I'm surprised he thinks the core platform should offer that, the JDK is large enough as it is thank you. Any number of countless application generators and libs make it easy. Even a quick glance at maven central would've answered his question.
In other words, Java wont search the internet for you.
I'd argue Maven is a giant kludge in the very spirit being argued about. If the underlying platform was better Maven would go away, but the existence of it prevents useful discussions about how to improve the underlying platform with "why aren't you using maven?" "because it sucks the life out of my soul" etc.
The other classic example is the increasingly popular multi-cursor editing editors, which should be a giant red flag over the lack of expression in the programming language. What happens is they make it almost tolerable, and the incentives to improve are thus diminished greatly, to the point the problem will be ignored by most.
In other words, Java wont search the internet for you.