Drawing Images with certain parts transparent

Sorry if I sound stupid, I've never done graphics in Java before.

How do I draw an image while leaving pixels of certain colors undrawn?

For example, if I have black colors on the image than it won't be drawn, and instead the corresponding parts on the destination surface is shown instead.

Or is there just anyway to perform pixel operations on 1 pixel, like getPixel and setPixel in Windows API?

Thank you.

[441 byte] By [rayli1107] at [2007-9-27 17:28:06]