Singleton Creation in Java to handle concurrency

Singleton Design Pattern using Lazy Instantiation

https://www.youtube.com/watch?v=CYMoiJ8d1Us

Singleton Design Pattern using Synchronized getInstance

https://www.youtube.com/watch?v=wRMNQH5tgKw

Singleton Design Pattern using Double Checked Locking

https://www.youtube.com/watch?v=yvwIZzur-lw

Singleton Design Pattern using enum INSTANCE

https://www.youtube.com/watch?v=YOi5i-93lgo