<ul><li>Default methods in interfaces in Kotlin are not compatible with Java.</li><li>When using default methods in interfaces, the default implementation is not visible when called from Java.</li><li>The deprecated @JvmDefault annotation has been replaced by @JvmDefaultWithoutCompatibility1 and @JvmDefaultWithCompatibility2.</li><li>Kotlin automatically creates an Abstract class in the Interface called Interface$DefaultImpls to implement default methods.</li></ul>

Compatiblity between Kotlin and Java regarding Default Methods

Discover more