javadoc package comments

okay, I can comment in javadoc: methods, classes, interfaces, fields, constructors...

now do i comment packages?
example:
http://java.sun.com/j2se/1.5.0/docs/api/java/util/package-summary.html

"Contains the collections framework, legacy collection classes, event model, date and time facilities, internationalization, and miscellaneous utility classes (a string tokenizer, a random-number generator, and a bit array)."

I'm using Eclipse. Thanks guyz

bampu