What features do modules have that Java packages don't?

For example, say I have the package hello with the classes HelloWorld, CommandLine, and InvalidCommandLineArgument. In Java I would put them in the following structure:

|- hello/
|---- HelloWorld.java
|---- CommandLine.java
|---- InvalidCommandLineArgument.java

With each file having "package hello;" at the top of the file.

With modules it seems each file is in seperate module. Eg. "module hello.HelloWorld" and then each module in the package must import any other modules it uses from the same package. In Java classes in the same package can use other classes without importing. Am I missing something which makes this feature similiar to that in Java?