kotlin return interface implementation

A class can implement more than one interfaces. Some of the common sources of data include local databases, cache, and online servers. The name “Dagger” is inspired in part by the nature of dependencies in software development. I have a Kotlin interface with a default implementation, for instance: interface Foo { fun bar(): String { return "baz" } } This would be okay until I try to implement this interface from Java. can have attributes but must be abstract, or provide an implementation of accessors. Which implies that we can have a default implementation to all the properties and functions defined in the Interface. When I do, it says the class need to be marked as abstract or implement the method bar(). Kotlin Interfaces in Kotlin can contain declarations of abstract methods, as well as method implementations. Directly using functions has the following advantages. While Kotlin itself provides many primitive operations for safely handling null values and provides non-nullable data types, it is missing the present/not-present idiom available in FP and other languages. Expose the interface to clients. Functional (SAM) interfaces | Kotlin Kotlin Delegated properties | Kotlin

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