Although your question really doesn't make any sense - you haven't given any useful context to it. You could be writing those lines on a page as text, writing a plugin, stuffing things into velocity - there's no sane answer to that question without knowing what you're trying to do and why you think you might need them
I don't know, if I understand your question right, but of course you can import a java.util class.
Here's an example with java.util.x - Classes : http://www.hascode.com/2010/04/how-to-build-a-confluence-macro-plugin/
I did not test it, but maybe it helps you.
maybe you should start reading here:
Atlassian released a security advisory on 3/20/2019. The full advisory is here: https://confluence.atlassian.com/doc/confluence-security-advisory-2019-03-20-966660264.html In a nutshe...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs