How to use object in Kotlin

 In Kotlin, object is used when you need a single instance of a class or when defining an anonymous object. Here are the main use cases:

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1. Singletons (Object Declarations)

Use object when you need a single instance of a class throughout your application.

⚡ Use case: Managing a database connection, network client, or app-wide configuration.

2. Companion Objects

Use companion object inside a class to define static-like behavior.

⚡ Use case: Factory methods, constants, or utility functions within a class.

3. Anonymous Objects (Object Expressions)

Use object when you need a one-time implementation of an interface or class.

⚡ Use case: Implementing listeners or callbacks without creating a full class.

4. Object Inheritance (Using object with a Superclass)

If a singleton needs to extend another class or implement an interface:

⚡ Use case: Creating a global logging instance.

Summary

Singleton	(object)	Global database manager, configuration, logging
Static-like behavior	(companion object)	Factory methods, constants inside a class
Anonymous class	(object expression)	Event listeners, callbacks
Inheritance	(object with superclass)	Extending abstract classes or implementing interfaces