jdv_article7 (java default method implementation in interface)

gistfile1.java

interface AsyncInput<T>
{
   void  onReceive(Acceptor<T> acceptor)

   default void read(): Future<T>  {
      final CompletableFuture<T> promise = new CompletableFuture<>();
      onReceive( x -> promise.complete(x) );
      return promise;
   }
   
}