Yes, Java's type system "so weak". Just because many other popular languages have similarly weak type systems doesn't make them less weak. Also, as a long-time

Yes, Java's type system "so weak". Just because many other popular languages have similarly weak type systems doesn't make them less weak. Also, as a long-time Haskell user, I can assure you that nullable types were nothing new even several decades ago. Perhaps you have only worked with object-oriented languages, where nullability is typically the default (which is a bad idea).