title: Elementary graphics in java/scala
body: <p>I'd like to add a real-time graphical representation of what's going on behind some scala code. Just a black window of a given size where I can put colored pixels at random (x, y) points will do. That's exactly want I'll be doing, actually.</p>
  
  <p>What library should I use? I want to stay as simple as possible, so as to avoid mixing in (say) a full-fledged game-writing library just for a quick and dirty way to place pixels on a canvas.</p>