Any decent links to Java2D / BufferedImage / Math type FX tutorials?

As the subject asks,

I’m obsessed with creating display/images with Java alone, like random pixels in an array that displays on JFrame, a bit like what ‘processing’ does but I’m looking for decent links that deal with just Pure Java in like eclipse/netbeans if anyone could help us out? At the moment I’m only able to created random images, but there must be something around that deals with maths to create ‘more less-random’ images - maybe using the math class etc? For example, mandelbrots etc

Cheers