I Am A Software Engineer , I Can Write "hello World" Program Blog Usage of new Collections factory methods introduced with Java 9

Initializing a SetSet<String> countrySet = Set.of("France","Belgium","Germany");Initializing a ListList<String> countryList = List.of("France","Belgium","Germany");Initializing a MapMap<String,String> countryCodeMap = Map.of("France","FR","United States","US","Canada","CA");