<p>From what I’m hearing, we receive a quick reference sheet that’ll assist us with these things (gridworld/ maybe some Wrapper classes)</p>
<p>the main things you should know about abstract classes and interfaces:
<a href=“http://talk.collegeconfidential.com/mathematics-computer-science/1382581-official-2013-ap-computer-science-thread-17.html[/url]”>http://talk.collegeconfidential.com/mathematics-computer-science/1382581-official-2013-ap-computer-science-thread-17.html</a>
(my post somewhat explains it)</p>