Example of how to create anonymous types in java, using intersection casts
with((Anon & Quacks & Waddles) i -> i, ducklike -> {
ducklike.quack();
ducklike.waddle();
});You can also enhance existing types with List with new methods like map
interfaceMappable<T> extendsDelegatesTo<List<T>> {
default <R> List<R> map(Function<T,R> mapper) {
returndelegate().stream().map(mapper).collect(Collectors.toList());
}
}
with((ForwardingList<String> & Mappable<String>)() -> stringList, list -> {
list.map(String::toUpperCase).forEach(System.out::println);
});