Singleton Method Design Pattern in Java

The Singleton design pattern ensures a class has only one instance and provides a global access point to it. To implement it in Java:

1. Private Constructor: Prevents instantiation from outside the class.
2. Static Instance: Holds the single instance of the class.
3. Public Access Method: Provides access to the instance.

Example:

For thread safety, use synchronized or an eager initialization approach. Singleton is widely used for configuration, logging, or caching.