How can I display or use existing java classes?

for example, I want to use java.util.List to display association class in class diagram menu. or using precompiled package, jar files.

How can I use that?
Should I make existing classes maually?

thanks.

Dear jskim,

Thank you for your message. You can reverse the standard java package or your precompiled packages into the UML model through Instant Reverse. After reversing the class into the model, you can use it in your diagrams. For more information about Instant Reverse, please visit Chapter 7 –Instant Reverse of VP-UML User’s Guide

http://www.visual-paradigm.com/edocs.jsp?url=content/product/vpuml/vpuml5UserGuide/html/VP-UMLUserGuide-DHTMLHelp-09-1.html&resourceType=document&resourceDetail=vpuml5UserGuide

If you have any further questions, please feel free to contact us again.

Best regards,
Rain