Creating Image Buffer for long painting tasks

in the post -
http://forum.java.sun.com/thread.jspa?threadID=641283&messageID=3785845
tjacobs01 says...
"First of all in this case you would definitely want to create your image before sending it to the screen. ... What you should do is create an ImageBuffer, clear the background, and then paint your graph on top of it."
In my program I have a JPanel's paint method pass its Graphics2d object to a class that does A LOT of painting and processing.
The performance is decent now but when i read that statement i realized i should probably be doing it that way.
How would i implement an image buffer?

i didnt realize there was a java2d section - i reposted this there.
http://forum.java.sun.com/thread.jspa?messageID=3800261

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Creating Image Buffer for long painting tasks

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