Thanks, I'm glad you like the idea!
My original plan was to focus on the plain installation (no additional libraries), and start with text-based games, so that people could really get a good grounding in the basics of Java. Especially since some people might be expecting to take AP Computer Science in the fall semester. That course generally doesn't have the most "interesting" material, according to many of my students, so I thought this would be a good way to make the basics more fun.
That being said, I understand there's different skill levels, so if you have some Java experience already, I can make a post with some game libraries you might want to use. The other thing is if we were to move to graphics (if there's time over the summer series), I was going to look at using Java Swing GUI library (no additional libraries or installations required, it comes with the basic install).
If you or anyone else would like, let me know your skill level and what you'd like to learn about, and I can find ways to work that in.
I'll be posting more material here this week, but in case, you're interested, I started talking about Java and JRPG-style games here: