Dot Matrix port for Java.
Basically, when you run the project you're presented with a window. You can set the window size and the total run time for the dots. Click a square to activate it/deactivate it.
No animations yet.
Demo video: https://www.youtube.com/watch?v=AiTv4jrpLog
Run it here (must have Java on device running!): https://github.com/edwinfinch/dotmatrixjava/blob/master/DotMatrix.jar