The Singleton Pattern is a creational design pattern that restricts the instantiation of a class to a single object. It ensures that there is only one instance of the class in the system and provides a global point of access to it. This pattern is often used in scenarios where a single instance of a class is needed to control actions or resources.
The Singleton Pattern involves a class that is responsible for creating its own instance and ensuring that no other instances can be created. The class typically provides a static method that returns the instance of the class. If an instance does not exist, the method creates a new instance and returns it. If an instance already exists, the method simply returns the existing instance.
Singleton classes are commonly used in scenarios such as database connections, file managers, logging systems, and thread pools. By ensuring that only one instance of these classes exist, the Singleton Pattern helps in managing shared resources and preventing unnecessary duplication of objects.