What are the common mistakes developers make with the Singleton pattern?

What are the common mistakes developers make with the Singleton pattern?

Some common mistakes include not making the constructor private, failing to handle multithreading, and not considering lazy initialization.

Can you explain why making the constructor private is important?

Making the constructor private ensures that no other class can instantiate the Singleton, preserving the single instance.

What issues can arise from not handling multithreading properly?

Without proper multithreading handling, multiple threads might create multiple instances, violating the Singleton principle.

What is lazy initialization, and why should I consider it?

Lazy initialization delays the creation of the Singleton instance until it's needed, which can improve performance and resource usage.