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In Java, we write .class (for example: String.class) to get information about the given class. In Kotlin you can write ::class or ::class.java. What is the difference between them?
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:: is just a way to write a lambda expression basically we can use this to refer to a method i.e a member function or property for example class Person (val name: String, val age: Int) Now we can write this to access the person which has the maximium age.
Kotlin offers object-oriented and functional features to developers. In contrast, Java only offers object-oriented programming. Kotlin offers extension creation capabilities, whereas Java doesn't offer any extension function. Kotlin doesn't support implicit conversions; however, Java supports implicit conversions.
By using ::class, you get an instance of KClass. It is Kotlin Reflection API, that can handle Kotlin features like properties, data classes, etc.
By using ::class.java, you get an instance of Class. It is Java Reflection API, that interops with any Java reflection code, but can't work with some Kotlin features.
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According to the Kotlin documentation, when we create an object using any class type as below the reference type will be type of KClass.
val c = MyClass::class // reference type of KClass Kotlin class reference is not the same as a Java class reference. To get a Java class reference, use the .java property on a KClass instance.
val c = MyClass::class.java // reference type of Java You can refer the Kotlin documentation For further details. https://kotlinlang.org/docs/reference/reflection.html#class-references
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