Singleton design pattern in Java

The Singleton Design Pattern in Java ensures that a class has only one instance and provides a global point of access to it. It is used to control object creation, ensuring only one instance exists throughout the application.

Key Features:

1. Private Constructor: Prevents instantiation from other classes.
2. Static Instance: Holds the single instance of the class.
3. Public Accessor Method: Provides a global way to get the instance.

Example:

Usage:

Used in logging, configuration management, database connections, and caching.