Screen Scraping (poker application) with Java

I would like to write a custom application that can screen scrape a poker site. I know there are applications that do this, and I already have some, but I'm looking for my own little project so let's ignore that fact for now. The java program needs to be able to watch a poker game as it is going on and be able to interpret the player's actions on the screen.

From what I've discovered so far, I can use the java Robot class to get a bitmap of what is displayed currently on the screen. The problem is that I need this application to be able to watch up to 12 poker tables at once while they are minimized (since they obviously won't all fit on my desktop). An application called IdleMiner currently can do this, but I'm guessing that this isn't written in java.

Is there any way to be able to get screen scrapes of minimized windows using java? I just need to be able to get a bitmap of the contents of the screen every second or so.