Singleton Pattern Courses
Pluralsight Spring 6: Design Patterns
LinkedIn Learning Advanced Java: Hands-on with Streams, Lambda Expressions, Collections, Generics and More
LinkedIn Learning The Singleton Pattern - Anti-Pattern or Solution?
cpponsea via YouTube Design Patterns in Java: Concepts and Common Implementations
NashKnolX via YouTube Design Patterns Usage in Java - CodeCamp
NashKnolX via YouTube Creational Design Patterns in Modern C++
Packt via Coursera