How to create PNG file from byte array of RGB value?

Hi
Here is my problem.
I have drawn some sketchs (through code in runtime) on canvas. I have grabbed the RGB information for the drwan image and converted to byte array.
I have to pass this byte array to server and generate a png file and save.
Please help.

{color:#ff0000}Cross posted{color}
http://forum.java.sun.com/thread.jspa?threadID=5218093
{color:#000080}Cross posting is rude.
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