Module Imports

A special kind of import is the "module import."

Just like a package import (import package_name.*) will import all the classes in that package, an import module declaration will import all the classes in all the packages contained within that module.

// Same as writing
//
// import java.util.*;
// import java.lang.annotation.*;
// import java.lang.reflect.*;
// ... and so on for every package in the java.base module
import module java.base;

class Main {
    void main() {
        // You can now freely use any of the classes from the imported module
        Collection<String> c = List.of("do", "re", "mi");

        IO.println(c);
    }
}

This has much the same upsides and downsides as a package import. It is much easier to write this and get all the classes you want, but in exchange it might be harder to see where a particular class comes from when you are reading code later.