An unbounded wildcard is the type argument "?", a feature of generics in the Java language.
How come one must use the generic type Map<?, ? extends List<?>> instead of a simpler Map&…
java generics bounded-wildcard unbounded-wildcardI was playing around in the Scala REPL when I got error: unbound wildcard type. I tried to declare this (…
scala types existential-type unbounded-wildcardI was reading about generics and I did not understand the need for unbound wildcards and how it differs from …
java generics unbounded-wildcard