pattern
• Challenge: The Flyweight pattern
• Solution: The Flyweight pattern

15. The Proxy Pattern

• Understand the Proxy pattern
• Recognize where to use the Proxy pattern
• Use a proxy to create objects on demand
• Use a proxy to control access
• Challenge: The Proxy pattern
• Solution: The Proxy pattern

16. Behavioral Design Patterns

• What are behavioral design patterns?

17. The Chain of Responsibility Pattern

• Understand the Chain of Responsibility pattern
• Recognize where to use the Chain of Responsibility pattern
• Implement a successor chain
• Challenge: The Chain of Responsibility pattern
• Solution: The Chain of Responsibility pattern

18. The Command Pattern

• Understand the Command pattern
• Implement the Command pattern
• Use the Command pattern to delay operations
• Challenge: The Command pattern
• Solution: The Command pattern

19. The Interpreter Pattern

• Understand the Interpreter pattern
• Creating an interpreter for a language
• Interpreting a variable
• Challenge: The Interpreter pattern
• Solution: The Interpreter pattern

20. The Iterator Pattern

• Understand the Iterator pattern
• Create an Iterable
• Create an Iterator
• Challenge: The Iterator pattern
• Solution: The Iterator pattern

21. The Mediator Pattern

• Understand the Mediator pattern
• Avoid tight coupling between objects
• Create a Mediator object
• Challenge: The Mediator pattern
• Solution: The Mediator pattern

22. The Memento Pattern

• Understand the Memento pattern
• Restoring an object's state
• Challenge: The Memento pattern
• Solution: The Memento pattern

23. The Observer Pattern

• Understand the Observer pattern
• Implementing an Observer
• Implementing an Observable
• Challenge: The Observer pattern
• Solution: The Observer pattern

24. The State Pattern

• Understand the State pattern
• Avoiding multiple if-else statements
• Allowing an object to change its behavior
• Challenge: The State pattern
• Solution: The State pattern

25. The Strategy Pattern

• Understand the Strategy pattern
• Implement the Strategy pattern
• Improve the Strategy pattern
• Challenge: The Strategy pattern
• Solution: The Strategy pattern

26. The Template Method Pattern

• Understand the Template Method pattern
• Implement the Template Method pattern
• Challenge: The Template Method pattern
• Solution: The Template Method pattern

27. The Visitor Pattern

• Understand the Visitor pattern
• Implement the Visitor pattern
• Challenge: The Visitor pattern
• Solution: The Visitor pattern

Conclusion

• Next steps