What is Singleton class. What is the use of singleton class

Question

Accepted Answer

Singleton class is a class that can only have one instance at a time.

It is used to ensure that there is only one instance of a class in the system.
It is often used in situations where a single object needs to coordinate actions across the system.
Example: Database connection class, logger class, configuration class.
It can be implemented using private constructors, static methods, and static variables.

Accepted Answer

In object-oriented programming, a Singleton class is a class that can have only one instance (object) at a time, and provides a global point of access to that instance. In other words, it is a design pattern that ensures that there is only one instance of a class and provides a mechanism for accessing that instance throughout an application.

The Singleton pattern is useful in situations where you need to limit the number of instances of a class that can be created. Some examples of when the Singleton pattern might be used include:

When you need to ensure that only one instance of a database connection object is created and used throughout an application.
When you need to ensure that only one instance of a configuration object is created and used throughout an application.
When you need to ensure that only one instance of a log writer object is created and used throughout an application.

To create a Singleton class, you typically define a static method that returns the instance of the class. The first time this method is called, the Singleton class creates an instance of itself, and subsequent calls to the method return the same instance. Here is an example of a

What is Singleton class. What is the use of singleton class

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