It's pretty easy to make your own Sprite class in MIDP 1.0. All you need is an image with all the animation frames in a row, and then a paint method something like this:
void paint(Graphics g)
g.setClip(x, y, width, height);
x - width * frameIndex[state][frame], y,
Graphics.TOP | Graphics.LEFT);
Where state tells whether you're walking left, walking right, jumping, etc., and frame is just the current index into the animation frame sequence for that state.
For a full example, see Game Animation with Java MIDP
at Forum Nokia