How to alter the contrast/brightness/invert/smooth of an image? (beginner)

Hey,
I'm new to image manipulation and processing and have been told to use Java 2d with Image/ImageIO/MediaTracker/BufferedImages already in order to load and save my image, but I just can't find any nice way to learn how I would go about altering at least the brightness and contrast of the image I loaded up into the buffered image tracked by MediaTracker. After this I will be needing to invert and smooth the image then make a histogram, ais there any good tutorial or book to teach me how I woudl go about modifying the pixels within the image because so far I have no idea about what to do for the algorithm or what filter/classes/methods I should be doing from here. Can anyone help me out on how to start manipulating the images? I've seen a few random examples which don't really explain how the things work and I want to understand how to do the algorithms and processing though.

The book Filthy Rich Clients by Chet Haase and Romain Guy does a pretty good job of explaining how to work with images.
Its companion [website |http://filthyrichclients.org/] has links to code samples. Check out chapters 4 and 8 in the Examples section.

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