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How to create an instance of an anonymous interface in Kotlin?
Kotlin has been developed over JVM, hence it supports most of the features of JVM. Java provides a feature called anonymous inner classes to handle the cases where we have to create an object of a class with a slight modification, without declaring a new subclass. An anonymous inner class doesn't have a name; we define it directly at the instantiation line.
However, Kotlin uses object expressions to provide the same sub-class functionality. In Kotlin, we can create an object expression of an interface by implementing its abstract methods. This implementation technique is known as anonymous interface.
Example – Anonymous Interface in Kotlin
The following example demonstrates how we can implement an anonymous interface in Kotlin.
fun interface myInterface<T> {
fun call(context: T)
}
fun main() {
val a = myInterface<String> {
println("This is implementation of $it")
}
a.call("myInterface")
}
Output
On execution, it will produce the following output −
This is implementation of myInterface
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