will be on making UML diagrams in Violet. I will talk about UML in
class, mostly about class and sequence diagrams. They can download the
violet .jar and just run it from the command line, or put it on their
laptops and play from there. It is a very simple GUI, with the
advantage of *not* allowing students to make illegal links in UML.

http://www.horstmann.com/violet/

They will be working on organizing their swamp simulation: 16 or so
life forms - how can they interact? I'm going to suggest that
something like Interaction be a class. For example, there might be an
Eats interaction and a Fertilizes interaction. Eats holds between
Perch and Mosquito, and Catfish and Mosquito, but we should not have
to code those two separately. Instead, some class/interface above both
Perch and Catfish should be in the actor/eater slot of the
interaction, and small flying insects should be in the
eaten/object/recipient slot.