How does Java decide when to import?

Question

Why doesn\'t Java need to import classes like Integer, String, etc. while it needs to import other classes?

Answer 1

For the question for "Is java.lang the only one auto-import package?" There is two packages.

1. java.lang
2. unnamed

you can look up here for more. https://www.quora.com/Which-package-is-available-by-default-in-java