Hands-On Object-Oriented Programming with Kotlin

The object class with inheritance and interfaces

Like normal classes, the object class can also make the most of the benefits of inheritance. We can create a normal parent class that can be extended by the object class. In the following example, we have a class called Parent with one callMySingleton function. We also have one MySingleton object class, which extends the parent class. The MySingleton class overrides the callMySingleton() function:

open class Parent {     open fun callMySingleton(){         println("Parent class is called")     } }  object MySingleton : Parent() {      override fun callMySingleton(){         super.callMySingleton()         println("my Singleton class is called")     } }

In the main function, we use a single instance of the object class, call the ...